Spring at the Gulf of Bothnia

The spring is coming to Finland and meltwater is running through rivers into the Baltic Sea. The exceptionally cloudfree Landsat 8 imagery from 2016-04-14 shows beautiful features in the Gulf of Bothnia near the Finnish coastline. Some remaining ice cover still exists at the Bothnian Bay, but algae has already begun to form at the Archipelago Sea.

 

Below is a zoomable natural color composite of the Landsat 8-imagery in 30 m resolution:


Geocachers view of the Southern Finland

This is how the Southern Finland looks like to a geocacher.

Adventures

Below is a time-lapse video of all hidden caches. Each dot is a hidden cache, red dots are new caches each day. Lots of adventures available, though this might not say much to non Finns. You may want to switch to a full screen view to see the details.

Augmented historical maps

There is a set of old city maps of Turku (Finland) at Kapsi. As a resident, those maps are interesting in their own right, but when they are georeferenced, a whole new world of opportunities open up.

So I opened up QuantumGIS and georeferenced the maps of Turku from 1888 and 1950, and overlayed the current transportation network on the hand-drawn maps from the past. It’s nice to notice that the old main transportation pathways (bridges, roads to other cities) and landmarks are still in place and in everyday use!

City map of Turku from 1888 augmented with transportation network from 2015
City map of Turku from 1888 augmented with transportation network from 2015 (click to enlarge).

 

The city map of Turku from 1950 augmented with transportation network from 2015
The city map of Turku from 1950 augmented with transportation network from 2015 (click to enlarge)

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