Spatial Analyst Distress Call - Reclassify producing strange results
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1
04-27-2010 10:06 AM
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This problem has recently starting occurring everytime I run a reclassification in Spatial Analyst. I think some setting has been changed but so far I'm unable to determine what it could have been.
I am working with integer grids where certain values must be reclassified to be either a '1' or '0' respectively. The results are always a new integer grid where values are either '1' or '0' in the entire grid. Recently one of my reclassify operations ended with a raster that appeared looking like this:
Notice in the table of contents it is classified into 9 classes, but the raster itself appears to be correct having only two values.
At first I thought it was simply a symbology issue. I thought Arcmap had somehow defaulted to showing the raster in 9 classes even though there are only two unique values (again, '1' or '0'). But in the properties of this raster I cannot change it to only 2 classes. First I get an error saying there is no attribute table, so I tell ArcMap YES to build one. Once the table is built, I can see in the symbology tab that indeed 9 classes are assigned on the color ramp, but it will not allow me to switch to 2 instead. It gives me an error saying "Can't read descriptor table".
To reiterate, this problem started occurring quite suddenly using data I have been working with for awhile. My coworker ran an identical reclassify process on the same data and his results were normal, so I believe something has gone sour with my settings.
Has anyone had this problem before, or knows of a quick fix?
Many thanks for your help.
I am working with integer grids where certain values must be reclassified to be either a '1' or '0' respectively. The results are always a new integer grid where values are either '1' or '0' in the entire grid. Recently one of my reclassify operations ended with a raster that appeared looking like this:
Notice in the table of contents it is classified into 9 classes, but the raster itself appears to be correct having only two values.
At first I thought it was simply a symbology issue. I thought Arcmap had somehow defaulted to showing the raster in 9 classes even though there are only two unique values (again, '1' or '0'). But in the properties of this raster I cannot change it to only 2 classes. First I get an error saying there is no attribute table, so I tell ArcMap YES to build one. Once the table is built, I can see in the symbology tab that indeed 9 classes are assigned on the color ramp, but it will not allow me to switch to 2 instead. It gives me an error saying "Can't read descriptor table".
To reiterate, this problem started occurring quite suddenly using data I have been working with for awhile. My coworker ran an identical reclassify process on the same data and his results were normal, so I believe something has gone sour with my settings.
Has anyone had this problem before, or knows of a quick fix?
Many thanks for your help.
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