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    Posts

    11.02.2021 | Florian Nadler

    “Catchment areas” with PostgreSQL and PostGIS

    Recently a colleague in our sales department asked me for a way to partition an area of interest spatially. He wanted to approximate customer potential and optimize our sales strategies respective trips. Furthermore he wanted the resulting regions to be created around international airports first, and then intersected by potential customer locations, in order to […]

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    28.04.2020 | Florian Nadler

    Intersecting Tracks of individuals – MobilityDB

    Last time I announced to checkout MobilityDB to improve our approach to extract overlapping passage times of healthy and infected individuals – here we go! MobilityDB itself is a PostgreSQL extension built on top of PostGIS, specializing on processing and analysing spatio-temporal data. To do so, the extension adds a bunch of types and functions […]

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    14.04.2020 | Florian Nadler

    Intersecting GPS-Tracks to identify infected individuals

    In times of COVID-19, governments contemplate tough measures to identify and trace infected people. These measures include the utilization of mobile phone data to trace down infected individuals and subsequently contacts to curb the epidemic. This article shows how PostGIS’ functions can be used to identify “overlapping” sections of infected and healthy individuals by analysing tracks […]

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    25.02.2020 | Florian Nadler

    Visualizing OSM data in QGIS

    Last time we imported OpenStreetMap datasets from Iceland to PostGIS. To quickly visualize our results, we will now use QGIS to render our datasets and generate some nice maps on the client. Let’s start with our prerequisites: A PostGIS enabled PostgreSQL database preloaded with OpenStreetMap datasets as described in blogpost https://www.cybertec-postgresql.com/en/open-street-map-to-postgis-the-basics/ An up and running […]

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    13.11.2019 | Florian Nadler

    Open Street Map to PostGIS – The Basics

    OSM to PostGIS – The Basics Ever wondered how to import OSM (OpenStreetMap) data into PostGIS [1] for the purpose of visualization and further analytics? Here are the basic steps to do so. There are a bunch of tools on the market— osm2pgsql; imposm; ogr2org; just to mention some of those. In this article I […]

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