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Posts about Spatial

  • 8 min read

    Loading Data into PostGIS: An Overview

    Kat Batuigas

    There are a lot of ways to load data into a PostgreSQL/PostGIS database and it's no different with spatial data. If you're new to PostGIS, you've come to the right place. In this blog post, I'll outline a few free, open source tools you can use for your spatial data import needs.

    You can use a desktop GUI application like QGIS, and/or command-line utilities. If you want more flexibility, it's great to have both types in your toolkit.

    I'll talk about importing to PostGIS within the context of vector data, since it's a much more common use case. It's possible to import raster data

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  • 11 min read

    PostGIS Raster and Crunchy Bridge

    Paul Ramsey

    The PostGIS raster extension has a steep learning curve, but it opens up some unique possibilities for data analysis and accessing non-standard data from within PostgreSQL. Here's an example that shows how to access raster data from PostGIS running on Crunchy Bridge

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  • 4 min read

    Waiting for PostGIS 3.1: GEOS 3.9

    Paul Ramsey

    While we talk about "PostGIS" like it's one thing, it's actually the collection of a number of specialized geospatial libraries, along with a bunch of code of its own.

    • PostGIS provides core functionality
      • bindings to PostgreSQL, the types and indexes
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  • 7 min read

    PostGIS Day 2020 Roundup

    Kat Batuigas

    Crunchy Data's second annual PostGIS Day took place a couple weeks ago on November 19th, and as a first-time attendee I was blown away by the knowledge-sharing and sense of community that I saw, even as I was tuning in remotely from my computer at home. This year's PostGIS Day

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  • 2 min read

    Waiting for PostGIS 3.1: Grid Generators

    Paul Ramsey

    Summarizing data against a fixed grid is a common way of preparing data for analysis. Fixed grids have some advantages over natural and administrative boundaries:

    • No appeal to higher authorities
    • Equal unit areas
    • Equal distances between cells
    • Good for passing data from the "spatial" computational realm to a "non-spatial" realm
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  • 3 min read

    Waiting for PostGIS 3.1: Performance

    Paul Ramsey

    Open source developers sometimes have a hard time figuring out what feature to focus on to generate the greatest value for end users. As a result, they will often default to performance.

    Performance is the one feature that every user approves of. The software will keep on doing all the same cool stuff, only faster

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  • 4 min read

    Virtual PostGIS Day 2020 is Nov. 19

    Crunchy Data

    Authored by Steve Pousty

    Today we are going to talk a little bit about spatial databases and a virtual event Crunchy Data is hosting with several friends and community members. We're putting together an awesome PostGIS Day

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  • 14 min read

    Using Postgres and pgRouting To Explore The Smooth Waves of Yacht Rock

    John Porvaznik

    pgRouting is a powerful routing tool, usually used for pathfinding/mapping/direction applications. (See Paul Ramsey's introduction to pgRouting here). It is, however, also a robust graph db implementation, and can be used for much more than just finding the directions to your great aunt Tildy’s.

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  • 4 min read

    PostGIS and the Geography Type

    Paul Ramsey

    PostGIS is a "geospatial database" and the "geo" in "geospatial" is an important qualifier: it means that all the coordinates in PostGIS point, lines, and polygons can be located somewhere on the earth.

    As we all know (except for a few of us

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  • 10 min read

    Using the Crunchy PostgreSQL Operator with PostGIS

    Steve Pousty

    In today's blog post I am going to show you how to easily spin up PostGIS in your Kubernetes or OpenShift cluster using the PostgreSQL Operator

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