Hi KevinKun.
I want to ask you a DETAIL of this extension or if you know about this.
I have searched in generally and i didn't find any solution for this.
If you want to make "a contours maps" app, not google or microsoft, provide a way to make it from what i search it.
Do you know if bing let you download or make it (but not showed in public but in the detail of the apis for the maps?
I search in yandex and i didn't find how to do it too.
I know, the google maps let you do it, LONG AGO, but now i cannot find a way to do it.
The contours lines are lines of same ALTITUDE and the utility is for Geography-Geology and Military, maybe there are other uses but this are all i know for sure.
I want it for academical geological uses.
Any help you provide will be welcome.
Thanks.