GIS

Working with the global Building Footprints data

The open building footprints, released by Bing Maps, is a great data set. However, it is not an easy one to work with. You can download GeoJSON files for each country separately, but even so, they are too large to work with. Luckily, with just a few lines of code, you can split the file in manageable chunks that are easier to deal with. Read on to see how.

Upload raster labels to a point layer attribute table

Introducing the v.what.rast.label addon. An little utility to sample the raster values and labels at point locations defined by a vector point layer. Values and labels are written to the attribute table of the point layer.

Playing with animal tracking data in QGIS

Using the Temporal Controller in QGIS to visualize the movements of cattle in the Logone Floodplain in Cameroon. Based on data from the Movebank, a free, online database of animal tracking data.

Distance between features

Calculating the distance between features (points, polygons, lines) is a common GIS task. In this tutorial I will calculate the nearest sighting of mountain lions to Minnesota in GRASS GIS

Dashboards and online maps

Exploring the possibilities to publish your maps and other content online

GISQuick

There are several ways you can publish or share your maps, created in QGIS, online. One very easy way is to use the Gisquick publishing platform. It basically requires two steps only; create a QGIS project, and upload it

Import NASA DEM in GRASS GIS

The NASADEM_HGT dataset is a 1 arcsecond void-filled dataset which combines data from the SRTM and ASTER GDEM data. It can be downloaded from EarthData in 1° by 1° tiles. But if you are using GRASS GIS, downloading is greatly fascilitated using the r.in.nasadem addon. The addon imports all NASADEM tiles covering the current region or region extents given with the region option into GRASS and patches the tiles together.

Legend for continuous raster in QGIS composer

This blogpost shows in a few steps how to add a continuous colour legend for a raster layer in a map layout in QGIS. It is a work around, but it works.

Creating a map with inset using tmap

Plotting maps with tmap Get the libraries Main map Inset map Create the final map All the code Plotting maps with tmap Figure 1: A map of the distances to the nearest Natura2000 areas in a region in the central Oder basin.

De Grote Geo Show

The Grote Geoshow is a Dutch show on Twitch (live) and YouTube by the OSGeo.nl foundation and friends. It airs every Thursday afternoon and is all about open geo topics.