Dissolving "some" records

08-05-2019 11:15 AM
New Contributor

I have a parcel feature class with about 75K features, My attribute dissolve field has 500 or so parcels that I want to dissolve . The rest of the 70000 records have null in the dissolve field.  What I would like is an output feature class that shows all of the records both dissolved and null. I have tried dissolving all records but this dissolves the null records too. I have tried selecting only the records to be dissolved and running the dissolve tool but that just gives me an output file with  only the dissolved records. How do I only dissolve the records that are indicated and not dissolve the null records? 

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MVP Honored Contributor

You cannot do this in one step with geoprocessing tools.  You should select the records with values that you want dissolved and dissolve them.  Then select all of the records with Null values in your original parcels and use the Append tool with the NO TEST option to insert them into the Dissolve output.

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New Contributor

Thanks Richard. I appreciate your help.


Gene Del Greco GISP

GIS Manager

K.E. McCartney & Associates, Inc.

West Virginia Office

141 Basil Dr.

Weirton, West Virginia 26062

Office: 304-748-7873

Mobile: 419-545-3872

Mansfield Corporate Office

52 N. Diamond St.

Mansfield, Ohio 44902

Office: 419-525-0093


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