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Hello all,
I was wondering the best way to create a lake polygon in ArcMap using a 5m DEM. In my area, they have recently converted 2 small lakes/dams into one large one. The updated data layers are not yet available from the public domain so I was going to generate it myself. I know the current lake's elevation and the dam/damn's location.
I've tried reclassing the raster to the lake's elevation, but that wasn't too successful because the elevation value continued into other drainage basins.
Thanks,
kru
Create Lake Polygon
Started by
razornole
, May 02 2009 09:57 AM
1 reply to this topic
#1
Posted 02 May 2009 - 09:57 AM
razornole
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#2
Posted 02 May 2009 - 01:28 PM
Crischan
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Quick and dirty: Use a new feature dataset to create a polygon which bounds the real lake. Then cut the reclassified raster using the polygon (Spatial Analyst (?) => Extract by Mask) and patch it into the original DEM.
There's probably a better solution, but that's what jumps to my mind.
Cheers,
Crischan
There's probably a better solution, but that's what jumps to my mind.
Cheers,
Crischan
Crischan Wygoda
http://wygoda.net
http://wygoda.net
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