Topics

1

General / Ground control points for aerial survey

« on: May 06, 2014, 12:31:32 PM »

Hi,

I like to do an aerial survey from about 100 to 200 m altitude and I am looking for a solution for the ground control points.

Ideally the points should have the following requirements:
- good visibility
- easy to transport
- light weight
- fixed to the ground (no flying away by wind)
- low cost
- if possible: decomposable, so I do not have to pick the points up after the survey 

Until now I used paper plates, but they are hard to fix to the ground and are prone to rain and hungry sheep.
Any recommendations?

2

General / DEM (Geotiff) - coordinate systems (solved)

« on: April 24, 2014, 07:40:44 PM »

Hello,

I would like to visualize exported elevation models from photoscan within a software (http://iaps.zrc-sazu.si/en/svf#v RVT standalone version 1.0). However, it does not work because the geotiffs generated by Photoscan seem to have a strange coordinate system. It does not matter if I use local coordinates or a projected coordinate system, the RVT toolbox says that the input DEM is given in geographic coordinates. I already mailed with the developers of the toolbox and they told me to check photoscan for the units of the exported DEM.
Any help is appreciated.

Ronald

Edit: Problem solved, my model had too high resolution for the software used.