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Processing GML data using PostgreSQL’s XMLTABLE
This article shows how to use PostgreSQL’s XMLTABLE XML operator to process GML data and create PostGIS geometries.
1 October, 2020
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STInsertN: Insert single vertex into a 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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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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STUpdate: Replace all points equal to the supplied point with replacement point.
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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Spatial Representation of a Communications Pit
This article describes the elements of a telecommunications pit and shows how they can be spatially represented. In particular the concept of a butterfly as a method for displaying the walls of a pit is introduced.
7 August, 2020
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Urban Trees Data Model
Data model for the recording of urban trees in a city, town or council
7 August, 2020
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