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I tried to do change detection using ArcMap. To do this I followed the following steps.

  1. Convert from raster to polygon via "value" field (aware as I have 7 classes)
  2. Dissolve through dissolve geoprocessing tool via "gridcode" field. However, here instead of producing 1,2,3,4,5,6, and 7 classes it gives me 1,2,3,3,4,4,4,5,5,6,and 7 dissolved classes. So, I need to have 1,2,3,4,5,6,and 7 classes(how can adjust this)
  3. I tried to Intersect geoprocessing tool via following the above steps but it brings to the following error:

the background processing has encountered a serious error and is unable to continue".

How do I solve this?

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    There are too many potential causes of something like this, and most of them indicate your software install is corrupt. Reinstalling the software is indicated (with all the recommended/security patches). After that you should test with background geoprocessing disabled, and then again with it enabled.
    – Vince
    Commented Jun 15 at 22:04
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    You don't need to convert raster->vector to do change detection, it can be done as raster.
    – user2856
    Commented Jun 16 at 9:14
  • Dear mates in this group, I haven't solved the above problem yet. Especially when I dissolve instead of forming 1,2,3,4,5,6,7, classes it is giving me 1,2,3,3,4,4,4,5,5,6, and 7. So, help me to figure out the problem
    – Samuel Mekonen
    Commented Jul 31 at 7:12

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