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Monthly Archives: April 2010
use and abuse of elevation contours
I’d never really looked at elevation in GIS data before, mainly because the data sets are big and I didn’t understand the format. I believe that in GeoGratis, NTDB and its successor CanVec provide elevation data, but those are vector … Continue reading
Taking geotagged pictures with your Blackberry
Note: I’ve had reports that some carriers seem to disable GPS service within their service area. I’ve certainly seen slight differences as to how this works on different carriers. Most recent camera-equipped Blackberrys have a GPS built in. One of … Continue reading
three norths to choose from
North is a slippery thing, a trickster. There are at least three norths to choose from: Magnetic north – where the compass needle points. Currently way in the northwest of Canada, it’s scooting rapidly towards Siberia. Come baaack, magnetic north! … Continue reading