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Greetings, I need to digitize an "out" area in a forest vegetation polygon. The ArcGIS help directions are as follows: Cutting donut holes in existing polygons You can cut holes in existing polygon features to create a donut polygon. Open the Snapping Environment dialog box and turn on snapping for edit sketch vertices. The check box is at the bottom of the dialog box. With edit sketch snapping, you can better construct a closed boundary defining the area you want to remove. Set the task to Cut Polygon Features. Click the Sketch tool . Sketch the area you want to remove. Make sure the end vertex snaps to the first one, so you end up with a closed polygon. Finish the sketch. You now have two polygons. Select only the inner polygon and press the Delete key. I cannot select the sketch tool when I have the task set to "Cut Polygon Features". Any suggestions? Thanks, TB
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11-17-2011
06:09 AM
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Thank you Eric, the mosaic dataset was clearly the solution. This raster layer will overlay (at some level of transparency) a hillshade. The overlap was a visible seam in the transparency.
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09-30-2011
02:15 PM
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Greetings, I download 1/3 arc second and 1 arc second NED raster data from the USGS seamless server and the images have a slight overlap, they call it about six pixels. Anybody have a slick trick for removing that overlap from two adjacent images? Thanks! TB.
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09-28-2011
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