The following is an introduction to the PL/SQL packages downloadable from this site. The following is an example of how the GF ( G eometry F actory) package was used to implement the rounding of the vertices of an Sdo_Geometry object to the tolerances specified in the DIMINFO structure of a USER_SDO_GEOM_METADATA entry. New users of OracleRead More
Finally, I have finished enough recoding of my PL/SQL packages and object types for Oracle Locator/Spatial to make them available on my site. The oracle_spatial_packages_and_types.zip file contains all my Oracle Spatial Packages and Types. The package should be installed into a schema called CODESYS. A create_schema.sql script is supplied which should be run as system.Read More
One of the things that should be taught to GIS students at Uni but isn’t in a lot of courses is the notion of space keys or space-filling curves. The mathematics behind these keys was done before computing by mathematicians like: Giuseppe Peano David Hilbert The one that most GIS people are introduced to isRead More
This page documents the changes made to all my Open Source Spatial Database Scripts.
This article describes the Software Philosophy and Business Model behind the availability of the free spatial products on this website. Yes, the products are free, but a donation is required for all access to them at every point in its distribution. Note that the requested donation is TINY compared to the time spent creating each product and TINY compared to the time you will save by not having to create a function, class etc from scratch.