Windows maps download tool for MapThis! by in7ane

**in7ane** · February 6th, 2007, 13:27

MIB.42, Google tile coordinates start from the dateline - so you can not have a map that spans it. The solution would be to either use the full world map (Advanced, zoom=16, x=0, y=0, minzoom=10) and uncheck the other areas (then you will jump from the left of the map to the right as you cross the dateline. Or to use two maps (upto, and from the dateline).

Keep in mind that it may be a good idea to ask cabin crew about using a GPS receiver, especially before pulling out some custom made cables mid flight and sticking a receiver next to the window.

http://216.239.59.104/search?q=cache...efox-a&strip=0

**MIB.42** · February 6th, 2007, 16:02

Originally Posted by in7ane

MIB.42, Google tile coordinates start from the dateline - so you can not have a map that spans it. The solution would be to either use the full world map (Advanced, zoom=16, x=0, y=0, minzoom=10) and uncheck the other areas (then you will jump from the left of the map to the right as you cross the dateline. Or to use two maps (upto, and from the dateline).

Keep in mind that it may be a good idea to ask cabin crew about using a GPS receiver, especially before pulling out some custom made cables mid flight and sticking a receiver next to the window.

http://216.239.59.104/search?q=cache...efox-a&strip=0

Thanks, but can you please try it, the Google Insert and the Preview is quite different at that level. I found it impossible - or at least hard enough not to succeed - to have the whole map.

For the wrap around issue, I guess it would not be a big issue to stitch the map and wrap the coords, but I guess this would be a mundane extra code as there is no stuff there, so this is fine too, you are right...

Also, can you please explain - or point me to a direction - the GPSFS format you are using? I have some coding experience with images ( like color reduction etc. )...

Thank you for the airlines info.

**in7ane** · February 6th, 2007, 16:39

MIB.42, to get maps that are that zoomed out you are better off specifying the zoom,x,y values by hand under Advanced (click Show Preview to see the area).

You can change GMDL to stitch the Google Map source by changing bPF_Click() here: GetThreadTile(new Object[] { the_zoom, Zx + fil_col, Zy + dir_row, full_file_name });

or Google Satellite and MSN wrap automatically.

However - I suspect it will not work as expected in Map This! when translating tiles to lat/lon and back - you will need to review getLatLong() and getTileCoord in main.cpp I think.

GPSFS: http://en.wikibooks.org/wiki/Map_This!#GPSFS is a bit of an overview, keep in mind the file span change note. But what you really want is CreateGPSFS() in GPSFS.cs

With colour reduction - my initial plan was to take a look at PNGCRUSH, PNGGaunlet / PNGOut but I settled on assuming that Google have already optimized their tiles. Let me know if you come up with anything useful though.

-

I can confirm that you end up with E235 in Map This! (180 + (180 - 125W)) for the west cost if you stitch the map accross the dateline - making the map unusable beyond the E180 boundary.

**pooka** · February 7th, 2007, 07:47

Google chinese map is OK now for Mapthis 0.4/0.46.
(http://ditu.google.cn).

deniska/in7ane, it's easy to integrate it into gmdl, you could add an entry of mapabc(or name it googlecn)

I made a modified version of gmdl 0.42 and test maps, follow this post to get:

http://www.moby.cn/bbs/viewtopic.php?t=30

I have test it through Holux 236, 20 meter drift

bad news. Need much more test.

Gpsper

**in7ane** · February 7th, 2007, 10:41

http://www.in7ane.com/psp/gmdl0.4.3b.zip

Changes:

(1)
http://ditu.google.cn support, with native navigation and GPS support (thanks to pooka for the heads up). GPS may be off right now (w2.37) but I would expect them to re-render the tiles as if GPS is not accurate - neither are their search results on screen. (converts the GIFs to PNGs)

(2)
The zoomX in the detail selection now matches the folder names (top is 1x - the most zoomed in level, bottom is Nx - the 2x2 most zoomed out level).

(3)
Thailand with GPS support (Chang Mai, Phuket, and Bangkok) added as sources from:

http://www.thaitcc.ws/LZ_TTCC

chang mai
6,1586,914

phuket
7,791,488

http://www.moffle.com

bangkok
8,398,235
min 1 not 0

Requests:

(1)
Feedback on how accurate the Thai sources are.

(2)
If anyone has experience in dealing with Russian government agencies - the acquisition of Russian geodata - which I believe is open according to current laws (I'm in for a couple of hundred bucks if they have cd burning fees like the regions: http://www.sibgi.ru/price.htm):

http://www.inforeg.ru/db/db.asp?id=89 from http://www.roskart.gov.ru

http://www.inforeg.ru/db/db.asp?id=6571 looks like what Google may have used to get the building outlines and numbers in Moscow

If acquired, in addition to using it for geodata.dat files for Map This!, I would also plan to process and contribute it to http://www.openstreetmap.org

**wildon** · February 7th, 2007, 11:35

Thanks buddy for the new release.. U rock

**bootspsp** · February 7th, 2007, 13:03

I will be in thailand in a week if all goes well so i will try out the gps290 and let you know what it is like....

**zsc** · February 7th, 2007, 15:02

Same here, i'm going back to thailand in about a month or so. I'll give it a try once i'm there. By the way in7ane, are you Thai?

**MIB.42** · February 7th, 2007, 18:23

in7ane, maybe it's already there, if not, can you please give an option disabling the deletion of the downloaded jpgs, so I can process them at a later time? I guess the "No GPSFS" checkbox only downloads the images, right?

I was downloading a rather large set ( I was downloading for 2 days! ) and this morning when I checked on it, the directory was empty and I had a big red warning dialog from windows about some problem with the gmdl ( or referred ) code ( typical error message for memory corruption ).

I am going to start the download again, but is there any way of avoiding this in the future? Your insight is appreciated.