In the Netherlands, currently there is a movement to make more and more data available for the general public. This is done via different services: WMS, WMTS and WFS services via a service called PDOK (Publieke Data Op de Kaart). While creating a plugin to list and load all those layers in QGIS I had [...]

Last weekend there was a user on the QGIS users list mailinglist asking the question if QGIS had something similar like the .lyr file in the ESRI world. I knew that you could save and re-use the styling of a layer in QGIS by saving a style as a .qml style file. BUT I was [...]

If you want to influence the locations where labels, symbols or diagrams are displayed within areas, it is useful to have a separate layer with centroids. This article demonstrates how such a map layer can be created and modified in … Continue reading →

Sometimes you need to produce a series of similar thematic maps. The only difference is the field used to colour areas or show graduated symbols. Classifications or maximal symbol sizes are identical. For large numbers of maps it is quite … Continue reading →

As of July 2012, Dutch Geo-office Kadaster has published an update of the Top10NL topographic GIS data set. Areas of central-NL + Rotterdam have been updated. Some ‘holes’ in the terrain have now been corrected, and the new industrial port … Continue reading →

In response to my previous article about joining data from a csv file, I received a very good tip. From QGIS 1.8 Excel files can be opened directly in QGIS. Strange enough, nothing is mentioned about this in the ‘release … Continue reading →

Sorry, this entry is only available in the Dutch language

Sorry, this entry is only available in the Dutch language

In a previous article I have shown how data from a text file with points can be displayed as an additional layer on top of a layer consisting of areas. There was no connection between de data from both layers. … Continue reading →

GDAL and OGR (www.gdal.org) libs from Frank van Warmerdam are famous software libraries which make it possible in the Open Source world to read and write a plethora of gis file formats. The nice thing about QGIS is that it … Continue reading →

Most of the Windows users will install QGIS via the so called ‘stand alone installer’ which they download from download.qgis.org. For most of the users this is the easiest and most well know way to install a desktop program. But … Continue reading →

This article describes how to create a map with bar charts and a legend. Required software Quantum GIS (qgis.org) LegendSVG (qgis.nl) Inkscape (optional) (inkscape.org) Required files Map layer with areas Map layer with data As an example, a vector map … Continue reading →

Sometimes you find new QGIS functionality when a user asks you a question. Somebody working with house geometries was looking for a way to copy the same attributes to a set of selected houses. He was looking if certain types … Continue reading →

When opening a geo-file for the first time in QGIS, random colors are assigned to the points, lines, and polygons. QGIS offers excellent features to design and use color style schemes. This article describes how to do this, with the … Continue reading →

QGIS has something called forms to make it easier to change te attributes of an object. This article is about the use of these forms. As exampel we use a dutch dataset of the houses of the netherlands (BAG) which … Continue reading →

QGIS does not create a proper legend for maps with pie charts or circles with variable size. I wrote a program to produce legends in Scalable Vector Format (SVG). In the QGIS Composer, the result can be added to the … Continue reading →

Sorry, this entry is only available in the Dutch language

Sorry, this entry is only available in the Dutch language