Knowledge Base



KB10490 - Size of the spatial indexes in the DK application.

TatukGIS products use R-TREE spatial indexing, which sometimes can result in the database indexes being as big as the data itself. Imagine indexing a one column table if the data in the column is random.

With R-TREE, each element is addressed. An alternative method is the QUADRANGLE method, which is a bit similar to "hashing". The advantage of R-TREE is that it provides faster access, whereas the QUADRANGLE method offers a smaller index file size.

Created: February 26, 2004, Modified: July 30, 2015