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Showing posts from August, 2016

Adventures in QGIS continued

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I'll do some how to guides on my experiments in QGIS with historical maps soon, but here's an aide memoire of the tutorials I've used:

Creating a heat map:
http://www.qgistutorials.com/en/docs/creating_heatmaps.html

Creating a contour map:
http://www.qgistutorials.com/en/docs/working_with_terrain.html




And to show that I'm just messing around and not doing this systematically, here's my failed experiment to warp geo-referenced maps onto a DEM (elevation) layer:

Apparently north Manchester has a mountain range according to this...

digital mapping experiments in QGIS

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I've been messing around with QGIS and old maps of Manchester. My approach at the moment is 'layer as many maps as I can find' and 'add as many different databases as I can' on the map and see what happens. I'll add some contextual and analytical information in another post.

Here's a link to a simple map of Manchester (click on the expander on top right to layer a tile of Green's 1794 map on it), and the addresses of United Englishmen layered on it:


There's a plugin in QGIS called QGIS2threejs which makes it easy to make elevations and buildings in 3D.
So here's my slightly strange attempt to make Murray's Mills in Ancoats, together with a pub and some terraces, into 3D:


Another plugin allows you to draw cartograms.
Here's a gif comparing a straight map of Manchester police districts, coloured according to their population density in 1831, with a cartogram (i.e. the areal size and shape of each district is warped according to the densi…