[fdo-users] FDO spatial query

[Dan Stoica]

I'm not aware of such library. But it's quite easy to write some code to do this. E.g, for points, something like this:

Define a structure myPt={featid, x, y, x0, y0} where (x0,y0) is your point of reference.
- execute the spatial query and save the points into myPt items.
- sort the list of myPts by distance between (x,y) and (x0,y0).


-----Original Message-----
From: fdo-users-bounces at lists.osgeo.org [mailto:fdo-users-bounces at lists.osgeo.org] On Behalf Of bebeto
Sent: Tuesday, March 10, 2009 5:23 AM
To: fdo-users at lists.osgeo.org
Subject: RE: [fdo-users] FDO spatial query


And any idea for some library which can do such postprocessing? Have checked
JTS suite but does not support curvestrings :(


Dan Stoica wrote:
> 
> The short answer is: no, you cannot solve the problem without post
> processing the points.
> 
> -----Original Message-----
> From: fdo-users-bounces at lists.osgeo.org
> [mailto:fdo-users-bounces at lists.osgeo.org] On Behalf Of bebeto
> Sent: Monday, March 09, 2009 1:00 PM
> To: fdo-users at lists.osgeo.org
> Subject: [fdo-users] FDO spatial query
> 
> 
> hi, I need to create FDO query to return set of points in specific order.
> To explain problem easiest way - imagine you have predefined route (line)
> and want to return list gas stations (points) along that route with
> nearest
> first.
> 
> Only solution I was able to create was FDO_SELECT command with
> SpatialOperations.SpatialOperations_Intersects filter
> (usually they are in some short distance to this line, but make it
> simplier
> and assume points are exactly on line)
> collection of points returned was ok, but in random order.
> 
> Any ideas (even with different technology like FDO) how to solve this are
> welcome. My goal is to manage geometry only with using some library and do
> not write complex algorithms dealing with different geom. types like
> linestring curvestring etc. 
> -- 
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