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Hi, Thanks Jukka, thanks Martin for your hints. I think I will try to solve some of my problems using postgis-functions like Jukka supposed. If I get round to I will try to deal with JEQL, too. Sounds promisingly. Nils Martin Davis schrieb: Nils, you might try looking at JEQL to do this. http://tsusiatsoftware.net/jeql/main.htmlIt's based on the same geometry library as OJ (JTS), and is probably a little more suited to running batch operations on large datafiles. Feel free to contact me directly for more info. Martin Nils Kuhn wrote:Hi, unfortunatily, I have to work with some very large vector-layers at the moment (more than 800.000 polygons in some shape-files). I have to select features by attribute, write some selections to new layers, union features by attribute, etc. (classical GIS-tasks). That's actually no fun! Has anybody some performance-tips? What's the best data format for working with large vector-layers in OJ? I loaded a polygon-shape to a postGIS-table via shp2pgsql with a spatial index (GIST) but the loaded table doesn's show a better performance than the shape-file (PostgreSQL-Server is located on a windows-server in a local network). Regards, Nils ------------------------------------------------------------------------------ This SF.net email is sponsored by Make an app they can't live without Enter the BlackBerry Developer Challenge http://p.sf.net/sfu/RIM-dev2dev _______________________________________________ Jump-pilot-devel mailing list Jump-pilot-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/jump-pilot-devel -- Dipl.-Biol. Nils Kuhn Email: nils.k...@bws-gmbh.de Fon: +49 (0)40 - 23 16 65-26 Fax: +49 (0)40 - 23 16 65-01 BWS GmbH Gotenstraße 14 D-20097 Hamburg Sitz der Gesellschaft: Hamburg Amtsgericht Hamburg: HRB 87830 Geschäftsführer: Dipl.-Geol. Robert Dési Dipl.-Geogr. Hydr. Lutz Krob ************************************************************************************************************* HINWEIS: Diese E-Mail und beigefügte Dateien dienen nur der Vorabstimmung und stellen keine rechtswirksame Willenserklärungen oder Beratungsleistungen dar. Es können keine Haftungsansprüche gegenüber der BWS GmbH geltend gemacht werden. Alle rechtswirksamen Äußerungen (Verträge, Stellungnahmen, Berechnungen, Vermerke etc.) erhalten Sie von uns in schriftlicher Form und gegebenenfalls auf separatem Datenträger. Wenn Sie nicht der richtige Adressat sind oder diese E-Mail irrtümlich erhalten haben, informieren Sie bitte den Absender und vernichten Sie diese E-Mail. Unerlaubtes Kopieren und Weiterleiten dieser E-Mail sind nicht gestattet. ************************************************************************************************************* |
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