Contours and hill shading : minimum instructions needed

[necarnot]

Hello,

I've read the Makefile and tried to understand the dirty notes about contours and hill shading, but though I've downloaded the DEM files of some relevant zones, I don't know how to use this make file, as I don't know which make target I must call, neither where to put the DEM files.
As written in SHADING_AND_CONTOURS.md, the documentation has to be improved and I'm OK to try to improve it, but I may need some starting point, which I'm missing at present.

Thank you.

Nicolas

[zdila]

Many depends on the properties of data you have. But basically you should have DEM data geotiff transformed to EPSG:3857 and save it to build/merged.tif and then run make -j 4 build/final.tif.ovr.