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Mastering PostGIS

You're reading from   Mastering PostGIS Modern ways to create, analyze, and implement spatial data

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Product type Paperback
Published in May 2017
Publisher Packt
ISBN-13 9781784391645
Length 328 pages
Edition 1st Edition
Languages
Tools
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Authors (4):
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George Silva George Silva
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George Silva
 Mikiewicz Mikiewicz
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Mikiewicz
Michal Mackiewicz Michal Mackiewicz
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Michal Mackiewicz
 Nycz Nycz
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Nycz
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Toc

Table of Contents (9) Chapters Close

1. Importing Spatial Data FREE CHAPTER 2. Spatial Data Analysis 3. Data Processing - Vector Ops 4. Data Processing - Raster Ops 5. Exporting Spatial Data 6. ETL Using Node.js 7. PostGIS – Creating Simple WebGIS Applications 8. PostGIS Topology 9. pgRouting

Exporting vector data using pgsql2shp


pgsql2shp is a command-line tool that can be used to output PostGIS data into shapefiles. Similarly to outgoing \COPY, it can either export a full table or the result of a query, so this gives us flexibility when we only need a subset of data to be outputted and we do not want to either modify the source tables or create temporary, intermediate ones.

pgsql2sph command line

In order to get some help with the tool just type the following in the console:

pgsql2shp

The general syntax for the tool is as follows:

pgsql2shp [<options>] <database> [<schema>.]<table>
    pgsql2shp [<options>] <database> <query>

Shapefile is a format that is made up of a few files. The minimum set is SHP, SHX, and DBF. If PostGIS is able to determine the projection of the data, it will also export a PRJ file that will contain the SRS information, which should be understandable by the software able to consume a shapefile.

If a table does not have...

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