Re: how can measure general slope, aspect and heig... - Esri Community

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For "general slope and aspect" I'd generate an elevation trend surface from your DEM (masked to your polygon):

Clip and mask your DEM to the polygon then convert the masked DEM to points, or...

Create Random Points constrained by your landslide polygon which you can use to sample the elevation values.

Then

Generate the elevation trend surface from those points and then calculate slope and aspect from that.

Repeat 300 times (batch or script)