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Split Oracle Sdo_Geometry Linestring at a Known Point using PL/SQL (1)
This article describes how to split a linestring or a multilinestring using PL/SQL at a known point.
30 June, 2021
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Geometry object size when exchanging of WKT/WKB encoded geometries.
Introduction The ordinates stored in an geometry objects, across all spatial data types do not have any rounding applied to their values. This is one
12 December, 2020
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Geometry Validity and Method Access
Introduction All database spatial types that I have worked with have constructors based on Well Known Text (WKT). When constructing a geometry all those types
6 December, 2020
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Linear Referencing System (LRS) Functions for TSQL
This articles logically steps through all the functions in a complete package of Linear Referencing functions that I have written for TSQL. The article both demonstrates the power of SQL Server Spatial but what can be done with TSQL.
6 December, 2020
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My Services
1. Solutions Architecture. I discovered over the years that I am a pretty good systems and solutions architect. How does this apply to you? Well,
4 December, 2020
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CheckRadii: Identifying Tight Radius Curves sections within LineString geometry data
Sometimes it is a data quality requirement for linear data (roads, pipelines, transmission lines) that curves within the lines must have a radius greater than
30 November, 2020
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The Sad State of GIS SQL Standards
The background to this blog comes from two separate sources: the first is my testing of SQL Server 2008 “Katmai”, and secondly, a blog article
30 November, 2020
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Overlaying Polygons in SQL Server Spatial
Introduction The OGC operators for geometry processing only support two polygon inputs. Additionally the Microsoft aggregate operators only include geometry union processing geometry::UnionAggregate and not
25 November, 2020
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Oracle Spatial Mapping and Map Rendering Performance Tips
Comment: This article was written about 10 years ago. Most of what is written is still relevant though the comments about disk usage and access
23 November, 2020
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Space Filling Curve Functions For TSQL
Introduction Warning: This article is long mainly because it includes the source code of the Hilbert, Morton and Peano key/curves. I would assert that space
22 November, 2020
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