Tutorial Archives - Digital Geography

Fractal dimensions or how to generalize geometries in Python and how it affects data

For todays 30dayMapChallenge: Process I was processing a coastline dataset for Norway, trying to find out about the fractal dimension. osmdata.openstreetmap.de has a nice extract of this here:…

Post author By Riccardo

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…

Post author By Riccardo

Some ways to produce topographic swath profiles

For a geomorphological study that I am working on I want to produce topographic swath profiles across a mountain range, that is, I want the average elevation along…

Post author By Christoph Grützner

Geocoding in GIS: ArcGIS, QGIS, Leaflet

The recent move from the Mongolian Post to use W3W as their new address system shed a new light on the question: Where are addresses located and how…

Post author By Riccardo

PostgreSQL and PostGIS: A brief introduction

You probably seen this already (maybe on your very own PC as well): A folder with shape files. Well we’re living in the 21st century and I do…

Post author By Riccardo

Accessing Landsat and Sentinel-2 on Amazon Web services

The cloud has made it easier to process large amount of data, and satellite imagery processing benefits from cloud processing too. One of the cloud services that offers…

Post author By Annekatrien

Filter Leaflet Maps with a Slider

If you create maps you always need to ask yourself: how can I make it as easy as possible to read and still have anything I need in…

Post author By Riccardo

How to create mountain ranges in QGIS?

Last time we had the task to create mountain ranges polygons for the whole world. I prepared a small tutorial referred to that. Maybe you can find something…

Post author By Karolina

Sentinel-1 image over the Netherlands (c) ESA

Downloading Sentinel satellite imagery

Sentinel is the buzzword for a series of Earth observation missions like Sentinel-1 (Land and Ocean monitoring,launched in April 2014), Sentinel-2 (land monitoring, launched in June 2015) and…

Post author By Annekatrien

Interchange between the 3rd Ring Road and Airport Expressway.

What is better: a map or a picture?

I was reading an article entitled “China, the megalopolis of 110 million inhabitants that impresses the world” on a popular online journal (see article) and after a dozen…

Post author By PJ Hooker

Routing in QGIS… with OSM

Routing with Google is quite cool as the database/network is probably the best currently available. But the terms of services limit the possible usage. So what about OpenStreetMap?…

Post author By Riccardo

Routing in QGIS … with Google

Routing in QGIS was, as far as I know, always dependent on an available network. Either you had some database which was pgrouting enabled, or you had some…

Post author By Riccardo