map of road accidents using the police Stats19 data and OpenStreetMap.

#EDIT: replaced original monochrome with colour version.

Mapped and rendered in QGIS 2.4 using the Print Composer.

Method: buffered each accident site by 20m, and used "points in polygon" to count how many accidents happened within 20m of each site. Then used data driven properties to scale each accident site using log10("PNTCNT")*3, and Symbol Levels to make sure the blackspots are shown on top.

End result is similar to Heatmap, but looks better when zoomed in IMO. Best viewed Large or Original sizes.

Tags:   QGIS openstreetmap london road accident statistics STATS19 blackspots map cartography EDIT:

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Extract from PLUTO data set (www.nyc.gov/html/dcp/html/bytes/dwn_pluto_mappluto.shtml) - buildings shaded blues through red. Darker blues being pre 1900, lighter blues pre 1950, lighter reds 1950-1980 and red becoming darker through late 20th Century through to 2013.

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Household Income profiles of recent movers across Sydney (Origin and Destination). Colours set using Addition to Layers.

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Following the inspiration of UndedarkGIS I decided to use QGIS to do a map of Cascais, Portugal, inspired in old hand draw maps. This was done in QGIS 2.2, and besides the (already known) blending modes with some backgroud texture, I used Inside only outlines to give some expression to green spaces and sea. This time with another (stronger) texture.

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Tags:   instagram app square square format iphoneography uploaded:by=instagram

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