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| GeoCommunity Mailing List |
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| Mailing List Archives |
| Subject: | [gislist] Raster Image Woes |
| Date: |
12/12/2003 11:30:01 AM |
| From: |
Michele Mattix |
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Hi Everyone --
I have a bunch of raster images which piece together to cover the state of
CO with veg data. The problem I'm having is that each individual image
consists of a rectangle despite the fact that the veg data it portrays is
not a rectangle -- each one has a unique shape. The area around that unique
shape and out to the edges of the rectangle is black. So, when I lay the
files out, the black parts overlap and leave me with an illegible map.
Is there some way to clip away the black part of the image so that only the
colored data show? I'm using ArcGIS 8.3 and I do have Spatial Analyst
(though I'm a novice). Also, is there a name for the black part of the
raster image?
Thanks,
Michele
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