[Talk-GB] Aerial Photography
Chris Hill
osm at raggedred.net
Mon Sep 14 10:44:56 BST 2009
I used to hold a pilot's licence and I did some work photographing
archaeological sites. Photos taken pointing sideways are much harder to
work with than photos pointing straight down. Any kind of rectification
adds unwanted artifacts. I used to make high bank angle turns (60' bank
angle) over the feature I wanted to photograph which made it very easy
to photograph.
I was trying to photograph a small area in detail, so circling over the
feature helped. I was also using film (before widespread hi-res
digital), so there was a limited stock of film but the resulting image
was the equivalent of about 25mp. To reduce parallax I used a telephoto
lens.
It gives a very interesting overview, but it's not a patch on surveying
on the ground where you have access.
Cheers, Chris
Tristan Thomas wrote:
> I would be very interested to hear what people think of this effort.
> I'm currently studying to be a pilot & I know that many people who do
> fly routinely take aerial pictures of the landscape below, especially
> of towns etc. I know most of them would be more than happy to allow
> their photos to be used of OSM. If we could find a way to upload them
> somewhere, then I'm sure we could dramatically increase the aerial
> photography we have without having to pay to hire the planes or get it
> sponsored. I could just upload them all under one Flickr account for
> OSMers to look through & do some tracing if they wish, but it doesn't
> seem the most efficient way to do it?
>
> Thoughts?
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