[OSM-talk] Using GeoBase images for openlayers for OpenStreetMap and OpenAerialMap

Jukka Rahkonen jukka.rahkonen at mmmtike.fi
Mon Dec 22 14:21:25 GMT 2008

andrew heggie <list <at> sylva.icuklive.co.uk> writes:

> On Friday 19 December 2008 23:11:47 Sam Vekemans wrote:
> > I would suggest that what the project really needs is a way to upload
> >   data to be processed by the OpenAerialMap server itself, rather than
> >   depending on users to upload 'appropriate' data. This means developing
> >   a processing queue to convert data from any available format to one
> >   more suitable for use in OAM. The discussion of what is 'appopriate'
> >   for OAM requires further discussion as well.
> I thought I was clever enough to upload 17 aerial photos of my home town to 
> which I have paid for free use (copyright retained by the aerial photography 
> firm) but when it came to complications of georectification I stalled. So I 
> agree a bit more help would be useful except how many people have use of such 
> photos? Mine are 4MB jpegs and with overlap they cover about 5km by 5km.

If you can acquire ground control points in some way I believe I could guide you
a bit further.  What you should do first is to find a few points from each image
and measure the image coordinates (row and column of a pixel) and real world
coordinates for that same pixel in some known projection.

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