[OSGeo Africa] Georeferencing or overlaying old aerial photograph with cadastre

Mike Shand Mike.Shand at glasgow.ac.uk
Wed Nov 16 03:18:03 PST 2016


Depending on the topography (relief variations over the area covered) 
and photoscale you will probably have to cope with both relief and 
radial displacements - assuming you are not using orthophotos.  Ideal 
situation for good georeferencing of standard aerial photos would be 
flat ground and a large photoscale.


On 16/11/2016 11:06, Aslam Parker wrote:
> Hi Jeff
> My colleague Muhammed Deal <Muhammed.Deal at drdlr.gov.za> has a tutorial 
> that he can send you, we do this all the time on QGIS.
> Please take note that if you do a georeferencing by common points, 
> this amounts to  rubbersheet/transformation and does not create an 
> orthorectified imagery and the georeferencing will be approximate.
> *From:*Africa [mailto:africa-bounces at lists.osgeo.org] *On Behalf Of 
> *Jeff Ngwane
> *Sent:* 16 November 2016 12:17 PM
> *To:* Africa local chapter discussions
> *Subject:* [OSGeo Africa] Georeferencing or overlaying old aerial 
> photograph with cadastre
> Hi,
> How to correctly georeference old aerial photograph (i.e 1972) for 
> purpose of being aligned with up to date cadastre on QGIS recent 
> versions? I have been trying but in vain. Please help me.
> Thank
> Jeff
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