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I have a list of geographic locators and a boundary file. In QGIS, is there any way merging them together to create a lookup saying this boundary contains these locators? Not the number the actual locator i.e. postcode, easting/northing.

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Just to be clear: your locators would be some sort of points of interest, and the boundaries would be some area like a single municipality, or city district? – SAnderka Nov 26 '12 at 14:51
Please provide a example subset of your data. This will simplify further answers. I believe you should somehow geocode (get locations) your locators. Then you could test if a given location (point) is in your boundary. – Curlew Nov 26 '12 at 16:20
The boundary is school catchment area and locators are each child's home address. I want to know which locators lie within each catchment area. I have 10,000 postcodes so testing each one individual is not something I am prepared to do! – BNA Nov 26 '12 at 16:43
It sounds like a term you should search for is spatial join – djq Nov 26 '12 at 16:55

You can use the Spatial Tools 'Analysts Tools' in QGIS

This Guide 'Tutorial: Spatial Analysis - Points in Polygon ' is a good example how to do 'Points in a Polygon'

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