[Talk-GB] Aerial Photography

Tristan Thomas tristan.thomas at wikinewsie.org
Mon Sep 14 11:00:52 BST 2009

Many of the photos taken above Stratford upon Avon seem to be taken at an
angle-how do people find them for mapping from?

2009/9/14 Chris Hill <osm at raggedred.net>

> 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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