Initial Map Warper test with kite imagery
We’re working to process and rectify all the imagery we captured on Thursday, but here’s an initial attempt at rectifying an image. I must admit I was initially discouraged that the Google map seemed pretty decent (it’s supplied by DigitalGlobe) but now that I’m trying to actually rectify images against it, it’s really almost unusable!
I can’t see any useful detail, and almost all of the houses have moved or changed… about one in a hundred roofs match up, making it very difficult to rectify. I think we need one really good very high altitude shot to fix our overall layout, then we can rectify the lower altitude, higher detail imagery. We’ll try Tuesday afternoon.
Tags: juanpabloii, lima
January 16th, 2010 at 8:41 am
Stuart Gill from the World Bank has been asking whether we can tell what buildings are made of – and we almost can from this height. Roof material can be seen, and from some of the sideways images (like this one; see more at the Flickr feed) we can definitely make out wood/brick/plastic. But I’m hoping we can run around with the kids and do a quick survey of building materials anyways.
January 24th, 2010 at 10:08 am
A great idea with the balloons! Im working on a project that requires georeferencing, so this post caught my eye. Grass GIS (open source GIS) has a georeferencer utility and MapAnalyst (http://mapanalyst.cartography.ch/index.html) can calculate distortion.