The populate CENTROID package has been modified. It now allows the caller of the CENTROID_A function to invoke Y ordinate seeding. This is what it looks like. I hope this enhancement is of use to someone.
The CENTROID package that I make available for free exposes a function for generating centroids of polygon (or area) objects. Here is the function: If you call the function with its defaults, the p_method parameter will be 1. For this value, the code determines the X ordinate extent of the polygon’s MBR, and selects theRead More
My CENTROID package has been downloaded thousands of times and, except from some initial problems appears to have performed flawlessly. Until now! The thing about spatial data is that, once you think you understand its intricacies it bites you for being so stupid! A user contacted me to let me know some use cases thatRead More
My CENTROID package is a very popular download from my website. In this article I want to expose a couple of issues that catch new users of my package. These issues are documented in the header of the relevant functions but because there is no separate end user documentation (other than the blog articles onRead More
My CENTROID PL/SQL package is a hot download from this site. It seems there is a need out there for variations on the generating of centroids. Recently I ported my centroid algorithms to SQL Server Spatial (Denali). In doing so a few improvements or changes were made. These include the ability to: Provide the centroidRead More
The top download from my website is for my package of centroid algorithms for Oracle sdo_geometry. There is nothing wrong with the STCentroid function implemented in SQL Server Spatial (for one thing it handles geography objects natively), but it seems that having a choice of centroid algorithms is a big thing for users of spatialRead More