[geos-devel] Planar point location query?

[Paul Ramsey]

Like osgPlanet?  <http://www.ossim.org/tiki-read_article.php? 
articleId=3>
Or Punt? <http://punt.sourceforge.net/>

For vector computational geometry, GEOS is a good choice, but for 3d  
viewer purposes there are much more developed frameworks to hang your  
stuff off of.  The two links above are examples of developed  
projects, the link below is more infrastructural, but still more on- 
point than GEOS in particular.

Openscenegraph: <http://www.openscenegraph.org/>

Don't re-invent the wheel on this one, there are lots of open source  
starting points to work with.

Paul


On 13-Feb-06, at 10:13 AM, Okeefe, Charlie (Mission Systems) wrote:

> Well, more broadly, I'm writing a 3D earth viewer for terrain, raster
> and vector data as well as overlaid function plots. One early issue  
> that
> sparked my question was, if the user clicks somewhere with the mouse,
> quickly determine the region the user clicked. I suppose I am looking
> for a sort of computational geometry framework, especially for dealing
> with vector data. So far I use GDAL for accessing geospatial data  
> but I
> think that is just an importer/exporter. Whether to use a database or
> not, I'm not sure about yet. Can you suggest tools (LGPL or similar)
> that might be ideal for this? Thanks again for your response.
>
> Charlie
>
> -----Original Message-----
> From: geos-devel-bounces at geos.refractions.net
> [mailto:geos-devel-bounces at geos.refractions.net] On Behalf Of Paul
> Ramsey
> Sent: Sunday, February 12, 2006 7:13 PM
> To: GEOS Development List
> Subject: Re: [geos-devel] Planar point location query?
>
> That's a pretty easy question Charlie, and almost any spatial  
> framework
> at all will answer it.  Whether GEOS is the tool for the job  
> depends on
> what your larger architectural context is.  Is the question always  
> going
> to be that easy, or will it get harder, larger, more frequent?  Would
> the flexibility of a database help?  If time-to- deployment is an  
> issue,
> either using PostGIS and SQL as the interface, or Mapserver and the
> Mapserver CGI as an interface can give you a system that answers that
> kind of a question in half an hour or less of setup.
>
> P
>
> On 12-Feb-06, at 5:22 PM, Okeefe, Charlie (Mission Systems) wrote:
>
>> I'm wondering if GEOS is (capable of) / (a good fit for) answering  
>> the
>
>> following problem:
>>
>> Given a static database of countries and oceans in the world, each
>> defined by a set of polygons, answer the query, "which country or
>> ocean contains point P?" where P has some arbitrary latitude and
>> longitude.
>>
>> Thanks for any help!
>>
>> Charlie
>> _______________________________________________
>> geos-devel mailing list
>> geos-devel at geos.refractions.net
>> http://geos.refractions.net/mailman/listinfo/geos-devel
>
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