What does that mean?  Aspect is the compass direction of a line perpendicular to the slope face.  It has utility for solar power, geomorphic stability, soil development, vegetation cover, etc.  This can be learned from a grid or a TIN. As shown below for the Muary_zoom DEM.
The topography with 20 ft contours applied. 

Here's aspect with the legend that ESRI uses. But I don't like it.Too many colors 

Here's one I created with a different color ramp that is continuous. 

catégorie GIS Lessons







