About me on Jakob Miksch

Random Geodata Generator

Sun, 28 Jul 2024 00:00:00 +0000

For software development, I often need different geodata sets for testing. So far, I have created these with geojson.io or QGIS or downloaded data from OpenStreetMap or Natural Earth. However, I had a use case where I needed data from specific regions. And ideally not only in WGS84, but also in the respective UTM projection for the region. Since there is no such tool to my knowledge, I wrote it myself. The code is available as open source on github.com/JakobMiksch/random-geodata.

Update an OSM database with osm2pgsql

Sat, 12 Nov 2022 00:00:00 +0000

With osm2pgsql it is possible to load data from OpenStreetMap into a PostGIS database. The data can then be processed and analyzed with the full power of spatial SQL. Programs like QGIS, GeoServer or MapServer can read that database and render it on a map. A very impressive feature of osm2pgsql is to keep the database up-to-date with the latest changes from OpenStreetMap. This is done by the commandline tool osm2pgsql-replication (see docs). It checks from which source your initial data comes from and downloads the respective changesets.

Extracting Points from Polygons using osm2pgsql and PostGIS

Sat, 24 Sep 2022 00:00:00 +0000

A common use case for OpenStreetMap is extracting POIs (points of interest). This is easy for points that are modelled as nodes. However, some features of interest actually appear in the shape of polygons (and sometimes even lines). A typical example is a building (polygon) that is tagged as supermarket, but in our case we are only interested in a single point and not in the shape of the geometry.

exa - An Alternative to ls

Fri, 03 Sep 2021 00:00:00 +0000

I just discovered the commandline tool exa. It serves as a modern replacement for ls and tree. Additionally it shows little icons of the filetype in its output.

To use it it you can simply download the binary from the release page and add it to your PATH.

To make it work with my setup I had to add these aliases:

alias ls="exa --icons --group-directories-first"
alias la="ll -a"
alias tree="exa --tree"

The standard font on my Debian/Ubuntu system does not show all icons. Therefore another font is needed. A font from Nerd Fonts can be used. To download them is described in this gist:

GeoSpatial Commandline Tools

Sun, 21 Feb 2021 00:00:00 +0000

Based on the overwhelming response of the this tweet, I started a list of geospatial commandline tools.

It can be found in this git repository: https://github.com/JakobMiksch/geospatial-cli Everyone is welcome to use it and contribute. It is CC0 licensed.

GDAL/OGR - Automated Geodata Processing

Fri, 20 Sep 2019 00:00:00 +0000

This blogpost gives in an introduction to GDAL/OGR and explains how the various command line tools can be used.

GDAL/OGR is a library that can read many different vector and raster formats. It is written in C/C++ and is published under a Open Source licence. It can also be accessed with other programming languages like Python or R. There are numerous programs for the command line which will be described in more detail in this blog post.

The OpenStreetMap Ecosystem

Fri, 26 Oct 2018 14:15:09 +0100

OpenStreetMap (OSM) is a project that aims to create a common database for geodata. The data can be displayed on a map, but that is by far not its only purpose. Within the past years an ecosystem of programs, services and tools has evolved around OSM. This blog post explains the basic concepts of OpenStreetMap and gives an overview how to view, edit, download and process the data.

You can also watch this presentation which covers the same topic.

Route Planning with OpenStreetMap

Mon, 22 Jan 2018 12:15:09 +0100

This blog post gives an overview of how to perform route planning :running: :bike: :car: with OpenStreetMap (OSM) data. In beginning, some basics about route planning will be explained. Afterwards, the routing engines GraphHopper, pgRouting and the routing web service OpenRouteService will be described in more detail.

OpenStreetMap is perfectly suited for route planning applications because the data quality of the street network is usually very satisfying. This has two reasons: Streets can easily be mapped from satellite imagery and GPS-tracks. Moreover, errors can be discovered quickly because they cause unrealistic routing results.

Mon, 01 Jan 0001 00:00:00 +0000

Talks

2025

(de) Datenbankschema mit Mermaid visualisieren

FOSSGIS-Konferenz, Münster ⓘ 📑 🎬
(de) GDI per Knopfdruck: Automatisierung mit DevOps und Infrastruktur als Code

FOSSGIS-Konferenz, Münster ⓘ 📑 🎬

2024

pg_featureserv - Publication of vector data with OGC API features

FOSS4G Europe, Tartu ⓘ 📑 🎬
OpenLayers and Vue

FOSS4G Europe, Tartu ⓘ 📑 🎬
DuckDB with Geodata

FOSS4G Europe, Tartu ⓘ 📑 🎬
Random Geodata Generator

FOSS4G Europe, Tartu ⓘ 📑 🎬
Geospatial Go

FOSS4G Europe, Tartu ⓘ 📑 🎬
QGIS Server in an enterprise environment

FOSS4G Europe, Tartu ⓘ 📑 🎬
(de) osm2pgsql - OSM Daten mit PostGIS verarbeiten

FOSSGIS-Konferenz, Hamburg ⓘ 📑 🎬
(de) QGIS Server - Einsatz im Unternehmen

FOSSGIS-Konferenz, Hamburg ⓘ 📑 🎬
(de) Geodaten mit DuckDB verarbeiten

FOSSGIS-Konferenz, Hamburg ⓘ 📑 🎬
(de) GIS mit Go

FOSSGIS-Konferenz, Hamburg ⓘ 📑 🎬
(de) pg_featureserv - Veröffentlichung von Vektordaten mit OGC API Features

FOSSGIS-Konferenz, Hamburg ⓘ 📑 🎬

2022

(de) Web-APIs für geographische Anwendungen - Ein Überblick

FOSSGIS-Konferenz, (remote) ⓘ 📑 🎬
(de) Webmaps einfach erstellen mit Wegue (OpenLayers und Vue.js)

FOSSGIS-Konferenz, (remote) ⓘ

2021

(de) Webmaps effizient mit Wegue erstellen

FOSSGIS-Konferenz, (remote) ⓘ 📑 🎬
(de) GIS mit der Kommandozeile

FOSSGIS, (remote) ⓘ 📑 🎬
(de) Wer hat an der Uhr gedreht? - Zeitbasierte Geodaten modellieren, abfragen und visualisieren

FOSSGIS-Konferenz, (remote) ⓘ 📑 🎬
Web APIs for geospatial applications

lecture, University of Salzburg, (remote) 📑

2020

(de) Einführung zu GDAL/OGR: Geodaten mit der Kommandozeile verarbeiten

FOSSGIS-Konferenz, Freiburg ⓘ 📑 🎬

2019

(de) Malawi Atlas - eine SDI mit PostGIS, GeoServer und GeoExt

FOSSGIS-Konferenz, Dresden ⓘ 📑 🎬

Imprint

Mon, 01 Jan 0001 00:00:00 +0000

Jakob Miksch
Schwalbenweg 43
69123 Heidelberg
E-Mail: info@jakobmiksch.eu

Angaben gemäß § 5 TMG

Jakob Miksch
Schwalbenweg 43
69123 Heidelberg

Kontakt

E-Mail: info@jakobmiksch.eu

Redaktionell verantwortlich

Jakob Miksch

Quelle: https://www.e-recht24.de/impressum-generator.html