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Category Archives: GIS
QGIS: Getting your ClickFu back
Since QGIS 1.8 took the rather boneheaded move of hiding all the plugin sources except the official one, here’s how to get the other repositories back: Consult the External Author Repositories list In QGIS, go to Plugins -> Fetch Python … Continue reading
GeoURIs for fun and profit
Behold the GeoURI: geo:37.22976,-93.28663 It’s just a simple lat/long pair which some browsers (mostly mobile) will parse as locations. It probably won’t work in your desktop browser, but here’s an example as a link: Askinosie Chocolate — Springfield, MO. You … Continue reading
Styling GeoBase land cover data
GeoBase provides the free Land Cover, Circa 2000 – Vector product which contains 1:250,000 land cover categories (water, ice, crops, urban, trees, …) for all of Canada. It has some use in wind energy development, as you can use it … Continue reading
Making weird composite shapes with Shapely
Let’s say you operate microwave radio links, and you want to see if you could build a link between, say, the huge comms tower at Clear Creek, ON and your tower just south of Aylmer. You know that Erie Shores … Continue reading
Awesome USGS orthoimagery … in Canada?
Detail of Erie Shores Wind Farm showing USGS orthophotos from WMS I was trying to do some OpenStreetMap edits in rural southern Ontario, but the default Bing background aerial imagery is very poor. Clicking around in semi-plokta mode to find … Continue reading
geocoder.ca’s excellent database
geocoder.ca provides a crowdsourced postal code geocoder under the ODbL. You can download the database as CSV directly. Here’s a bash script to convert that text file into a (very large) point shapefile: Though the script is a bit Unix-centric, … Continue reading
Georeferencing QGIS output rasters
Some of the design packages I rely on use very crude GIS facilities. In fact, all they can support is a georeferenced raster as a background image, so it’s more of a rough map than GIS. It helps if these … Continue reading
Toronto Data really open
Looks like the data sets at toronto.ca/open might finally actually be open; that is, usable in a way that doesn’t bind subsequent users to impossible terms. The new licence (which unfortunately is behind a squirrelly link) basically just requires you … Continue reading
we can has street names
Pierre Béland reminded the Canadian OSM group of the GeoBase WMS, which has all the NRN road names in it. Here’s my neighbourhood’s OpenStreetMap data with the road names overlaid.