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1

The distortion is caused by your selection of target SRS, and the CRS you are using in your QGIS project. As soon as you are using a different CRS in QGIS as the one used to create your the raster (jpg file), you will see this distortion. This normal behaviour. If you're setting the same CRS to the QGIS project, the image shown will resemble your original ...


2

I assume two things causing your described error. Make sure you chose the right in- and output coordinate system. If the input image has a wrong coordinate system the output is adjusted according to these distorted information. Try to distribute your control points over the whole image. Additionally, if they are too close smaller inaccuracies have a larger ...


0

Check out http://mapwarper.net . Assuming they're all the same extent you can use its "align" tool to match your georeferencing points for multiple images


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Since the 1.10 version of GDAL/OGR, you can now "georeference" vectors layers (Add ability to transform vectors based on GCPs in ogr2ogr) with translations, rotations and shearing ogr2ogr -gcp 5 -135 0 0 \ -gcp 283 -135 1000 0 \ -gcp 5 278 0 1000 \ -gcp 283 278 1000 1000 \ -f "ESRI shapefile" gcppolyg2.shp gcppolyg.shp This feature ...


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In your case (jpg rasters and exact same extent for all rasters) the Warp From File tool is just fine. If you haven't saved a link file yet you should do this first: Georeference one raster in ArcMap, click the View Link Table button and save the links to a text file using the Save button: Then there are different options: Batch: You can use the Warp ...


0

If you consider an image as a grid of pixels with x,y coordinates, by georeferencing you are essentially telling the software that coordinate p in the image should really be at coordinate q in the GIS data CRS. This concept can also be applied to images under the term registration. Two images can be said to be co-registered if the x,y pixel coordinates ...


1

This problem may arise if the source file has paletted colours. During reprojection, QGIS tries to interpolate between original cell values, and this fails when you only have a bunch of paletted colours. So expand your raster file to RGB, which allws for contiguos interpolating. Raster -> Convert -> Translate has a dropdown box that you can change ...


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I have good result changing the default transformation settings from Linear to Helmert.


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Assuming you're creating an ArcMap Add-in: Dim pApp as IMXapplication = CType(My.ArcMap.Application, ESRI.ArcGIS.ArcMapUI.IMxApplication) Dim pDoc As IMxDocument = pApp.Document Dim pMap as IMap = pDoc.FocusMap ' document may contain many maps, this is the acive one' Dim pSR as ISpatialReference = pMap.SpatialReference This is the chain from ...


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Try taking a look at these places: http://help.arcgis.com/en/sdk/10.0/arcobjects_net/componenthelp/index.html#//00490000003t000000 http://forums.esri.com/Thread.asp?c=159&f=1707&t=232161 This is assuming you're meaning a spatial reference from a layer you put in as a basemap. If you are using an ArcGIS basemap from ESRI, the spatial reference is ...



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