Killer Data
Back in 2005 I wrote two article on LiDAR. These articles are: Killer Data – Part 1 Killer Data – Part 2 Enjoy.
Articles
Delaunay Triangulation Function for TSQL and SQL Server Spatial
This article shows how to create a delaunay triangulation (mesh) from various inputs in SQL Server Spatial, and compute the 3D (slope) area.
Creating linestring geometries from a table of ordinates (SQL Server)
This article shows how to create linestring and mutlilinestring SQL Server geometry objects from a from table of ordinates.
Creating linestring geometries from a table of ordinates (Oracle)
Introduction (This article is about Oracle Spatial.) It is quite a common thing to have ordinates held as separate columns within a table as in the following CTE example. How does one create linestrings and multilinestrings from this data? First things first: A linestring A linestring can be created by serialising the separate x, yRead More
Partition Spatial Data using SQL Server
In this article a quad tree tesselation is used to define how to partition a table of based on its spatial data (geographic points) in SQL Server. The recursive spatial partitioning uses the spatial content to influence each grid cell size.
Removing Spikes in SQL Server Spatial Linestrings
This article presents a method for identifying and removing spikes in SQL Server Spatial linestrings and polygon rings. Spikes are common when processing GPS observations.
Geometry Storage Format
This article outlines why the storage formats used for geometry data by database spatial APIs are irrelevant: what is important is logical access.
How to calculate cumulative length of a linestring, or the truck tonnage that accumulates across a set of roads
This articles describes how to compute the cumulative length of a single linestring, or the total tonnage that crosses a set road segments.
qGIS, GEOMETRY_COLUMNS and SQL Server Spatial
This article recommends using the GEOMETRY_COLUMNS metadata table to control access to feature tables and their geometry properties for qGIS.
Removing Duplicate Vertices in SQL Server Spatial
This article shows how to remove duplicate vertices/point in SQL Server Spatial geometry objects.