[geos-devel] Porting LengthIndexedLine.project?

Howard Butler hobu.inc at gmail.com
Tue Aug 11 21:51:23 EDT 2009


Filing a ticket and attaching the patch is the best way to ensure it  
doesn't get lost.  Putting a milestone on it (like 3.2) will also help  
ensure someone looks at it.

Howard

On Aug 11, 2009, at 8:22 PM, David Turner wrote:

> Did I send this to the right place?  Or should I create a ticket
> somewhere?  Or is my patch totally off-base?
>
> Just trying to make sure this doesn't get lost in the noise.
>
> On Fri, 2009-08-07 at 16:45 -0400, David Turner wrote:
>> OK, I've done the port.  A patch, with ported tests, is attached.
>>
>> On Thu, 2009-07-23 at 11:13 -0400, David Turner wrote:
>>> JTS has a class called LengthIndexedLine with a method "project",  
>>> which
>>> lets you figure out  the nearest point on a line to a given  
>>> point.  This
>>> is useful, for instance, if you are trying to figure out what  
>>> street a
>>> person is on from (possibly slightly inaccurate) GPS observations.
>>>
>>> http://tsusiatsoftware.net/jts/javadoc/com/vividsolutions/jts/linearref/LengthIndexedLine.html#project(com.vividsolutions.jts.geom.Coordinate)
>>>
>>> PostGIS calls this function st_line_locate_point.
>>>
>>> GEOS doesn't seem to have it, even though I was under the impression
>>> that GEOS was merely a port of JTS.  If I port JTS's project  
>>> function
>>> and related functions such as extractPoint to GEOS, would that  
>>> patch be
>>> likely to be accepted?  Or am I missing something about the  
>>> relationship
>>> between JTS and GEOS?
>>>
>>>
>>> _______________________________________________
>>> geos-devel mailing list
>>> geos-devel at lists.osgeo.org
>>> http://lists.osgeo.org/mailman/listinfo/geos-devel
>> _______________________________________________
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>
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