DK - R-tree Spatial Indexing
	FAQ Feed

Q10279 -  What is the R-Tree file and how can it be used? "R-Tree' is a spatial index file used in TatukGIS products that can dramatically increase the speed of spatial operations relating to the viewer of very large vector files (hundreds of megabytes) at relatively closer zoom level ... (Modified: 2005-04-26)

Q10262 -  Do you support spatial indexing over shapefiles to improve on-disk access to large shapefiles? Similarly, for dbase attribute indexing? The DK (and all TatukGIS products) supports R-Tree spatial indexing for any shape. It works well. We do not do attribute indexing because ... (Modified: 2004-12-14)

Q10291 -  My large (a few hundred megabytes) shape file is sluggish. Why? 1) Add more RAM memory to your computer. TatukGIS uses memory mapped files to provide optimal performance. But if your file is really very, very large, Windows cannot do this efficiently without sufficient RAM. ... (Modified: 2004-12-10)

Q10750 -  After enabling the R-Tree spatial indexing feature my shapefile layer becomes even slower. Verify that the obligatory *shx file exists. By definition, a complete SHP format map file is composed of a *shp file containing the map geometry, a *shx index file, and a *dbf file ... (Modified: 2007-04-06)

Q10396 -  When I am using R-Tree while adding new items and then quit without saving, the R-tree index is automatically rebuilt the next time that I reopen the program. Why? The DK is designed to work in this way because, if a user quits without saving layer while the R-tree is addressing in-memory shapes, ... (Modified: 2004-12-14)

Q10721 -  Can the vector map data that I distribute to the users of my DK based application be pre-packaged with the R-tree index files? I want to manage the user's first experience by eliminating the step of generating the R-tree files (which is time consuming) when the data is first opened by each user. Yes ... (Modified: 2006-10-18)

Q10784 -  In my DK application I get the exception "Cannot open shapefile.shp.rtree. Cannot access file because it is being used by another process. Why? This exception can occur if a layer is open more than once, even within same application. This exception can be ignored. It is handled ‘gracefully’r-tree. ... (Modified: 2008-01-23)