Map Challenge – Day 2 (lines): Straightening the A2
Day 2 of the 30daymapchallenge focused on cleaning and preparing the A2 motorway data before creating a straightened schematic line. Raw geospatial data is rarely perfect, and getting…
🗺️ Turning a Simple Excel Table into a Map — My #30DayMapChallenge Story
For this year’s #30DayMapChallenge day one points, I wanted to do something lightweight:just take one of those never-ending Excel tables that everyone in GIS seems to have lying…
Create Pseudo 3D Topographies in QGIS
John Nelson did it again and amazed us by recreating AI topographic images with ArcGIS Pro. He showed the process in his latest youtube video. You may ask…
Create your own vector basemaps the easy way
Basemaps are a web cartographers best friend, aren’t they. There are plenty of them online, ready to be embedded in your upcoming nice web map application. In this…
How to use PyQGIS as standalone script on Ubuntu
Today I wanted to hack together a standalone script using PyQGIS, the QGIS Python bindings, to write a small prototype. I hadn’t written such a standalone script yet,…
Joining Data with the Placekey QGIS Plugin
Placekey is a free address and point-of-interest (POI) matching tool that is now integrated with QGIS via the Placekey Connector Plugin. Placekey does the work of address and…
OSM, PostGIS and Docker: an approach for automatic processing
In the summer of 2019 Michael Marz started to extract most important items from OpenStreetMap and published those extracts as geopackages on his webpage. Back then I looked…
Automated UI tests with AutoIt for QGIS
I hate testing! Yet I do understand that it is crucial for a good software solution. As I am often confronted with GUIs, I asked myself how to…
qgis2web in the wild
There are plenty of webmapping services out there. The best known might be mapbox, carto, arcgis online, google maps. But what they all share: they do not come…
Run GIS functions directly in Python with GeoPandas
GeoPandas, once installed, supports you with a handfull of GIS functions in your Python notebooks and will leverage your work with geospatial data. But to be honest: this…
How to create a custom Web AppBuilder Widget for your Portal with ORS
In the recent years I often worked with ArcGIS Portal / Enterprise and fell in love with the idea of writing widgets which I can use in the…
GDEM V3 vs SRTM 1: a comparison
Some time has past since I last wrote a DEM comparison, comparing ALOS World with SRTM 1 and GDEM V2 with SRTM 3. But as NASA and METI…