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Spatial Join - Empty   Ian MacPhedran Mar 09, 2010
Re: Spatial Join - Empty   Alisa Wade Mar 16, 2010
Re: Spatial Join - Empty   Ian MacPhedran Mar 16, 2010
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Subject Spatial Join - Empty 
Author Ian MacPhedran 
Date Mar 09, 2010 
Message I have (or rather one of my users has) two datasets, both of point locations. One set has buffer regions created, and the buffers are used as the "Target feature", the other point set is used as the "Join feature". (The idea being to capture the number of points in each buffer zone.)

Some subsets do produce correct tables, but the full datasets and other subsets produce an empty table.

For the moment, we've moved to generating a "Near table" with a search radius. (Same radius as the buffer.) That should give the same results with a bit of extra work, but is a bit more effort than it should be.

Are there any known problems with Spatial Joins? 
   
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Subject Re: Spatial Join - Empty 
Author Alisa Wade 
Date Mar 16, 2010 
Message Spatial joins can behave oddly in a geographic projected space. The shapefiles and the data frame should all be in the same, projected, space. Another issue can be whether there are appropriate uniqeIDs associated with the objects. Not sure if any of that helps... 
   
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Subject Re: Spatial Join - Empty 
Author Ian MacPhedran 
Date Mar 16, 2010 
Message Thank you. Yes, your reply could very well explain the "odd behaviour."