I'm trying to find a geoprocessing tool like a beefed-up near analysis that will search outwards from a point (or polygon) of origin until a specified value (not distance or count) is reached. Let's say I'm using a counties feature class and specify a parameter of max 1,000,000 in the population field. The tool would begin with a user-specified county and travel outward in a radius tallying up each county's population until the parameter is met. Any ideas, either for existing tools or model-builder?
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