Mapping tweets with QGIS

If you look at the QGIS plugins repo, you can spot a plugin called twitter2qgis.I’ve wanted to test it for quite some time but I never managed to install tweepy, a prerequisite for the plugin, properly.Then I found this guide and decided to have a look.

Seems like the options are to map tweets based on two search criteria: bounding box or keywords. I only mapped some tweets, 50 or so, as the plugin is pretty slow, at least on my computer. Still, a nice tool! Wish someone would make one suitable for Instagram: there’s probably a better chance to find geotagged material.

Tweetytyy!

Tweetytyy!

Mainokset

Helsinki metropolitan area service area comparisons

I just tested the OSM route plugin for QGIS. A really nice plugin by the way! I was curious to see how a service area calculation (for cars) made with the plugin differs from one made with the MetropAccess Travel Time Matrix. The latter offers a more realistic result, as it e.g. takes into account the fact that you sometimes have to actually use the break pedal of your car as well.

OSM route 30 minute service area for Ympyrätalo.

OSM route 30 minute service area for Ympyrätalo.

MetropAccess Travel Time Matrix 30 minute service area for Ympyrätalo.

MetropAccess Travel Time Matrix 30 minute service area for Ympyrätalo.

I’ll probably try to visualize the differences of these service areas later.

Tanaka contours Helsinki edition

I stumbled upon this nice tutorial about illuminated contours. I decided to give it a go as well, see how central Helsinki looks like. I used the 2 m DEM produced by the National Land Survey of Finland.

Tanaka Helsinki edition

Tanaka contours Helsinki edition. Source data: NLS2015

Maybe an urban area was not the best choice for testing. I added a hillshade model on top of the original DEM as well to enhance the vertical variations a bit more.