quick draft / reminder about specs .

DEM FEED
* select a dem
* create datas from dem

•  a topographic image
•  an array stamp
•  get datas info from the dem

* save the data in a file

•  can create a directory

DEM SELECT
* select a dem
* show image
* show information

DEM VIEW
* select a chunk
* camera move
* limiting to one dem . ( not passing from one dem to the other ) .