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Looking for help with spatial query SQL
Posted by: Jennifer Shanks
Date: October 18, 2005 12:24PM

Hello,

I am looking for suggestions on how to write a spatial query SQL statement.

Let's say that I have two layers, trail segments and campgrounds (points). I would like to find all campgrounds within 3 miles of the trail system. In reading through the documentation, it looks like a lot of the spatial query functions are yet to be implemented and that the ones that are implemented use MBRs only. Does anyone have any creative work-arounds for this query?

The only thing I can think of would be to create a three mile buffer of each trail segment using my GIS package, import that into the database and write a script that loops through the MBRs for each trail segment buffer and checks to see if there is a campground within the MBR. This would not be very accurate (would include extra campgrounds), but is the best idea I have so far.

If you have any suggestions or sample SQL statements, I would be very appreciative of the help.

Thanks,
Jennifer Shanks

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