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Functions to Convert Native PostgreSQL geometric types to PostGIS
A set of functions that enable the conversion of the native PostgreSQL geometric types to PostGIS geometry objects.
18 May, 2024
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Converting PostgreSQL Native Geometric Types to PostGIS
Introduction I comes as a surprise to some that PostgreSQL has it own native geometric type system. The geometric types are documented here but the
17 May, 2024
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The Frontage Problem: Creating references from land parcel street frontage boundary to point in street
This article demonstrates the power of database-based spatial processing. The business requirement is to determine, dynamically, the side of a land parcel that faces the street (could be single 2 point straight line to something more complex), and then determine the clockface direction from either ends of the frontage or the middle, to a object in the roads reserve (eg telecommunications pit).
3 November, 2020
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Create GeoJSON Document from Selection of SDO_Geometry objects.
This article shows how to create a GeoJSON Document from Selection of SDO_Geometry objects.
30 October, 2020
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STUpdateN: Update (replace) a single vertex within a geometry object.
SQL Server Spatial, unlike spatial database type systems such as PostGIS, does not provide coordinate editing functions: STAddPoint STUpdatePoint STDeletePoint These functions are not a
7 August, 2020
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STDeleteN: Delete single vertex from geometry
SQL Server Spatial, unlike spatial database type systems such as PostGIS, does not provide coordinate editing functions: STAddPoint STUpdatePoint STDeletePoint These functions are not a
7 August, 2020
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STDelete: Deleting vertices in geometry objects
SQL Server Spatial, unlike spatial database type systems such as PostGIS, does not provide coordinate editing functions: STAddPoint STUpdatePoint STDeletePoint These functions are not a
7 August, 2020
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Using Oracle’s ST_GEOMETRY type hierarchy with SDO_GEOMETRY: ST_PointN and ST_NumPoints
Oracle Spatial has, for many versions, made available an implementation of the OpenGIS SFS type hierarchy. Today I will show how to use this type
7 August, 2020
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PostGIS: Creating a line inside a polygon
I love working with the PostGIS API. It is a deep and wide river to swim in. But sometime having read, researched, experimented, and not
7 August, 2020
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ST_Densify for Object PLSQL
The Java Topology Suite (JTS) has a linestring densifier function that is available in my Spatial Companion for Oracle (SC4O) solution. See here for documentation.
5 August, 2020
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