Hot answers tagged arcgis-9.3
I'm not sure what join method you used, however since you have two GIS layers I would suggest for you to use Spatial Join. Target feature should be your crime point layer Once data set is joined, you can summarize the census tract name field (within the point feature table) to get the crime count per census tract
The Raster Calculator requires a Spatial Analyst license. You will also need to have the Spatial Analyst turned on as an Extension and the Spatial Analyst toolbar open to find it. The help on Raster Calculator from ArcGIS 10.1 gives more detail than in earlier versions.
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