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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.

PolyGeo
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Johnson
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  • Does this Q&A help? http://gis.stackexchange.com/questions/150103/deleting-polygon-defined-area-from-raster-layer-in-arcgis-for-desktop It sounds to me like it may be the same as what you are asking. – PolyGeo Jul 30 '15 at 07:08

1 Answers1

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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).

PolyGeo
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vpgcloud
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  • 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 07:12
  • In that case I would first buffer the study area layer and then use the result of that as a mask. – vpgcloud Jul 31 '15 at 10:39