Big Bend Chat

Random Bits from the Outside World => GPS Gear and Tips => Topic started by: mule ears on June 14, 2010, 04:31:18 PM

Title: Gmap4 - An enhanced Google Map viewer
Post by: mule ears on June 14, 2010, 04:31:18 PM
Just ran across this, looks very user friendly and accepts multiple kinds of GPS files.

http://www.mappingsupport.com/p/gmap4.html (http://www.mappingsupport.com/p/gmap4.html)
Title: Re: Gmap4 - An enhanced Google Map viewer
Post by: Undertaker on June 14, 2010, 05:25:01 PM
Looks interesting.
Title: Re: Gmap4 - An enhanced Google Map viewer
Post by: Robert on June 14, 2010, 05:39:55 PM
Nice, I like that you can jump from the satellite view to topo. Also I prefer the shaded topo to the non-shaded ones. Thanks.
Title: Re: Gmap4 - An enhanced Google Map viewer
Post by: RichardM on June 14, 2010, 06:04:14 PM
Cool. Here's the Chisos Basin:
http://www.mappingsupport.com/p/gmap4.php?ll=29.2675,-103.3 (http://www.mappingsupport.com/p/gmap4.php?ll=29.2675,-103.3)
Title: Re: Gmap4 - An enhanced Google Map viewer
Post by: badknees on June 14, 2010, 07:43:31 PM
Just ran across this, looks very user friendly and accepts multiple kinds of GPS files.

http://www.mappingsupport.com/p/gmap4.html (http://www.mappingsupport.com/p/gmap4.html)

Which GPS did you buy? :icon_biggrin:
Title: Re: Gmap4 - An enhanced Google Map viewer
Post by: homerboy2u on June 14, 2010, 10:58:11 PM
Just ran across this, looks very user friendly and accepts multiple kinds of GPS files.

http://www.mappingsupport.com/p/gmap4.html (http://www.mappingsupport.com/p/gmap4.html)

Which GPS did you buy? :icon_biggrin:
:icon_lol: :icon_lol:...Are we straightening out an old tree? :rolling:
Title: Re: Gmap4 - An enhanced Google Map viewer
Post by: mule ears on June 15, 2010, 05:49:02 AM
Just ran across this, looks very user friendly and accepts multiple kinds of GPS files.

http://www.mappingsupport.com/p/gmap4.html (http://www.mappingsupport.com/p/gmap4.html)

Which GPS did you buy? :icon_biggrin:
:icon_lol: :icon_lol:...Are we straightening out an old tree? :rolling:


Just because I don't use the technology doesn't mean I don't appreciate it.  One has to walk before one runs.  Just learning.  I knew this would get Homero all excited.   :eusa_think:  :evil:
Title: Re: Gmap4 - An enhanced Google Map viewer
Post by: MilesOfTexas on June 15, 2010, 09:22:14 AM
Cool. Here's the Chisos Basin:
http://www.mappingsupport.com/p/gmap4.php?ll=29.2675,-103.3 (http://www.mappingsupport.com/p/gmap4.php?ll=29.2675,-103.3)

Very, very, very cool! :icon_biggrin:
Title: Re: Gmap4 - An enhanced Google Map viewer
Post by: Jelf on June 26, 2010, 06:33:14 PM
Greetings,

I am the author of Gmap4 and thank you for the kind words.

Gmap4 version 1.5.012 has just been posted.  This free software adds detailed topographic maps (USA and Canada) to Google Maps and lets you view your GPS data on those maps.

Since this software runs entirely online, there is nothing to buy, nothing to download, nothing to install.  When you use Gmap4 you should now see “6-26-2010 Update” in the lower left corner of your screen.  If you click Actions ==> About, then it should say Version 1.5.012.  If you do not see those things, then please clear your browser’s cache and try again.

This update (among other things) restores the ability to place your GPS data (KML and GPX files) online as Google Documents.  This feature advances state-of-the-art for Google Documents and is unique to Gmap4.

To see the full list of what is new or changed, go to the Gmap4 homepage and click What’s New.
http://www.mappingsupport.com/p/gmap4.html (http://www.mappingsupport.com/p/gmap4.html)

Updated pdf ‘Help’ file with clickable links:  http://www.mappingsupport.com/p/gmap4_help.pdf (http://www.mappingsupport.com/p/gmap4_help.pdf)

Here is a sample map that includes information from three data files:
http://www.mappingsupport.com/p/gmap4.php?q=google,0AUba9Qv1W8-rZGQzd2I0cmRfNDZkM3c3em5kNA&ll=47.382544,-120.917587&t=t1&z=11 (http://www.mappingsupport.com/p/gmap4.php?q=google,0AUba9Qv1W8-rZGQzd2I0cmRfNDZkM3c3em5kNA&ll=47.382544,-120.917587&t=t1&z=11)

Enjoy,
Joseph Elfelt
Title: Re: Gmap4 - An enhanced Google Map viewer
Post by: RichardM on June 27, 2010, 10:55:31 AM
Great to have you on board, Jelf. If I might add a suggestion, when I used the "Map URL" action and copied and pasted the resulting URL, it included line breaks which resulted in <br> tags in the URL. Any chance you could make it a single line?
Title: Re: Gmap4 - An enhanced Google Map viewer
Post by: Jelf on June 27, 2010, 02:39:38 PM
Richard,

The line breaks in the map URL are one of the compromises I made so that Gmap4 could run nicely in as few as 400 pixels by 400 pixels.  But you're right, it's a nuisance since you need to manually delete those line breaks in order to use the URL.

I added a note about this to my list of possible enhancements.
Title: Re: Gmap4 - An enhanced Google Map viewer
Post by: iCe on June 27, 2010, 04:13:59 PM
Cool. Here's the Chisos Basin:
http://www.mappingsupport.com/p/gmap4.php?ll=29.2675,-103.3 (http://www.mappingsupport.com/p/gmap4.php?ll=29.2675,-103.3)

There are caves in BiBe?
Title: Re: Gmap4 - An enhanced Google Map viewer
Post by: Jelf on September 02, 2010, 07:12:08 PM
Do you have any .TPO files from the National Geographic TOPO software?  Gmap4 can now display those.  Often the topographic maps displayed by Gmap4 (provided at no cost by www.MyTopo.com (http://www.MyTopo.com)) will be superior and/or more current than the NG topographic maps.

You do need to place your TPO or other data file online before it can be displayed by Gmap4.  The easiest/fastest way to place a TPO file online is via Google Sites (free).  Don?t be shy.  You will find hand-holding-step-by-step instructions in the Gmap4 Help file.

Here is the general recipe for building a URL to display a TPO file with Gmap4 (this is not a real link!):
http://www.mappingsupport.com/p/gmap4.php?t=t2&q=htpp://url_to_your_file.tpo (http://www.mappingsupport.com/p/gmap4.php?t=t2&q=htpp://url_to_your_file.tpo)

Below is a link to the Gmap4 homepage.  Check out the 'Examples' button and Quick Start section of the 'Help' file.
http://www.mappingsupport.com/p/gmap4.html (http://www.mappingsupport.com/p/gmap4.html)

Enjoy,
Joseph
Title: Re: Gmap4 - An enhanced Google Map viewer
Post by: homerboy2u on September 03, 2010, 09:41:29 AM
Jelf...welcome to the board. I have not yet tinkered with it, but question: Can it also work with coordinates fed from the Mexican side?. Logic dictates no, but it does not hurt to ask. Homero
Title: Re: Gmap4 - An enhanced Google Map viewer
Post by: Jelf on September 03, 2010, 09:53:06 PM
You can feed Gmap4 coords for anywhere and get a map.

Veracruz, Mexico:
http://www.mappingsupport.com/p/gmap4.php?ll=19.177598,-96.142731&t=t1&z=8 (http://www.mappingsupport.com/p/gmap4.php?ll=19.177598,-96.142731&t=t1&z=8)

Nice, France:
http://www.mappingsupport.com/p/gmap4.php?ll=43.706601,7.266083&t=t1&z=8 (http://www.mappingsupport.com/p/gmap4.php?ll=43.706601,7.266083&t=t1&z=8)

The Gmap4 homepage has a 'Help' file that explains how to use the URL parameters.

For USA and Canada maps you can open them with the topo map by changing
&t=t1 to &t=t2



Title: Re: Gmap4 - An enhanced Google Map viewer
Post by: homerboy2u on September 04, 2010, 01:27:08 PM
Muchas Gracias, Jelf...I love it. Exploring some more on the matter.
Title: Re: Gmap4 - An enhanced Google Map viewer
Post by: Jelf on December 09, 2010, 10:02:19 AM
Buenos d?as from the Pacific Northwest.

Yesterday I posted version 1.8.1 of Gmap4.  New things include:
   Search (Click Menu ==> Search)
   Place one icon on the map via a URL parameter (&icon=)
   Print via your browser

Gmap4 homepage:  http://www.mappingsupport.com/p/gmap4.html
Check out the menu links for:
   What’s new
   Examples
   Help

Search the Help file on “(New)” to find details on the new stuff.

To the best of my knowledge the Search - List feature is unique to Gmap4.

Enjoy,
Joseph
Title: Re: Gmap4 - An enhanced Google Map viewer
Post by: Jelf on January 02, 2011, 05:41:18 PM
Gmap4 has been updated to version 1.8.3

The present-day magnetic declination for  the map center is now always displayed in the lower right corner.  This value is produced using software from http://www.ngdc.noaa.gov/IAGA/vmod/igrf.html combined with data from http://www.ngdc.noaa.gov/geomag/WMM/back.shtml.
Since the magnetic declination is always changing, the older value printed on maps can be wrong by several degrees.

I also updated my links page to show (1) reviews of Gmap4  and (2) sites that are already using Gmap4 to produce online interactive maps.
http://www.mappingsupport.com/p/gmap4_links.html

Finally, if you are interested in the search feature and/or print feature, please check the ‘Help’ file (and use the Table of Contents) to be sure you have seen the most info on those features.
http://www.mappingsupport.com/p/gmap4_help.pdf

The link below will display a world map.  To test-drive the search feature click Menu==>Search.
http://www.mappingsupport.com/p/gmap4.php?ll=38.259207,-16.760195&t=t1&z=2

Enjoy,
Joseph
Title: Re: Gmap4 - An enhanced Google Map viewer
Post by: RichardM on January 02, 2011, 05:47:59 PM
Great stuff, Joseph! I used it in planning for my last Big Bend trip.
Title: Re: Gmap4 - An enhanced Google Map viewer
Post by: Jelf on January 19, 2011, 02:07:59 PM
Jelf...welcome to the board. I have not yet tinkered with it, but question: Can it also work with coordinates fed from the Mexican side?. Logic dictates no, but it does not hurt to ask. Homero

Gmap4 hablas lat/lng and utm coordinates worldwide.
WGS84 datum.
You can search worldwide on any reasonable way to write a lat/lng (Menu ==> search)

Gmap4 is a worldwide app.  The only limitation is that the detailed topographical maps only cover the USA  and Canada.  Of course you can look at Google's Terrain view for Mexico.

Below is info on a UTM update I just posted
- - - - -

Gmap4 has been updated to version 1.9.1 dated January 17, 2011.  This version adds support for UTM coordinate grids.  All UTM support in Gmap4 uses the WGS84 datum.  This UTM support works worldwide.  For more info on UTM coordinates see:  http://en.wikipedia.org/wiki/Universal_Transverse_Mercator_coordinate_system

(Pay back time:  When you visit other outdoor-related forums, please do a search and see if Gmap4 has been mentioned.  If not, it would just take a moment for you to pass the word along.  Also, are you doing the social network thing?  Consider saying something nice about Gmap4.)

Here’s a map of Grand Canyon Village with a UTM grid.
http://www.mappingsupport.com/p/gmap4.php?ll=36.059592,-112.139836&t=t2&z=14&coord=utm

To toggle UTM support on and off, click Menu ==> UTM On/Off.  If UTM is ‘on’ then Gmap4 gives you UTM information in three ways:

1.  A UTM grid is displayed.  This UTM grid is displayed on both the MyTopo topographic maps (USA and Canada) and the standard views (aerial, etc) provided by Google Maps.

2.  The lower right corner of the screen will always show the UTM zone and UTM coordinates for both the cursor and map center.

3.  You can get the UTM zone and coordinates for any point on the map by right-clicking that point.

Things to keep in mind


You can build you own map links by using URL parameters.  If you want your map to appear on the user’s screen and already have UTM turned on, then add this URL parameter:  &coord=utm

Here is a comparison:
With UTM on
http://www.mappingsupport.com/p/gmap4.php?q=http://www.mappingsupport.com/p/gmap4/helpfile/Stafford_Creek.kml&t=t2&coord=utm
With UTM off (default)
http://www.mappingsupport.com/p/gmap4.php?q=http://www.mappingsupport.com/p/gmap4/helpfile/Stafford_Creek.kml&t=t2

If you zoom out far enough then you will not see a UTM grid.  Instead you will only see vertical red lines which mark the edges of the UTM zones.

UTM grid lines that are near the edge of their zone often appear curved when displayed using the map projection used by Google Maps.  The grid lines in the adjoining zone will curve in the opposite direction.  For example, the next map is centered near Lake Tahoe.  The red line marks the edge of adjoining UTM zones.  Double click each side of the red line (this changes the map center) and watch the UTM grid lines change.  The grid lines are calculated based on the UTM zone that contains the center of the map.
http://www.mappingsupport.com/p/gmap4.php?ll=39.115536,-120.208437&t=m&z=8&coord=utm

Some MyTopo topographic maps already have a UTM grid printed on them.  Caution!  Some of those printed grids are based on the older datum NAD27.  Those older grids will have a uniform offset from the grid displayed by Gmap4 which is based on datum WGS84 .  For example: Here is a map showing part of the Alpine Lakes Wilderness area in Washington State where the MyTopo maps have a UTM grid based on the WGS84 datum.  Click Menu ==> UTM  On/Off and you will see the faint UTM grid printed on the map:
http://www.mappingsupport.com/p/gmap4.php?ll=47.47229,-120.80588&t=t2&z=14&coord=utm
By contrast, here is a map showing part of the Yosemite Valley area in California, where the MyTopo maps have a UTM grid based on NAD27.  Note the uniform offset between the two sets of grid lines.
http://www.mappingsupport.com/p/gmap4.php?ll=37.736733,-119.568449&t=t2&z=14&coord=utm

Usually (but not always) the different zoom levels use a different scale for the UTM grid.  To learn the grid scale, compare the cursor coordinates (lower right corner) as you point to adjacent grid lines.  If you want to know the zoom level, right click the map.

Maps with UTM grid lines can be printed.  File ==> Print Preview

If you know of any other map viewing software that can display the MyTopo topographic maps along with a UTM grid, I would enjoy knowing about it.

Future UTM improvements

There are different methods for putting labels on the grid lines.  I am pondering what will work best.
Another possible improvement is to let the user change the line width, color and/or spacing.
Other ideas?

Next Gmap4 update

Bad news:  The ‘Search’ feature of Gmap4 no longer works very well for placenames.  This feature uses Google’s ‘geocoding’ service on the backend.  OK, I admit it.  Gmap4 was pushing the envelope in its use of that service.  Whoops - Google pushed back.  Guess who won?  I will add a second search tool that is designed to work well with placenames. 

Good news: The existing ‘Search’ feature of Gmap4 still works fine for searching on (1) anything related to addresses including names of many settlements that no longer exist and (2) any reasonable way to write a latitude/longitude pair.

Finally, if you find Gmap4 to be useful I hope you can take a moment and do some ‘pay-back’ by letting other people know about it.

Enjoy!
Joseph - Gmap4 author
Title: Re: Gmap4 - An enhanced Google Map viewer
Post by: Jelf on May 06, 2011, 10:53:21 PM
I just promoted Gmap4 from version 1 to version 2.

Little reason:
  I added support for viewing the set of topo maps that used to be known as Terraserver and now are known as Microsoft Research Maps.  Click the map type button in the far upper right and select “US Topo”.  You can really see the quality difference compared to the MyTopo maps.

The US Topo maps often load a bit slow.  Part of the reason is that each map tile must be re-projected on-the-fly in order to match the map projection used by Google Maps.  I added support for these maps in case they show old (abandoned?) trails that are not on the MyTopo maps.

Big reason:
  This update introduces a new text file format that makes it super easy to produce maps.  For a quick look, scroll down a bit on the Examples page:  http://www.mappingsupport.com/p/gmap4_examples.html

This new file format is so easy that middle school students can quickly learn how to produce maps.

Maps can include:
  *  Many different kinds of symbols (i.e. markers/icons)
  *  Lines of any color and any width
  *  Balloons that appear when symbols are clicked
  *  Links in the balloons
  *  Clickable photo thumbnails in the balloons
  *  And more

Did I mention that this is truly easy

For the details, you can search the Help file on ‘delimited’.  Or just go to page 32 in the 5-6-2011 version of the Help file.  http://www.mappingsupport.com/p/gmap4_help.pdf

Homepage:  http://www.mappingsupport.com/p/gmap4.html

Enjoy.

Joseph
Title: Re: Gmap4 - An enhanced Google Map viewer
Post by: Jelf on September 12, 2011, 03:57:06 PM
I just promoted Gmap4 version 2.1.4 from testing into production.  Some of the new features are described below.  For a full list of the changes in this version please see http://www.mappingsupport.com/p/gmap4_whats_new.html

Remember, Gmap4 lives in the cloud and does not require you to download or install anything.  Anytime you view a map with Gmap4, you automatically will be using the most recent version.

The big news is that you can now strap on a personal jet pack and fly around in 3D anywhere in the world.  (The Gmap4 ‘Search’ feature is a useful way to zip you to the spot where you wish to begin flying.)

You can fly at low altitude over any map that has a GPS track and see the world in 3D.  No sweat, no bug bites, no blisters.

All you have to do is download the Gmap4 ‘Help’ pdf file dated September 12, 2011 or more recent and search for ‘Tips for flying’.  Anyone can quicky and easily learn to fly with just a mouse by taking a quick trip through flight school by reading those tips.  Those tips will show you how to fly over the John Muir Trail in California starting from the summit of Mt. Whitney.

Gmap4 ‘Help’ file:  http://www.mappingsupport.com/p/gmap4_help.pdf

In addition, the ‘directions’ feature has been re-written.  Right-click the map and then click either ‘Direction from here’ or ‘Direction to here’.  After the route appears, you can drag it to make changes.  You can build a Gmap4 URL that will open with the directions panel displayed and the destination filled in.  This will be useful for helping people obtain directions to a meeting spot.  Search the Gmap4 Help file for ‘Tips for using directions’.

Also, information on how to donate has been added to the ‘Action’ menu and the Gmap4 website.

Enjoy!
Title: Re: Gmap4 - An enhanced Google Map viewer
Post by: MilesOfTexas on September 12, 2011, 06:11:14 PM
Jelf, thank you for this most useful tool!  I was able to use it to locate a very hard to find slot canyon in New Mexico last year.  I will definitely visit the donate link.  Any chance of a smartphone app for this tool?
Title: Re: Gmap4 - An enhanced Google Map viewer
Post by: Jelf on September 13, 2011, 01:46:38 PM
Jelf, thank you for this most useful tool!  I was able to use it to locate a very hard to find slot canyon in New Mexico last year.  I will definitely visit the donate link.  Any chance of a smartphone app for this tool?

Sadly there are not enough hours in the day to fulfill all  of life's obligations and also crank out a smartphone app.  But I do plan to produce further Gmap4 updates as time allows.
Title: Re: Gmap4 - An enhanced Google Map viewer
Post by: Terlingua Express on September 13, 2011, 06:01:23 PM
I am currently running the following browsers.

Google Chrome 13.0.782.220 m
Mozila Firefox 6.0

With the exception of your site and help files, everything else loads up as a blank page....all map links, same thing.

Any idea what to look for, as the problem?
Title: Re: Gmap4 - An enhanced Google Map viewer
Post by: Jelf on September 14, 2011, 11:03:14 PM
After the September 12th update to Gmap4 I heard from a handful of people that this new version gave them a blank screen and nothing else.  For most people the new version worked fine but for an unfortunate few it did not.  I want to thank those that spoke up.  After all, when things work fine for me, I have no way of knowing that they do not work fine for you unless you tell me.  The best way to reach me is to e-mail through my contact page:  http://www.mappingsupport.com/p/gmap4_contact.html

Late today I updated the Gmap4 code.  If you click Menu ==> About then you will see the date  September 14, 2011 (or later).

If you are still having trouble viewing maps with Gmap4, then I have a favor to ask.  In addition to updating the code I also put together a short list of easy things that you can try to get the latest version of Gmap4 working on your system.  Here’s the favor:  Please download the latest copy (dated September 14, 2011) of the ‘Help’ file (http://www.mappingsupport.com/p/gmap4_help.pdf) and search that file for ‘tips on flying’.  Near the end of that section you will see a heading that starts “Background...”.  That section gives you a peek under the hood and suggests several easy/quick things you can do to try and get the current version of Gmap4 working on your system.

Some of those suggestions have worked for others, so I hope if you are having problems that you take a few minutes and give them a try.  And if nothing else works, then the last suggestion gives you a link to the prior version of Gmap4 which does not include the new ‘Earth’ feature which seems to be the source of most of the problems.

But since being able to fly over your GPS track (or any other data file) in 3D is easily the coolest feature in Gmap4, I most certainly hope you are able to convince your system to run the current version of Gmap4 so you can waste as much time as I have flying here and there.  It’s addictive but - hey - you’ve been warned.
Title: Re: Gmap4 - An enhanced Google Map viewer
Post by: Jelf on September 18, 2011, 09:01:32 AM
Gmap4 has been updated to version 2.1.6 dated September 17, 2011. 
Homepage:  http://www.mappingsupport.com/p/gmap4.html

Reminder:  Since Gmap4 lives in the cloud (1) you never have to download or install Gmap4 and (2) you are always automatically using the latest version of the code.  But if Gmap4 does not seem to work then please clear your browser’s cache and try again.  To see the Gmap4 version number you can click Menu ==> About on any map.

This update fixes the ‘blank screen’ problem that some users experienced after the September 12th update.  If you experienced that problem, then please try Gmap4 again.

In order to use the new 3D ‘Earth’ view, your computer system needs to have the Google Earth browser plug-in installed.  The Gmap4 code now checks to see if your system already has this plug-in installed.  If your computer system does not have this plug-in installed, then you will see a message telling you that and a link to Google where you can download the plug-in if you decide to install it.  If you decide to install the plug-in, please follow the instructions in that message.  You need a broadband connection and a reasonably modern computer to use the 3D ‘Earth’ view.

If you decide to not install the plug-in, simply close the message window.  You can continue using all the other features of Gmap4 except the ‘Earth’ view.
Title: Re: Gmap4 - An enhanced Google Map viewer
Post by: jave on September 18, 2011, 10:19:25 PM
Enjoying the Gmap4 on safari.  Yes there are caves; Mexican freetail bats are hanging out in the one on the left just before you get to Laguna Meadows.  As you drive in from Persimmon Gap you can spot one a mile to the east which has some art.
Title: Re: Gmap4 - An enhanced Google Map viewer
Post by: Jelf on December 21, 2011, 06:44:57 PM
The Gmap4 production code is now version 2.3.  This is the first version that includes special features for smartphones and other mobile devices.

1.  Gmap4 can now find your location on the map.  This service will use some or all of:
*  Your IP address
*  Cell towers
*  Wi-fi hotspots
*  Any GPS chip in your phone or other mobile device

Simply open any map in your phone’s browser and then select Menu ==> Findme.  You can try this right now on your desktop/laptop just to see how it works.  However, your desktop/laptop location will likely not be very accurate since in many cases only your IP address will be used.

You can also build Gmap4 URLs that will automatically run the Findme feature when the map opens.  Simply include the parameter ‘findme=on’ in the Gmap4 URL.
Example:  http://www.mappingsupport.com/p/gmap4.php?findme=on

Since Gmap4 uses the Google maps Application Programming Interface (API), this feature only works if your phone’s browser is online to the internet.

Also, because Gmap4 is a web application, you do not need to download or install anything in order to use Gmap4 on your phone.  To open Gmap4 on your phone:
A.  Open your phone’s browser.  (Remember, that browser has to be online.)
B.  Do a web search for Gmap4 - the first hit should be the Gmap4 homepage
C.  Select the link just under the homepage title.  That link opens Gmap4 and displays a map of the world.
D.  Select Menu ==> Findme

Of course you can save the Gmap4 URL as a bookmark in your phone’s browser.

Gmap4 does not save your location or report it to anyone.  For more details, please search the Gmap4 Help file on ‘mobile’.
http://www.mappingsupport.com/p/gmap4_help.pdf

Here are two links with more information if you are curious how this works:
http://www.mozilla.org/en-GB/firefox/geolocation/
http://support.google.com/gmm/bin/answer.py?hl=en&cbrank=2&cbid=-13t9fywlvvabr&ctx=cb&answer=39894&src=cb

2.  You can turn off the coordinates in the lower right corner

Turning off the coordinate display in the lower right will let you see more of the map.  You can toggle that display by selecting Menu ==> UTM - LatLng - Off

To open Gmap4 with that display already off, include the parameter ‘&coord=off’ in the Gmap4 URL
Example:  http://www.mappingsupport.com/p/gmap4.php?findme=on&coord=off

3.  Tweaking the mobile interface
Gmap4 is not a ‘native’ app for your phone.  Instead, the exact same code that runs in the browser on your desktop/laptop also runs in the browser on your phone.  Amazing!  But this means my options for improving the interface when running on a phone are somewhat limited.  What I can do fairly easily is add buttons.  However, each button would cover part of the map.

Question:  Are there any features of Gmap4 important enough that they should have their own buttons?  One obvious candidate is the ‘Findme’ feature.  Any others?

4.  The MyTopo maps now display ads in one corner.  That was not my idea!
For example, this map shows part of Yellowstone National Park:
http://www.mappingsupport.com/p/gmap4.php?ll=44.461721,-110.832396&z=14&t=t2

The Trimble Company now owns the MyTopo maps.  As the 'price' for being allowed to continue displaying the MyTopo maps at no cost, Gmap4 must display Trimble's ad images when the MyTopo maps are on the screen.

Joseph, the Gmap4 guy
Redmond, WA
Title: Re: Gmap4 - An enhanced Google Map viewer
Post by: RichardM on December 21, 2011, 08:14:23 PM
However, your desktop/laptop location will likely not be very accurate since in many cases only your IP address will be used.
It says I'm in my next door neighbor's front yard. :icon_lol:

This is still by far my favorite free online mapping tool. :eusa_clap:
Title: Re: Gmap4 - An enhanced Google Map viewer
Post by: Jelf on January 29, 2012, 01:36:44 PM
The Gmap4 code has been updated to version 3.0.  There are two new ‘big’ features that many people will find useful.

First, Gmap4 can now display a new set of very high resolution USA topographic maps that (1) are a better quality image than the MyTopo maps, (2) do not have heavy watermarks obscuring part of the map and (3) do not have any ads.  The link below displays a basic map of the USA.  Zoom in to your favorite area (or use the ‘Search’ feature) then open the menu in the upper right corner and select “t4 Topo High”.
http://www.mappingsupport.com/p/gmap4.php?ll=37.125286,-94.21875&t=m&z=4

You can also set the amount of hill shading you prefer to see on these new maps.  Click Menu ==> Hill shading.  And there is a new URL parameter (&hillshade=) you can use to set the hill shading in any Gmap4 URLs that you make.

A developer in California named Matt (http://CalTopo.com) produced these new topo map tiles from data he obtained from the USGS.  Matt is paying out of his pocket to host these new map tiles on Amazon’s cloud service.  It is my great hope that the Gmap4 user community taken as a whole will be willing to make sufficient donations to pay its share of Matt’s Amazon bill. The Menu button on the map has a ‘donate’ link.

Matt’s high resolution topographic map tiles should cover the states show in green on the following index map.  I think the states that are not done yet are FL, LA, MA, MS, NH, RI, SD, VT and WY.
http://nationalmap.gov/historical/index.html
As the USGS finishes high resolution scans (660 pixels per inch) for the remaining states, Matt will be processing that data into tiles.

The Gmap4 ‘Help’ file has more information on these new maps and also instructions for how you can report any problems you discover.

Second, Gmap4 now includes a trip planning feature called “Make a map”.  You can now click the map to make waypoints, routes and tracks.  You can download your work in a GPX file and then upload that information into many handheld GPS units.  Of course you can also put your GPX file online and then make a Gmap4 URL to display your file.  This feature works worldwide.

Gmap4’s implementation of this feature lets you:
* Click once and create both a waypoint and routepoint
* Edit any data field (including GPS symbol name) that causes information to appear on your GPS screen

“Make a map” quick start:
1.  Zoom in where you want to do trip planning
2.  Set the map view you want
3.  Click Menu  ==> Make a map
4.  Click a few spots on the map.  Distance in miles and kilometers is reported in the lower right corner.
5.  Right click any point
6.  Click “Download GPX file”
7.  Right click the URL to the GPX file and save it on your harddrive
8.  Load the GPX information into your GPS

Each click you just made on the map sets a draggable (click-hold-drag) waypoint and routepoint.  This is the Gmap4 default for trip planning.

For more information on these features, please visit the Gmap4 homepage and download the current Help file.  The sections that describe these new features are marked “(New)” in the table of contents.
Gamp4 Homepage:  http://www.mappingsupport.com/p/gmap4.html

I welcome your suggestions for improvements and any bug reports.

Enjoy!

Joseph, the Gmap4 guy
Title: Re: Gmap4 - An enhanced Google Map viewer
Post by: Jelf on March 22, 2013, 04:02:41 PM
Recently Gmap4 was updated to version 4.1 and now includes a unique map-in-a-link feature that is worth mentioning.  Anyone can now make a custom map and save their data right in a Gmap4 link.  You do not need to save your data in a separate file such as a GPX or KML file.  This may be the easiest and faster way for you to make a custom online topographic map.

To try out this feature:
1.  Click Menu ==> Draw and Save
2.  Click the map a few times to set draggable symbols and draw a line
3.  Rightclick any symbol and select “Gmap4 display long link”

You can copy the link that is displayed, paste it into a new browser address bar, hit enter and your custom map will be displayed.

This feature also works on your iPhone, iPad, android and other mobile device.  Remember, Gmap4 is a browser app and your browser has to be online.  After you tap the screen to set some draggable symbols then tap a symbol and select “Action Menu”.  The list of actions include two different ways to save a Gmap4 link that includes your data.

More information on this map-in-a-link feature can be found in the following three places.

1.  What’s new page
Note the tip about deleting the ll and z parameters from your Gmap4 link.
http://www.mappingsupport.com/p/gmap4_whats_new.html

2.  Example page
Scroll down to the section titled “Your map data saved in the Gmap4 link”.  The examples range from basic to advanced and give you a quick way to see some of the kinds of maps you can make with this feature.
http://www.mappingsupport.com/p/gmap4_examples.html

3.  Help file
You can download the PDF file and search it (control-f) for the section titled “Make a custom map with Gmap4 and save it”.
http://www.mappingsupport.com/p/gmap4_help.pdf

Joseph, the Gmap4 guy
Redmond, WA
Title: Re: Gmap4 - An enhanced Google Map viewer
Post by: RichardM on March 22, 2013, 04:36:36 PM
Cool upgrade. Here's a rough view of the new Emory Peak trail overlaid onto the My Topo map which shows the old trail:

New Emory Peak Trail (http://www.mappingsupport.com/p/gmap4.php?ll=29.2494,-103.300176&t=t2&z=16&label=on&markers=line=on linesymbol=on||29.251686,-103.297298^1^<em>1</em><br />29.251686,-103.297298||29.251321,-103.296783^2^<em>2</em><br />29.251321,-103.296783||29.25046,-103.296772^3^<em>3</em><br />29.25046,-103.296772||29.250113,-103.296611^4^<em>4</em><br />29.250113,-103.296611||29.250375,-103.296107^5^<em>5</em><br />29.250375,-103.296107||29.250422,-103.29571^6^<em>6</em><br />29.250422,-103.29571||29.249992,-103.295517^7^<em>7</em><br />29.249992,-103.295517||29.249739,-103.295517^8^<em>8</em><br />29.249739,-103.295517||29.248812,-103.295227^9^<em>9</em><br />29.248812,-103.295227||29.248662,-103.295592^10^<em>10</em><br />29.248662,-103.295592||29.248868,-103.29645^11^<em>11</em><br />29.248868,-103.29645||29.249252,-103.297008^12^<em>12</em><br />29.249252,-103.297008||29.249205,-103.297663^13^<em>13</em><br />29.249205,-103.297663||29.248971,-103.298103^14^<em>14</em><br />29.248971,-103.298103||29.248634,-103.298285^15^<em>15</em><br />29.248634,-103.298285||29.248232,-103.298371^16^<em>16</em><br />29.248232,-103.298371||29.24781,-103.298596^17^<em>17</em><br />29.24781,-103.298596||29.247342,-103.298328^18^<em>18</em><br />29.247342,-103.298328||29.247272,-103.298457^19^<em>19</em><br />29.247272,-103.298457||29.247385,-103.298526^20^<em>20</em><br />29.247385,-103.298526||29.247445,-103.298644^21^<em>21</em><br />29.247445,-103.298644||29.247801,-103.298875^22^<em>22</em><br />29.247801,-103.298875||29.247979,-103.298848^23^<em>23</em><br />29.247979,-103.298848||29.248428,-103.299025^24^<em>24</em><br />29.248428,-103.299025||29.248611,-103.299304^25^<em>25</em><br />29.248611,-103.299304||29.24848,-103.299905^26^<em>26</em><br />29.24848,-103.299905||29.248517,-103.300184^27^<em>27</em><br />29.248517,-103.300184||29.248658,-103.300442^28^<em>28</em><br />29.248658,-103.300442||29.24863,-103.300683^29^<em>29</em><br />29.24863,-103.300683||29.248513,-103.300903^30^<em>30</em><br />29.248513,-103.300903||29.248456,-103.301225^31^<em>31</em><br />29.248456,-103.301225||29.248377,-103.301466^32^<em>32</em><br />29.248377,-103.301466||29.248297,-103.301353^33^<em>33</em><br />29.248297,-103.301353||29.248222,-103.300763^34^<em>34</em><br />29.248222,-103.300763||29.248096,-103.300307^35^<em>35</em><br />29.248096,-103.300307||29.24789,-103.299728^36^<em>36</em><br />29.24789,-103.299728||29.24774,-103.29946^37^<em>37</em><br />29.24774,-103.29946||29.247651,-103.299422^38^<em>38</em><br />29.247651,-103.299422||29.247502,-103.299519^39^<em>39</em><br />29.247502,-103.299519||29.247441,-103.299653^40^<em>40</em><br />29.247441,-103.299653||29.24752,-103.299878^41^<em>41</em><br />29.24752,-103.299878||29.247651,-103.300071^42^<em>42</em><br />29.247651,-103.300071||29.247648,-103.300113^43^<em>43</em><br />29.247648,-103.300113||29.247385,-103.300323^44^<em>44</em><br />29.247385,-103.300323||29.247286,-103.300517^45^<em>45</em><br />29.247286,-103.300517||29.247239,-103.300796^46^<em>46</em><br />29.247239,-103.300796||29.247132,-103.301015^47^<em>47</em><br />29.247132,-103.301015||29.247141,-103.301332^48^<em>48</em><br />29.247141,-103.301332||29.247179,-103.301488^49^<em>49</em><br />29.247179,-103.301488||29.247127,-103.301842^50^<em>50</em><br />29.247127,-103.301842||29.246982,-103.302249^51^<em>51</em><br />29.246982,-103.302249||29.246893,-103.30278^52^<em>52</em><br />29.246893,-103.30278||29.246776,-103.303204^53^<em>53</em><br />29.246776,-103.303204||29.24679,-103.303488^54^<em>54</em><br />29.24679,-103.303488||29.246818,-103.303607^55^<em>55</em><br />29.246818,-103.303607||29.246823,-103.303816^56^<em>56</em><br />29.246823,-103.303816||29.246846,-103.303934^57^<em>57</em><br />29.246846,-103.303934||29.246729,-103.30439^58^<em>58</em><br />29.246729,-103.30439||29.246608,-103.304642^59^<em>59</em><br />29.246608,-103.304642||29.246537,-103.304915^60^<em>60</em><br />29.246537,-103.304915||29.246453,-103.30491^61^<em>61</em><br />29.246453,-103.30491||29.246069,-103.30498^62^<em>62</em><br />29.246069,-103.30498||29.246027,-103.305125^63^<em>63</em><br />29.246027,-103.305125||line=off)
(same map, but without labels) (http://www.mappingsupport.com/p/gmap4.php?ll=29.2494,-103.300176&t=t2&z=16&label=off&markers=line=on linesymbol=off||29.251686,-103.297298^1^<em>1</em><br />29.251686,-103.297298||29.251321,-103.296783^2^<em>2</em><br />29.251321,-103.296783||29.25046,-103.296772^3^<em>3</em><br />29.25046,-103.296772||29.250113,-103.296611^4^<em>4</em><br />29.250113,-103.296611||29.250375,-103.296107^5^<em>5</em><br />29.250375,-103.296107||29.250422,-103.29571^6^<em>6</em><br />29.250422,-103.29571||29.249992,-103.295517^7^<em>7</em><br />29.249992,-103.295517||29.249739,-103.295517^8^<em>8</em><br />29.249739,-103.295517||29.248812,-103.295227^9^<em>9</em><br />29.248812,-103.295227||29.248662,-103.295592^10^<em>10</em><br />29.248662,-103.295592||29.248868,-103.29645^11^<em>11</em><br />29.248868,-103.29645||29.249252,-103.297008^12^<em>12</em><br />29.249252,-103.297008||29.249205,-103.297663^13^<em>13</em><br />29.249205,-103.297663||29.248971,-103.298103^14^<em>14</em><br />29.248971,-103.298103||29.248634,-103.298285^15^<em>15</em><br />29.248634,-103.298285||29.248232,-103.298371^16^<em>16</em><br />29.248232,-103.298371||29.24781,-103.298596^17^<em>17</em><br />29.24781,-103.298596||29.247342,-103.298328^18^<em>18</em><br />29.247342,-103.298328||29.247272,-103.298457^19^<em>19</em><br />29.247272,-103.298457||29.247385,-103.298526^20^<em>20</em><br />29.247385,-103.298526||29.247445,-103.298644^21^<em>21</em><br />29.247445,-103.298644||29.247801,-103.298875^22^<em>22</em><br />29.247801,-103.298875||29.247979,-103.298848^23^<em>23</em><br />29.247979,-103.298848||29.248428,-103.299025^24^<em>24</em><br />29.248428,-103.299025||29.248611,-103.299304^25^<em>25</em><br />29.248611,-103.299304||29.24848,-103.299905^26^<em>26</em><br />29.24848,-103.299905||29.248517,-103.300184^27^<em>27</em><br />29.248517,-103.300184||29.248658,-103.300442^28^<em>28</em><br />29.248658,-103.300442||29.24863,-103.300683^29^<em>29</em><br />29.24863,-103.300683||29.248513,-103.300903^30^<em>30</em><br />29.248513,-103.300903||29.248456,-103.301225^31^<em>31</em><br />29.248456,-103.301225||29.248377,-103.301466^32^<em>32</em><br />29.248377,-103.301466||29.248297,-103.301353^33^<em>33</em><br />29.248297,-103.301353||29.248222,-103.300763^34^<em>34</em><br />29.248222,-103.300763||29.248096,-103.300307^35^<em>35</em><br />29.248096,-103.300307||29.24789,-103.299728^36^<em>36</em><br />29.24789,-103.299728||29.24774,-103.29946^37^<em>37</em><br />29.24774,-103.29946||29.247651,-103.299422^38^<em>38</em><br />29.247651,-103.299422||29.247502,-103.299519^39^<em>39</em><br />29.247502,-103.299519||29.247441,-103.299653^40^<em>40</em><br />29.247441,-103.299653||29.24752,-103.299878^41^<em>41</em><br />29.24752,-103.299878||29.247651,-103.300071^42^<em>42</em><br />29.247651,-103.300071||29.247648,-103.300113^43^<em>43</em><br />29.247648,-103.300113||29.247385,-103.300323^44^<em>44</em><br />29.247385,-103.300323||29.247286,-103.300517^45^<em>45</em><br />29.247286,-103.300517||29.247239,-103.300796^46^<em>46</em><br />29.247239,-103.300796||29.247132,-103.301015^47^<em>47</em><br />29.247132,-103.301015||29.247141,-103.301332^48^<em>48</em><br />29.247141,-103.301332||29.247179,-103.301488^49^<em>49</em><br />29.247179,-103.301488||29.247127,-103.301842^50^<em>50</em><br />29.247127,-103.301842||29.246982,-103.302249^51^<em>51</em><br />29.246982,-103.302249||29.246893,-103.30278^52^<em>52</em><br />29.246893,-103.30278||29.246776,-103.303204^53^<em>53</em><br />29.246776,-103.303204||29.24679,-103.303488^54^<em>54</em><br />29.24679,-103.303488||29.246818,-103.303607^55^<em>55</em><br />29.246818,-103.303607||29.246823,-103.303816^56^<em>56</em><br />29.246823,-103.303816||29.246846,-103.303934^57^<em>57</em><br />29.246846,-103.303934||29.246729,-103.30439^58^<em>58</em><br />29.246729,-103.30439||29.246608,-103.304642^59^<em>59</em><br />29.246608,-103.304642||29.246537,-103.304915^60^<em>60</em><br />29.246537,-103.304915||29.246453,-103.30491^61^<em>61</em><br />29.246453,-103.30491||29.246069,-103.30498^62^<em>62</em><br />29.246069,-103.30498||29.246027,-103.305125^63^<em>63</em><br />29.246027,-103.305125||line=off)

I did this by selecting my points using the "m - Street Map Google" map, then switching over to "t2 My Topo" before saving the link.

A question: Is there something I'm missing or can you not edit the map once it has been saved? I tried opening it in a separate browser and it doesn't want to let me edit it.
Title: Re: Gmap4 - An enhanced Google Map viewer
Post by: Jelf on March 22, 2013, 04:51:45 PM
A question: Is there something I'm missing or can you not edit the map once it has been saved? I tried opening it in a separate browser and it doesn't want to let me edit it.

Correct.  Presently there is no way to make a Gmap4 link like you did and then open that link in a new browser tab and edit your data.

When you open your link in a new tab, it is read-only.

Hopefully next winter when the monsoons return I can find time to add an edit feature.

Joseph
Title: Re: Gmap4 - An enhanced Google Map viewer
Post by: RichardM on March 22, 2013, 04:57:46 PM
A question: Is there something I'm missing or can you not edit the map once it has been saved? I tried opening it in a separate browser and it doesn't want to let me edit it.

Correct.  Presently there is no way to make a Gmap4 link like you did and then open that link in a new browser tab and edit your data.

When you open your link in a new tab, it is read-only.

Hopefully next winter when the monsoons return I can find time to add an edit feature.

Joseph
Fair enough. In the meantime, the url itself is editable, so any minor tweaks can be done manually.
Title: Re: Gmap4 - An enhanced Google Map viewer
Post by: Jelf on June 14, 2013, 10:04:51 PM
Some of you already know that Gmap4 is a general purpose file viewing tool for GPX, TPO, KML, KMZ and a couple of other file types.

I have posted beta version 934 (June 13th) that lets Gmap4 also be a general purpose WMS viewer.  Why might you care?  At last count there were approximately 1.2 bazillion WMS servers out there and this beta code can display most of that data.  Specifically, you can:

* Build a Gmap4 link to display multiple layers from multiple WMS servers
* Turn transparent layers on/off one at a time or all together
* Change the stacking order of transparent layers
* Display transparent layers on top of any basemap hardcoded into Gmap4 or on top of any basemap added via WMS

As a software developer, it is always exciting to develop a feature that is first-of-its-kind.  If there is any other software that lets you "click link - see WMS data", I would like to know about it.

For example, here is a link that starts the Gmap4 beta code and displays a basemap which is the Google aerial centered near Denver and a WMS overlay showing the boundaries of federally owned land.  Zoom in for more detail.  This boundary data covers the USA.  A fast way to shift the map to your own area is Menu ==> Search.
http://www.mappingsupport.com/p/beta/gmap4_beta_934.php?ll=39.740986,-104.996338&t=h,Public_land&z=8&markers=||title=<div%20style="font-weight:bold;">Federal%20Land<br%20/>Boundaries<br%20/><a%20href="http://wildfire.cr.usgs.gov/arcgis/services/geomac_dyn/MapServer/WMSServer?request=GetLegendGraphic&version=1.3.0&format=image/png&layer=1"%20target="_blank">Map%20key</a><br%20/><a%20href="http://www.geomac.gov/index.shtml"%20target="_blank">Data%20source</a><br%20/><a%20href="http://www.mappingsupport.com/p/gmap4_about_wms_map.html"%20target="_blank">About%20this%20map</a></div>&wms=http://wildfire.cr.usgs.gov/ArcGIS/services/geomac_dyn/MapServer/WMSServer?layers=1&transparent=true&name=Public_land (http://www.mappingsupport.com/p/beta/gmap4_beta_934.php?ll=39.740986,-104.996338&t=h,Public_land&z=8&markers=||title=<div%20style="font-weight:bold;">Federal%20Land<br%20/>Boundaries<br%20/><a%20href="http://wildfire.cr.usgs.gov/arcgis/services/geomac_dyn/MapServer/WMSServer?request=GetLegendGraphic&version=1.3.0&format=image/png&layer=1"%20target="_blank">Map%20key</a><br%20/><a%20href="http://www.geomac.gov/index.shtml"%20target="_blank">Data%20source</a><br%20/><a%20href="http://www.mappingsupport.com/p/gmap4_about_wms_map.html"%20target="_blank">About%20this%20map</a></div>&wms=http://wildfire.cr.usgs.gov/ArcGIS/services/geomac_dyn/MapServer/WMSServer?layers=1&transparent=true&name=Public_land)

The Gmap4 beta page has more examples and documentation showing step-by-step how to make your own Gmap4 links to display any WMS data you wish to see.
http://www.mappingsupport.com/p/gmap4_beta.html

The example maps on the beta page include:
* USA map with current weather radar
* NOAA coastal navigation charts including the most detailed charts
* Current forest fire boundaries
* Index to 1:24,000 scale topos for USA
* Index to 1:50,000 scale topos for Canada
* and more

There might be some kind of limit as to how complex(?) these maps can be.  Gmap4 uses the Google map API but Google’s docs do not mention any such limit.

I would enjoy seeing any cool way you use this feature.

Also, while I am happy to answer questions please help me help you by first reading the information on the beta page.  That information will answer a great many questions.

Joseph, the Gmap4 guy
Redmond, WA
Title: Gmap4 = View topos/aerials *offline* and your geolocation
Post by: Jelf on September 25, 2014, 02:48:32 PM
I have posted here before about Gmap4 which is an enhanced Google map viewer that I developed.  Up until this summer I believed that Gmap4 would not work if your mobile browser was offline.

I was wrong.

If you follow a few simple instructions, many (but not all) of the Gmap4 features will work just fine on a smartphone, tablet or other mobile device when you are offline.  Among other things, when you are offline you can:
* Look at high resolution topo maps (t4 Topo High)
* Look at Google aerials
* Look at other basemaps
* Look at GIS overlays
* Turn on the geolocation feature (Menu ==> My location) and see the map become centered where you are standing
* Move and watch the location symbol follow you and the map automatically move as needed
* Touch the location symbol and see your coordinates in the current coordinate format
* Change the coordinate format
* Turn on/off a UTM grid
* Turn on/off a USNG grid

Yes, you can do all of the above while the browser in your smartphone or tablet is offline.  Now let’s pop the hood and see how this works.

Any map you see with Gmap4 consists of a bunch of small image files called “tiles” that are stitched together to cover your screen.  When you look at a map while you are online, a copy of each image file is saved in the browser’s cache.  If you keep the browser tab open that has the Gmap4 map, then you can then go offline and still pan the map over the area for which there are map tiles in the browser’s cache.  If you pan too far, the screen will be white.

To read plain English instructions that I guarantee you will understand (I don’t know how to write computer babble-speak) please visit the Gmap4 Help page and download the pdf file “How To Use Gmap4 Offline”.
Help page: http://www.mappingsupport.com/p/gmap4_help.html

Gmap4 default map: http://www.mappingsupport.com/p/gmap4.php

Joseph, the Gmap4 guy
Title: Re: Gmap4 - An enhanced Google Map viewer
Post by: RichardM on August 27, 2018, 08:36:55 PM
Quote from: https://mappingsupport.com/p/gmap4.php
Gmap4 (2009 - 2018)

Thank you everyone who had a kind word to say about Gmap4 since I launched it in 2009. Gmap4 had a good run. However due to policy changes at Google, Gmap4 is shutting down for most users as of this evening, July 15, 2018.
Well, foo. There's no telling how many times I've used and posted maps using this tool.
Title: Re: Gmap4 - An enhanced Google Map viewer
Post by: Jelf on August 27, 2018, 09:46:16 PM
Not to worry.

I am building GISsurfer which will replicate most of the Gmap4 features.  GISsurfer is based on the free open-source Leaflet map API (Application Program Interface).

The first version of GISsurfer - with limited features - will go 'live' sometime in September.  A good way to hear when that happens is to follow me on twitter.  @mappingsupport