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I am using the Kernel Density tool in ArcGIS Desktop 10.4.1 to visualize population density around two metro area transit lines. According to ESRI: "The Kernel Density tool uses an algorithm to calculate density of point features around each neighborhood. The algorithm determines the default search radius (bandwidth), which allows for better weighting of highly dense points and smoother outputs. The following ArcGIS Help document, How Kernel Density works, further describes the tool." - source

The metro areas are Portland, OR and Charlotte, NC.

The tool input is a census tract shapefile joined with a population data table.

The resulting raster has the same boundary as a tract shapefile for one metro but is just a rectangle for other.

Any ideas what could cause this?

Kernel Density Tool results:

  • Portland, OR metro census tracts

PortlandOR metro census tracts

  • Charlotte, NC metro census tracts

CharlotteNC tracts

closed as unclear what you're asking by PolyGeo Apr 10 '17 at 19:46

Please clarify your specific problem or add additional details to highlight exactly what you need. As it's currently written, it’s hard to tell exactly what you're asking. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.

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    Welcome to GIS SE! As a new user please take the tour to learn about our focused Q&A format. Your screenshots don't appear to have been added correctly - can you please edit your question to include any missing info. – Midavalo Apr 10 '17 at 18:08
  • Are you using ArcGIS Desktop or something else? – PolyGeo Apr 10 '17 at 19:46

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