ERDAS – RADARSAT AutoSync Georeferencing Wizard
AutoSync Georeferencing Wizard
Images that have not been assigned positional information need to be georeferenced. There are multiple ways to do this in ERDAS including using the georeferencing wizard. This method may not always work and does require that you have accurate imagery to georeference your image to.
Open the image file that you would like to geocorrect.
Open the georeferencing wizard.
Choose an Input (single or multiple)
Choose a Reference Image
Select the input band to use and the layer to use in the reference layer. You want to pick something that will provide very good contrast in both images. In this case it is a RADARSAT image being referenced to a landsat image. The RADARSAT image has well defined lakes so the NIR band was used in the landsat image for georeferencing.
Choose how many georeferenced points you want.
Choose the geometric model to use for the georeferencing.
For help choosing a model, refer to
http://www.microimages.com/documentation/TechGuides/77GeorefModel.pdf
Choose an output filename and location.
Too check how well your images georeferenced, load the reference image and the georeferenced image into the same view and open the swipe tool.
If the georeferencing isn’t as good as required, you can add in additional control points and reduce your RMS using check points.
This may not be necessary as the mosaicking process used to combine the images into one larger image often reduces georeference errors.
To learn about mosaicking refer to the mosaicking tutorial.
Much of the information and workflow demonstrated in this tutorial was learned from the Centre of Geomatic Sciences Remote Sensing Course work taught by Rob Hodder and Jim Norton, 2014-2015.
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May 28, 2016 @ 5:51 am
How to use batch command in this wizard to georeference multiple inputs along with their respective reference file ?