Street Atlas (or Battleship) grids in QGIS 2.18

ICES rectangle map

Another guest blog from Liam Mason, based on his lightning talk at the 8th Scottish QGIS user group. You can follow Liam on Twitter via @marinemaps


D5. Miss.

A2. Hit. You’ve sunk my battleship! 🙁

If you’ve used a street atlas or played the boardgame Battleship, you’ll be familar with grid systems using letters for the horizontal (x) coordinate and numbers for vertical (y) coordinate.

Whilst these grids don’t have the resolution of a coordinate system like latitude/longitude or eastings/northings, they allow readers to quickly identify where a street is located on an atlas, or a ship on a boardgame.

Battleship boardgame
Battleship is now geohipster, embracing the hexgrid

Creating these type of grids in QGIS takes advantage of the grid options in composer, the @gridnumber attribute, and a wee bit of maths. Continue reading “Street Atlas (or Battleship) grids in QGIS 2.18”

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3D mapping and bathymetry styling with QGIS 2.18

This is a guest blog from Liam Mason, a spatial analyst with Marine Scotland.  Some of his other data visualisations can be seen on his @marinemaps Twitter account or the Marine Scotland Maps portal maps.marine.gov.scot


[Edit: the tutorial was modified to use the GDAL-based DEM (Terrain Analysis) tools instead of Raster Terrain Analysis]

I love mapping bathymetric data in 3D. It’s almost magical, the ability to draw back the veil of the sea and reveal the mysterious landscapes below.

Yet, it’s remarkably simple to do using QGIS 2.8 or higher.

3D bathymetry map of inner Firth of Forth.
Bathymetry of inner Forth made using QGIS 2.8 and qgis2threejs

Continue reading “3D mapping and bathymetry styling with QGIS 2.18”

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