OpenStreetMap service by CYBERTEC
In response to repeated customer requests seeking spatial datasets based on the OpenStreetMap service, CYBERTEC decided to start an initiative to address this demand. CYBERTEC implemented a “download OpenStreetMap” service which periodically generates extracts of OpenStreetMap data in various forms, and outputs the data as an sql dump to streamline and simplify its usage. Extracts […]
PostGIS upgrade with Ubuntu 20.04.02
Last time, we installed PostGIS on top of PostgreSQL. Today, I will complement this article by describing how someone can upgrade PostGIS on Ubuntu. A detailed description can be found at postgis.net and should be referred to in parallel. Let me first define our scenario and goal: An artificial customer wants his PostGIS-enabled PostgreSQL 13 […]
PostGIS setup with Ubuntu 20.04.2
PostGIS setup with Ubuntu 20.04.2 In one of his last blogposts, our CEO Hans-Jürgen Schönig explained how to set up PostgreSQL on Ubuntu. He consciously avoided any discussion of how to deal with our beloved PostGIS extension. Let’s fix that up right now by following these steps to implement PostGIS setup: Status quo assessment Setup […]
Publishing maps with Geoserver and PostGIS
Analysing data within PostGIS is just one side of the coin. What about publishing our datasets as maps that various clients can consume and profit from? Let’s have a look at how this can be accomplished with Geoserver. Geoserver acts in this regard as a full-fledged open source mapping server, supporting several OGC compliant services, […]
Traveling Salesman problem with PostGIS and pgRouting
Last time, we experimented with lesser known PostGIS functions to extract areas of interest for sales. Now, let’s extend our example regarding catchment areas by optimizing trips within the area of interest we generated in our previous example, which is around Hamburg. Let’s ask the following question: which order should we visit our major cities […]
“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 […]
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 […]
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 […]
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 […]
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 […]