Yes, that's exactly the use case for Kite/Balloon photography. See https://sites.google.com/site/mtobiasresearch/diy-remote-sensing-1
We recently tried the OpenDroneMap on some of our photos: http://smathermather.wordpress.com/2014/09/16/opendronemap-art-and-science/ Thanks, Alex On 09/18/2014 11:56 AM, Michael.Dodd wrote: > Sounds very interesting. > I am trying to map the ridge and furrow so that I can see how plants are > distributed on them. I have been recording the plants with the high accuracy > gps so have these locations to cm level accuracy but not been able to put > them on a model of the R&F itself. If the photography is high enough > resolution and taken from low enough the individual plants themselves might > show up. > ________________________________________ > From: Alex Mandel [tech_...@wildintellect.com] > Sent: Thursday, September 18, 2014 7:21 PM > To: Michael.Dodd; Andrew Harfoot; qgis-user@lists.osgeo.org > Subject: Re: [Qgis-user] Interpolation > > All the rage at http://2014.FOSS4g.org - Structure From Motion. > Basically using airphotos to build a 3d mesh model of an area with > classic photogrammetry calculations automated. Photos need not be from > directly overhead. > > Specifically see the talks by Stephen Mather and Aaron Racicot. > > The open source option are not quite 100% there yet (Stephen's talk on > OpenDroneMap) but there is a $170 program PhotoScan that's an option > (See Aaron's talk). > > Thanks, > Alex > > PS: I use cheap cameras on Kites for sub-centimeter photography. > > On 09/18/2014 10:58 AM, Michael.Dodd wrote: >> Yes had thought about this and nearly got Leica to test out their latest >> laser scanner a couple of years ago but land owner was frightened it might >> cause some kind of damage to the area so it never happened. >> >> >> ________________________________ >> From: Andrew Harfoot [a...@geodata.soton.ac.uk] >> Sent: Thursday, September 18, 2014 2:46 PM >> To: qgis-user@lists.osgeo.org >> Subject: Re: [Qgis-user] Interpolation >> >> Hi Michael, >> >> Off the top of my head, but have you looked into a laser scanner mounted on >> some sort of aerial platform such as a cherry picker? Not sure whether the >> platform would be stable enough. >> >> Alternatively a low level UAV flight may provide a detailed enough DTM >> through stereo imagery analysis. >> >> Cheers, >> >> Andy >> >> On 18/09/2014 10:43, Michael.Dodd wrote: >> Any suggestions as to the best way to survey and interpolate ridge and >> furrow grassland that is not on a flat plane? >> I have tried various methods without success. >> >> The ridge and furrow area that I want to map is about 120mx120m, the ridge >> and furrow pattern is distinct with about 0.5m or difference between ridge >> ht and furrow base but the pattern has a slight curve towards one end and >> the land is not flat. If you are not sure what ridge and furrow looks like >> then there is an example at 51.9827, -0.9135, the stripes are clearly >> visible on the google earth image. >> >> Mapping can be done with cm level dgps but does this require many tens of >> thousands of points to be recorded. Or can fewer points be recorded and qgis >> interpolation somehow be told to interpolate along the ridge and furrow then >> fill in the area between them with some sort of curve. The actual curve is >> also problematic as the ridge top tends to be flattened and not a smooth >> sine wave. I don't have good LIDAR of the area but even that resolution may >> not be good enough. >> >> -- The Open University is incorporated by Royal Charter (RC 000391), an >> exempt charity in England & Wales and a charity registered in Scotland (SC >> 038302). The Open University is authorised and regulated by the Financial >> Conduct Authority. >> >> >> _______________________________________________ >> Qgis-user mailing list >> Qgis-user@lists.osgeo.org<mailto:Qgis-user@lists.osgeo.org> >> http://lists.osgeo.org/mailman/listinfo/qgis-user >> >> >> >> -- >> Andy Harfoot >> >> GeoData Institute >> University of Southampton >> Southampton >> SO17 1BJ >> >> Tel: +44 (0)23 8059 2719 >> Fax: +44 (0)23 8059 2849 >> >> www.geodata.soton.ac.uk<http://www.geodata.soton.ac.uk> >> >> >> >> >> _______________________________________________ >> Qgis-user mailing list >> Qgis-user@lists.osgeo.org >> http://lists.osgeo.org/mailman/listinfo/qgis-user >> > > _______________________________________________ > Qgis-user mailing list > Qgis-user@lists.osgeo.org > http://lists.osgeo.org/mailman/listinfo/qgis-user > -- Alex Mandel http://wildintellect.com _______________________________________________ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
