5 ms·
Didn't notice the tool jumping around till you pointed it out; now I can't stop seeing it. Pushing against left and bottom would definitely be better, especiall
by 1wheel 13y ago
Didn't notice the tool jumping around till you pointed it out; now I can't stop seeing it. Pushing against left and bottom would definitely be better, especially since there isn't much to see there.
Embarrassingly, I'm not sure what the projection is. The data is described as 'estimates of human population for the years 1990, 1995, and 2000 by 30 arc-second (1km) grid cells'. I did some aggregation to reduce the file size and then just converted that grid to pixel values stretched across the screen:
y = d3.scale.linear()
.domain([0, longitudes.length])
.range([0, height]),
http://sedac.ciesin.columbia.edu/data/set/grump-v1-population-count http://sedac.ciesin.columbia.edu/data/set/grump-v1-populatio...
- Cogito 13y agoI found the projection on the GRUMP FAQ page[0]. Turns out they don't use a projection: *Projection: None, the data is in Geographic (latitude/longitude)* and so the resulting map is similar to the Mercator. I wonder how easy it is to map lat/long co-ordinates into different projections - would be a cool option to have on all similar maps. [0] http://sedac.uservoice.com/knowledgebase/articles/41635-what-is-the-projection-used-for-the-data http://sedac.uservoice.com/knowledgebase/articles/41635-what...
- danpat 13y agoUse Proj.4: http://trac.osgeo.org/proj/wiki/man_proj http://trac.osgeo.org/proj/wiki/man_proj or, just take a raster image (PNG) and warp it: http://www.gdal.org/gdalwarp.html http://www.gdal.org/gdalwarp.html