Hi Carlos. Thanks for your quick response.
I think a code example would be very helpful. I also have a tough time realizing the interaction between GEOS and PostGIS. I know that PostGIS extends PostgreSQL with geometric functions. But i don't understand how my programm can access a PostGIS-extended database with GEOS. Or am I off the track? Tobias Zitat von "Del Cacho, Carlos (Carlos)" <[EMAIL PROTECTED]>: > Yes, GEOS can do this. There is a spatial index that you can use instead of > looping all your line strings. > > http://geos.refractions.net/ro/doxygen_docs/html/classgeos_1_1index_1_1quadt > ree_1_1Quadtree.html > > I am using this structure for a CAD mock up project of mine. I can provide > example code if you wish, just drop me an email. Basically, you assign any > piece of data to an envelope, store it in the index, and you can have > efficient queries afterwards. > > For reference: > > http://en.wikipedia.org/wiki/Quadtree > > > Greets, > Carlos del Cacho > > > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] Behalf Of Tobias > Nothdurft > Sent: martes, 28 de noviembre de 2006 9:44 > To: geos-devel@geos.refractions.net > Subject: [geos-devel] troubles understanding GEOS > > > Hello Guys. > > I've found youre project a few days ago and i'm trying to find out, whether > i > can solve my following problem: > > I have to insert a lot of obstacles (Line-Strings) into a map. Afterwards i > want > to know the obstacles, which are in a specific section of the map. > > Is this possible using GEOS? > Do i have to compare my square for a specific section of the map with all > database-objects to find the obstacles intersecting my square? > > With kind regards. > > Tobias _______________________________________________ geos-devel mailing list geos-devel@geos.refractions.net http://geos.refractions.net/mailman/listinfo/geos-devel
