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This similar, but not quite the same as this question.

I need to pick, regardless of distance, the closest 'n' points to a given point in another table, using postGIS.

Imagine a table with city names, state names, and a centroid for the city itself, and another table with point information on various weather radar sites. Both tables re postGIS enabled.

PostGIS-2 has me confused; it's been awhile since I had to do something line this.

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