QGIS Plugins planet. Using OSM data in QGIS is a hot topic but so far, no best practices for downloading, preprocessing and styling the data have been established. There are many potential solutions with all their advantages and disadvantages.

To give you a place to start, I thought I’d share a workflow which works for me to create maps like the following one from nothing but OSM: Getting the data. Raw OSM files can be quite huge. That’s why it’s definitely preferable to download the compressed binary . XML . osm format. As a download source, I’d recommend Geofabrik. The area in the example used in this post is part of the region Pays de la Loire, France. Preparing the data for QGISIn the preprocessing step, we will extract our area of interest and convert the .

QGIS. This can be done in one step using ogr. C: \Users\anita. You can find it here for future reference: For the first step: extracting the area of interest, we need Osmosis. Unpack to use. Requires Java.)When you have Osmosis ready, we can extract the area of interest to the . C: \Users\anita. Luckily, that’s easy using ogr. C: \Users\anita. Instead, there are “coastline” line features.

Most river polygons are missing. Instead there are “riverbank” line features.

Luckily, creating the missing river polygons is not a big deal: First, we need to select all the lines where waterway=riverbank. Then, we can use the Polygonize tool from the processing toolbox to automatically create polygons from the areas enclosed by the selected riverbank lines. Therefore, before we can use the Polygonize tools, we have to close the area.

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To do that, I suggest to first select the coastline using . Then polygonize. Styling the data. Now that all preprocessing is done, we can focus on the styling.

You can get the styles used in the map from my Github QGIS- resources repository: osm.

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