100 m contours for South Asia generated using a raster derived from SRTM data. Contours were interpolated with QGIS GDAL plugin. The contours have been slightly simplified with mapshaper and this process may have introduced some contour line crossings especially in the Tibetan plateau. This is a good indicator of the roughness of the land - contours at closer distances indicate steeper slopes.
Own work
Shyamal