Forgot the link to the tutorial http://osgeo-org.1803224.n2.nabble.com/attachment/6137141/0/pregen_tutorial.html
Zitat von Matthias Müller <matthias_muel...@tu-dresden.de>: > Hi Christian, > > thanks for the hint and appreciation for your work. I am planning to > use this module on a PostGIS Datastore - if you have a documentation > I'd really like to read it. Right now I am diving into the subtleties > of feature generalization. > Decimal degrees are a bit tricky as the "real" generalisation distances > increase towards the equator. The choice is to either get too much > detail when reqesting data at medium or high latitudes or loose detail > around the equator. (I'll first try the conservative choice and check > the response times). The module chooses the generalization level for itself at runtime. The idea is not to draw a pixel multiple times for a given pixel dimension (WMS request as an example). The amount of net traffic is reduced and you have less memory and cpu consumption. > > Cheers, > Matthias > > Am 25.10.2011 17:16, schrieb christian.muel...@nvoe.at: >> Hi, I am the developer. The distance unit is taken from the coordinate >> system. Decimal degrees for wgs84. >> >> What is your backend store, I hope you are not working with shape files. >> Here is a postgis tutorial, until now I had not the time to write an >> official one. This tutorial can be adapted to other databases as well. >> >> Cheers >> Christian >> >> >> Zitat von Matthias Müller<matthias_muel...@tu-dresden.de>: >> >>> Hi, >>> >>> does anybody have experience with the pregeneralized datastore? I would >>> really like to try this one a larger dataset which contains complex >>> polygons in WGS84. >>> The critical parameter for this module is the "generalisation >>> distance". - But what is the unit for that distance? Is it in dataset >>> units (degrees in the case of WGS84 source) or is it in meters? >>> >>> Thanks, >>> Matthias >>> >>> >> >> >> >> ---------------------------------------------------------------- >> This message was sent using IMP, the Internet Messaging Program. >> >> >> ------------------------------------------------------------------------------ >> The demand for IT networking professionals continues to grow, and the >> demand for specialized networking skills is growing even more rapidly. >> Take a complimentary Learning@Cisco Self-Assessment and learn >> about Cisco certifications, training, and career opportunities. >> http://p.sf.net/sfu/cisco-dev2dev >> _______________________________________________ >> Geoserver-users mailing list >> Geoserver-users@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/geoserver-users > > > > ---------------------------------------------------------------- This message was sent using IMP, the Internet Messaging Program. ------------------------------------------------------------------------------ The demand for IT networking professionals continues to grow, and the demand for specialized networking skills is growing even more rapidly. Take a complimentary Learning@Cisco Self-Assessment and learn about Cisco certifications, training, and career opportunities. http://p.sf.net/sfu/cisco-dev2dev _______________________________________________ Geoserver-users mailing list Geoserver-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/geoserver-users
