Overview

Project website postgis.net/workshops/postgis-intro
Project maintainers User avatar jef User avatar astrid_emde User avatar dmateos User avatar dkastl User avatar jsanz User avatar andischi User avatar yellow73 User avatar komzpa User avatar cvvergara
Translation license Creative Commons Attribution 3.0 United States
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Source code repository https://github.com/postgis/postgis-workshops.git
Repository branch master
Last remote commit Merge pull request #146 from AllenSH12/fixups 37f3a52
Regina Obe authored 11 days ago
Last commit in Weblate Translated using Weblate (Japanese) 90ade02
Weblate Translation Memory authored 12 days ago
Weblate repository https://weblate.osgeo.org/git/postgis-workshop/index/
File mask postgis-intro/sources/locale/*/LC_MESSAGES/topology.po
Translation file Download postgis-intro/sources/locale/de/LC_MESSAGES/topology.po
Last change June 10, 2025, 6:58 p.m.
Last author None
11 days ago

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Strings with suggestions 1% 1 1% 1 1% 8
Untranslated strings 100% 61 100% 1,634 100% 10,453
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Resource updated

  1. postgis-workshop
  2. topology
  3. German
The "postgis-intro/sources/locale/de/LC_MESSAGES/topology.po" file was changed. 12 days ago
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We do still have gaps of empty space between neighborhoods caused by intensive simplification. Such issues can be fixed by directly editing the topology using the `Topology Editor family of functions <https://postgis.net/docs/Topology.html#Topology_Editing>`_ and/or filling in the holes and assigning those to neighborhoods.
 
12 days ago
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What is returned are a set of topolements. A topoelement is represented as an array of 2 integers with the first number being the id of the element, and the second, being the layer (or primitive type) of the element. PostGIS GetTopoElements returns the primitives of a topogeometry with types number 1-3 corresponding to (1: nodes, 2: edges, and 3: faces). All the topoelements for neighborhoods and boroughs are type 3, which corresponds to a topological face. We can use the `ST_GetFaceGeometry <https://postgis.net/docs/ST_GetFaceGeometry.html>`_ to get a visual representation of these shared faces as follows:
 
12 days ago
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Which tells us that Queens and Brooklyn are in the middle of border wars. In this query we use the `GetTopoGeomElements <https://postgis.net/docs/GetTopoGeomElements.html>`_ function to declaratively inspect what components are shared across boroughs.
 
12 days ago
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Now we can express declaratively that boros are formed from a collection of neighborhoods by defining a column called *topo* in *nyc_boros_t* table that is of type POLYGON and is a collection of other topogeometries from *nyc_neighborhoods_t.topo* column.
 
12 days ago
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Topology
Topologie
a year ago
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Resource updated

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File postgis-intro/sources/locale/de/LC_MESSAGES/topology.po was added. a year ago
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String updated in the repository

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The result of the above is 29 neighborhoods were updated. If you rerun the border dispute queries for neighborhoods and boroughs, you'll find you have no more border disputes.
 
a year ago
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Removing elements from Topogeometries is handled using the `TopoGeom_remElement <https://postgis.net/docs/TopoGeom_remElement.html>`_ function. So lets get on with it, removing duplicaed elements from neighborhoods with the most amount of area as follows:
 
a year ago
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String updated in the repository

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There are a number of ways we could fix this. We could go out surveying asking people what neighbhood do they think they are standing in. Alternatively we could just assign slivers of land to the neighborhood with the least amount of area or to the highest bidder.
 
a year ago
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