kdomain Posted March 23, 2015 Report Share Posted March 23, 2015 Hi all, please assist with orthorectification. Is it possible to orthorectify images without the rational polynomial coefficients (RPC). I have satellite images and they only have .aux , .rrd & .tiff files. Been trying to rectify with erdas but they are not getting rectified properly onto the reference image. Is there any technique i can use . Thank you. 1 Quote Link to comment Share on other sites More sharing options...
mamadouba Posted March 24, 2015 Report Share Posted March 24, 2015 Which sensor? Quote Link to comment Share on other sites More sharing options...
kdomain Posted March 24, 2015 Author Report Share Posted March 24, 2015 Geoeye Quote Link to comment Share on other sites More sharing options...
pasfans01 Posted March 24, 2015 Report Share Posted March 24, 2015 you must built your own RPC from GCP using ENVI, ERDAS, PCI Geomatica and few others image processing software, . Keep in mind that the accuracy of derived RPC heavily relied on your GCP number, accuracy and distribution. If you are using GeoEYE imagery at <0.5 meter resolution, basically you need GCPs derived from Geodetic GNSS survey (static/kinematic) which has accuracy <10 cm. 1 Quote Link to comment Share on other sites More sharing options...
ram3322 Posted March 24, 2015 Report Share Posted March 24, 2015 How to get RPC from GCP with ERDAS. Thanks Quote Link to comment Share on other sites More sharing options...
cos179 Posted March 24, 2015 Report Share Posted March 24, 2015 You need to select a model that doesn't need an rpc model however with this way you have to use more GCP's to resolve. Quote Link to comment Share on other sites More sharing options...
pasfans01 Posted March 25, 2015 Report Share Posted March 25, 2015 @cos179 I didnt know that we could do orthorectification without RPC in erdas, nice info btw, will check later @ram3322 : just check ERDAS help document, I saw the tutorial there, Quote Link to comment Share on other sites More sharing options...
ram3322 Posted March 25, 2015 Report Share Posted March 25, 2015 Thanks pasfan01. I will check the help Quote Link to comment Share on other sites More sharing options...
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