[geos-devel] troubles understanding GEOS

[Markus Schaber]

Hi, Tobias,

Tobias Nothdurft wrote:

> But there has to be a gain to link my programm with some kind of database when i
> have to handle hundreds or thousands of objects! :) So how do I accomplish this
> connection? With the WKT-reader and -writer?

Yes, or you can use libpqxx directly.

Databases provide you with a higher layer of abstraction. With PostGIS,
you can e. G. load all your linestrings in a table, create an
geometrical index on it, and then easily and efficiently fetch all
linestrings in a specific area with a query like:

SELECT * FROM mytable WHERE the_geom && 'BOX(1 2,3 4)'::box2d;

HTH,
Markus
-- 
Markus Schaber | Logical Tracking&Tracing International AG
Dipl. Inf.     | Software Development GIS

Fight against software patents in Europe! www.ffii.org
www.nosoftwarepatents.org

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