TransDEM Forum

I was writing something useful here with long descriptions, but Firefox crashed, so I'll just leave some Russian GIS resource links with short descriptions

http://www.maps.yandex.ru - Yandex Maps, useful for mapping large Russian cities where Google maps fall short, Russian

http://www.sasgis.ru - SASGIS/SAS.Planet A very useful Russian enthusiast GIS resource, it holds News on and around GIS themes, a Russina/Engish tool called SAS.Planet with constantly updating zmp maps and a Russian enthusiast GIS forum.

http://www.kosmosnimki.ru - Professional Russian GIS resource for purchasing of Satellite images, no registration required for preview.

http://www.etomesto.ru/ - Eto Mesto (This Place) A great resource for old maps and images of Moscow and it's surroundings. Great for building old Russian routes and archeological digouts

Cheers and Enjoy I'll add more later, when my browser isn't acting up like this.

From Moscow With Love

Damien

Damien_Zhar wrote: http://www.maps.yandex.ru - Yandex Maps, useful for mapping large Russian cities where Google maps fall short, Russian

Thanks to Damien_Zhar's hint some time ago I added support for Yandex Maps in TransDEM 2.0. At first glance it looked like being a standard Map Tile system but it wasn't. Further investigations revealed that the projection is ellipsoidal there, not spherical as on the other map tile systems. That's why you need at least TransDEM 2.0 to access these maps.

geophil wrote:

Damien_Zhar wrote: http://www.maps.yandex.ru - Yandex Maps, useful for mapping large Russian cities where Google maps fall short, Russian

Thanks to Damien_Zhar's hint some time ago I added support for Yandex Maps in TransDEM 2.0. At first glance it looked like being a standard Map Tile system but it wasn't. Further investigations revealed that the projection is ellipsoidal there, not spherical as on the other map tile systems. That's why you need at least TransDEM 2.0 to access these maps.

Happy to help dear Geophil, I added some more links you could have a peek at. Usually I use Yandex Map for my Russia projects, but lately OSM has gotten quite the detailed covering. And if old maps interest you, well all links I could come over have been added there. I just wish Google would release height data for Oslo as seen in Google Earth, I bet it's a 5 meter or 10 meter grid.

Just writing a little update on Yandex Sat and Map image version. The new versions are for Map and for the Orthophotoes. All is written into the Settings window under 'Map Tile Servers" window.\

PS! The Open Street Map could be modified to show a max of 18 zoom levels instead of 17.

Cheers
Damien

Note taken. Thanks a lot.

geophil wrote:Note taken. Thanks a lot.

You are welcome dear Geophil. And if you want to find out further information about the map version it is easy. I use Google Chrome and open maps.yandex.ru then I press "Inspect Element" and then navigate to the "Resources" tab until I find the mapbits all in order. Just have to look at the mouseover popup to learn it's source. Sounds a little complicated, I'm sorry.

I just found a big collection of GIS data on a portal that can be interfaceable with TransDEM and it's located here http://geoportal.ntsomz.ru/
Free registration required for maximum benefits. It has a lot of rare data from Russia and around the world.

Dear Geophil, you can safely edit the Yandex map data to be of with no change to the max. zoom level and the orthophotos to with a change to the max. zoom level up to nineteen - 19

Cheers
Damien

Thanks.

The max zoom level should be uncritical for most map tile implementations now. In the past at least one provider chose to define it the other way round, with the max zoom level encoded being 0.

No by all means, I don't know how they code and decode zoom levels. But I know if I set the max zoom level to 16 the 17th level will give me a black picture, even if it is present in the source. So I experiment with the max zoom level. I tend to keep it around twenty for best coverage in all maps and ortophotos.

geophil wrote:Thanks.

The max zoom level should be uncritical for most map tile implementations now. In the past at least one provider chose to define it the other way round, with the max zoom level encoded being 0.