AnsweredAssumed Answered

Population geoprocessing

Question asked by geonetadmin on Nov 7, 2013
Latest reply on Dec 6, 2013 by xander_bakker
Original User: M.P.N.Mark_RUG

Good day all,

i have a question about the dissolving of polygons into new polygons, based on a 'more than x inhabitants' selection.
So, my data is a 500m grid polygon with attributes which tell me the inhabitants of that specific polygon for the year 2000 to 2012 (in different fields).

My first step is to select the polygon which have more than 100 inhabitants. This data will be used to create the new polygons. My first thought was to make a model based on the following idea:

Select by attributes -> Inhabitants > 100.
Export selected data
Dissolve the polygons in one polygon if they are connected and add all the attributes from the 2012 inhabitants field into one field if applicable.
So you will get a new polygon based on 100 or more inhabitants with the attributes from the year I choose.

However, when I try the dissolve tool, I still get the same results as the select by attributes.
I think I overlooked something, but I don't know what. In what way can I create polygons based on attributes and also calculates the attributes into one new attribute? Do I have to write a python script?

Thanks in advance,