Problem: Histogram from a graphical selection on a string field-symbolized raster displays incorrectly
This problem is addressed in ArcGIS 8.1 Service Pack 1. See the Related Information section to download this pack.
Use the drawing tools to draw a graphic over a portion of a raster layer that is symbolized using a string field. The histogram produced by clicking the Histogram tool of ArcGIS Spatial Analyst gives incorrect results.
This is a known issue with ArcGIS 8.1.
Solution or Workaround
- Use the Value field to symbolize the data.
- Do a graphical selection.
- Click the Histogram tool.