Hi Robert, I can offer a brieft summary:
Spatial Indexing refers to DBMS that support (fundamentally) multi-part key indexes and associated acceleration structures like kd- and r- trees. The common "spatial" use-case is a multi-part (primary, secondary, and tertiary) key of [X,Y,Z] or [lat,long,elevation]. The traditional concept of tile paging translates into spatial queries of the DBMS in real-time. Spatial queries can be cover a range of operations from area/volume retrieval to spatial alglebra (intersect, nearest, inside, etc.) that can include GIS qualifiers like countries, cities, roads, etc. Regards, Marcus On Wed, 2006-10-04 at 17:30 +0100, Robert Osfield wrote: > HI Larry, > > I haven't hearing of spaitial indexing before, care to explain? > > Thee PagedLOD node that manges the LOD ranges and what tiles to page > in can be as set in pretty any spatial way you want, typically it'd be > a quad tree group hanging off the second child (the external tile) and > the first tile which is the low level of detail. You could set up > this relationship anyway way you want, its entirely down the the > database generation tool. > > Robert. > > On 10/4/06, larry davis <[EMAIL PROTECTED]> wrote: > Hi, > > After a brief look at the databasepager and the readerwriter > plug-in, I wonder how can OSG handle data source that supports > spatial indexing, so that the data source don't have to be > tiled. > > Can someone point out to some examples about osg and spatial > indexed source data, if there is any. > > Larry > > > ______________________________________________________________ > All-new Yahoo! Mail - Fire up a more powerful email and get > things done faster. > > > _______________________________________________ > osg-users mailing list > [email protected] > http://openscenegraph.net/mailman/listinfo/osg-users > http://www.openscenegraph.org/ > > > _______________________________________________ > osg-users mailing list > [email protected] > http://openscenegraph.net/mailman/listinfo/osg-users > http://www.openscenegraph.org/ _______________________________________________ osg-users mailing list [email protected] http://openscenegraph.net/mailman/listinfo/osg-users http://www.openscenegraph.org/
