Aerial photos   Leave a comment

I was out mapping again today (thanks to an enforced vacation from work), and I've finished over half of the map. I'm actually using aerial photos from Google Earth for the fieldwork – the orthophoto I got has more colour and better resolution, but has too much shade from the trees, while the Google photo seems to have been taken at high noon, which is perfect. The Google one is on the left:

I used OCAD to copy the contours and mark distinctive points on the map (mostly path junctions), and then I fitted sections from Google to create a basemap for the fieldwork. The contours aren't that good either – they're computer-drawn, and as our forests are evergreen the computer tends to miss anything under the tree cover. I've even seen it draw a road as a gully! But that's what fieldwork is for.

Posted 19/10/2008 by dchissick in Uncategorized

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