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Sun Nov 23 16:00:09 2014

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QGIS Planet

Visualize flows with FlowMapper

This article explains the presentation of flows on a map, using the FlowMapper plugin. For this demonstration, data on commuting patterns between 40 regions are used (from Statistics Netherlands). Preparing the data After the plugin is installed in the usual way, the manual can be found in the folder C:\Users\{username}\.qgis2\python\plugins\FlowMapper2_documentation.Three text files are required, with node […]

Generate series of maps with Python script

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 annoying to repeat the same actions in QGIS over and over again. Moreover, mistakes are […]

Generate a series of maps 2 (Linux)

In a previous article I described how you can let QGIS generate a series of thematic maps with a batch file. This method was meant for the Windows version of QGIS. Now I have written a similar shell script for Linux (‘projectsnapshots’). You can find it in the ZIP file included with this article. It […]

Graduated symbols

Graduated symbols are the best way to visualize absolute numbers like population size. Usually the area of the symbols is made proportional with the number to be displayed. This is especially important if the values are far apart. Methods QGIS 1.8 offers four methods to display graduated symbols. All can be found in the dialogue [...]

Generate a series of maps

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

Join data from a CSV file

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

Bar charts with legend

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

Create legend with LegendSVG

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

(Nederlands) Taartdiagrammen

(Nederlands) Data importeren

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(Nederlands) Middelpunten verplaatsen

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(Nederlands) Gebieden samenvoegen

Sorry, this entry is only available in the Dutch language

(Nederlands) Proportionele symbolen

Sorry, this entry is only available in Nederlands.

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