I have a clipped DEM of my study area in ArcGIS Desktop 9.3 which I want to use for SWAT project set-up, but I need to mask it.

How do I go about it?

I'm new to the use of ArcGIS.

I don't want to use the extract by mask option.


It is unclear why you don't want to use the extract by mask option.

The only other way I know of is to set the mask through the environment settings:

ArcGIS Help 10.1 - Mask (Environment setting).

  • I don't want to use extract by mak because I want the mask to be a little bit bigger than the study area. – Johnson Jul 31 '15 at 7:12
  • In that case I would first buffer the study area layer and then use the result of that as a mask. – Vipr Jul 31 '15 at 10:39

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