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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.
7 April, 2022
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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
This article demonstrates how an invalid polygon (and linestring) are handled by the different database spatial APIs with correction in TSQL.
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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Pseudo Array Implementation for SQL Server Spatial (Part 2)
Introduction Data Structure + Base Function Accessors and Setters Four functions are declared for processing geometry or geography data within the array. These are “wrappers”
30 November, 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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