topic Re: Dissolve by Attribute Range in ArcGIS Spatial Analyst Questions

Dissolve by Attribute Range

ClintWyatt — Thu, 08 Nov 2012 17:30:08 GMT

I converted a raster into a vector shapefile and now I would like to dissolve the cells but I want to do it by range. The data is just residual data (% difference) between two previous raster files. I would like to dissolve in 25% increments. I've tried dissolve but it doesn't have the Statistic RANGE available to use.

Any help would be much appreciated.

Thank you

Re: Dissolve by Attribute Range

Anonymous User — Fri, 09 Nov 2012 02:14:29 GMT

I think the easiest thing to do would be to just add a new field and assign a unique value for each range. For example 0-25% =1, range >25 AND range < 50% = 2, and so on then dissolve by that new field.

Re: Dissolve by Attribute Range

EricRice — Fri, 09 Nov 2012 14:36:29 GMT

Run the reclassify tool on the raster data prior to converting it to polygons to get the right ranges. You may still need to dissolve the polygons after the fact depending on your needs.

Best,
Eric