I'm using the Orfeo Toolbox Monteverdi in combination with QGIS in order to produce classified vectors of vegetation cover which I then use in maps in QGIS. (I can't use the QGIS OTB plugin because as far as I can tell it doesn't run on OS X - I'd be pleased to be corrected on that though).
Monteverdi 1.10 (edit - just updated to 1.12 and tried that, same result)
OS X 10.6.8
When I load the resulting shapefile into QGIS, it always appears displaced by about 75km to the north east of where it should be. As far as I can tell it's not a datum/projection issue as the CRS is the same for all layers.
My work flow is as follows:
- produce georeferenced raster image from scanned jpg in QGIS
- load raster in Monteverdi
- perform supervised classification using SVM Classification tool
- export resulting classified vectors as shapefiles
- open vectors in QGIS
The vectors then display at a location different to the original georeferenced image.
I'll post the files of interest if anyone would like to check them out to see if I'm doing something wrong.
http://bit.ly/NCXasm - original GeoTiff raster (270kb zipped)
http://bit.ly/TDFWiS - final vectors produced in OTB and then merged to a single shapefile in QGIS (119kb zipped)
Any assistance or advice would be much appreciated.