gMapMaker/Google terrain map failure

mpgrady

I apologize if this should go into a different section,
this is my first post.

I've been using the gMapMaker utility to download Google terrain
maps that match USGS DRG topo quadrangles, 1/8 degree
(7.5 minute maps @ 1:24000). For a long time I had no problems,
zero difficulties, in doing this. Suddenly, I get no data.
My MGMaps cache shows no data and the TIF of area I've downloaded
shows as blank.

I'm trying to get a Google terrain map image at zoom 15 with an output
of TIF and an Ozi calibration map.

How do I tell if Google is blocking my address? It sure looks like
something is downloading, all sorts of activity in the download
dialog box but in the end, nothing.

My version of gMapMaker is the current 0.7.3.1.
I've got a fast connection at the university, XP Pro, blah, blah.
Attempts on different computers yield the same, empty, results.
Thanks
Michael Grady

frankv · Junior Joined: 28 Sep 2009 Posts: 4 Phone Type: Unknown

Sorry, I can't help... I have the same problem. I'm also on the latest gMapMaker, XP Pro, good bandwidth, etc.

I got most of the tiles for a map area from Google (with some blanks), now I get nothing. I can still look at the same area of the map with Google Earth just fine.

So I have the same question: How do I tell if Google is blocking my address?

I thought I would try Microsoft Satellite images instead... according to another post you don't get blocked there if you have a 2000ms delay. But I don't get anything at all. The folders are created in the cache directory, but no files. I've tried various zoom levels from 0-4, 8, 9, 12 with no luck. Again, I can see the same area with Bing Maps just fine.

Very frustrating... thanks in advance for any help!

Frank

mpgrady · Posted: Tue Sep 29, 2009 6:18 pm Post subject:

I'm concluding that Google has changed its location for the terrain map
data and the software author is unaware of that.

gMapMaker seems to download the Google map, Google satellite, and
Google hybrid data perfectly fine but not the Google terrain data at all.

Too bad, I really benefited from the terrain data with Ozi calibration
already created.

mpgrady

Cristian Streng · Posted: Tue Sep 29, 2009 6:25 pm Post subject:

frankv · Junior Joined: 28 Sep 2009 Posts: 4 Phone Type: Unknown

Well, the MSN Satellite thing worked perfectly from my home PC.

My conclusion is that the problem is something to do with our work proxy server / gateway. I'm guessing that Michael's university probably has the same kind of setup.

Presumably gMapMaker gets its proxy information from how IE is set up. I tried changing my IE setup from "Automatically detect proxy" to the correct proxy server and port, but that didn't seem to help Sad

Is there any chance to see the source code for gMapMaker to see exactly what it does? And add in some diagnostics and error logging and stuff?

<disclaimer>Not that I would be doing this kind of stuff from work, of course. Wink

</disclaimer>

mpgrady · Posted: Tue Sep 29, 2009 7:44 pm Post subject:

Woo-hoo!

I thank Mr Streng for his attention to this problem.

mpgrady

Cristian Streng · Posted: Wed Sep 30, 2009 5:00 am Post subject:

mpgrady · Posted: Wed Sep 30, 2009 9:34 pm Post subject:

gMapMaker has returned to its earlier wonderful functionality
with the new v0.7.3.2
Thank you

frankv · Junior Joined: 28 Sep 2009 Posts: 4 Phone Type: Unknown

Thanks Cristian... found the source code Embarassed

and have been fiddling with it a little (and then finding you had already done what I wanted Embarassed

) An interesting first foray into C#

Works fine for me too Very Happy

A couple of minor ideas:
1. The link at http://www.mgmaps.com/cache/ still shows v0.7.3.1

2. Output the url as well in the Debug.Writeline statement in line 339 of TileDownloader.cs

3. Shouldn't that line be bracketed by a #if DEBUG #endif ?? Or should the code at lines 130-134 of progressWindow.cs be always compiled?

4. When you get banned, Google sends back a 403 status. For people not using the proxy list, it would be worth detecting this and stopping the download attempts immediately.

5. When you get banned, trying to view Google satellite images at other web sites fails. But the Google Earth client program continues to work without problem. Can gMapMaker impersonate the Google Earth client?

Cristian Streng · Posted: Tue Oct 06, 2009 6:33 pm Post subject:

bbatbayar · Posted: Tue Nov 30, 2010 9:30 am Post subject: Google Terrain Map - Fixed

I just found a way to fix this problem.
Just make following changes in GoogleTerURL section of gMapMaker.exe.config file:

Original
<setting name="GoogleTerURL" serializeAs="String">
<value>http://mt{GOOG_DIGIT}.google.com/vt/lyrs=t@108,r@121&hl=en&x={X}&y={Y}&z={ZOOM}&s={GALILEO}</value>
</setting>

Modified
<setting name="GoogleTerURL" serializeAs="String">
<value>http://mt{GOOG_DIGIT}.google.com/vt/lyrs=t@125,r@130&hl=en&x={X}&y={Y}&z={ZOOM}&s={GALILEO}</value>
</setting>

Yeah, that's it!!!
I tested this fix on GoogleTerrain Zoom12. Post everyone who tested on higher zoom, please.

JDM_DSM · Junior Joined: 30 Nov 2010 Posts: 3 Phone Type: Unknown

Awesome, your fixed appears to have worked for me as well.
How did you come by the new url to put in the config file?

Wingnut · Newbie Joined: 09 Feb 2011 Posts: 2 Phone Type: Unknown

Did the fix to the config file in the programs directory but I still get blank files (tried Z12 and Z15).

Any other ideas?

franc · Posted: Mon May 16, 2011 6:51 am Post subject: