Hey guys,

i have the following problem: I have a set of buildings (either as a polygon, or if needed as centroid points) which I want to "sum up" in larger polygons. My buildings are classified in 8 different classes (as attribute), which should be used for calculating the larger polygons. Basically I would like to have a set of polygons, divided in 8 classes, which cover the whole urban area. So far, I havent found a solution which fits my case. Does anyone of you have an idea, how to do this?

Thanks in advance, greetings.

i have the following problem: I have a set of buildings (either as a polygon, or if needed as centroid points) which I want to "sum up" in larger polygons. My buildings are classified in 8 different classes (as attribute), which should be used for calculating the larger polygons. Basically I would like to have a set of polygons, divided in 8 classes, which cover the whole urban area. So far, I havent found a solution which fits my case. Does anyone of you have an idea, how to do this?

Thanks in advance, greetings.

The solution is the Dissolve tool. Use the attribute that groups the buildings into 8 classes as the Dissolve Field. You can sum the shape area or other area field using the Summary Fields. Use the Multi-part option to make sure that discontinuous buildings are merged together by the dissolve to get a complete summary of each building class in a single polygon per class.

If you don't need polygons as the output and just want a table summarizing the building class areas, just use the Summary Statistics tool with similar settings. The summary table output could be joined to the original polygons through the building class field, as long as only one field is used to create the class breaks.