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| GeoCommunity Mailing List |
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| Subject: | [gislist] assessing coastal buiding change |
| Date: |
01/11/2006 03:45:02 AM |
| From: |
O'Donnell, Vicki |
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Hello all,
I have a query re assessing coastal 'building' change using aerial imagery.
We are trying to assess a building boom along the coast in Ireland (to
5-10km inland) over the last 20-30 years. The area is covered by aerial
photos taken over a series of years, this would be perfect but the coast
would run to hundreds of thousands to purchase licences for the imagery so
its not an option. Neither really are historic maps as buildings are not
inserted in 1900s rasters in the same shape/colour so an algorithm will not
pick up the old buildings (and mapping from our historic rasters will not be
of much use)
What we need perhaps is highest resolution satellite imagery to id
buildings. We would need one coverage from as far back as possible (the 80s
if possible) and one more recent set of images. Even if clusters of building
could be identified that would help.
Has anyone carried out this type of work before? Has anyone got a
suggestion? Data types are obviosuly different in Ireland (scales, time
series, cost etc..) and we have looked at using the data here but don't
think its feasible, thus we are hoping satellites could help.
Thanks in advance,
Vicki
http://cmrc.ucc.ie
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