tag:blogger.com,1999:blog-1840643319439081135.post4781337690478864081..comments2024-03-27T19:52:13.864-07:00Comments on Frank's Geo-Geeking: Exploring RPCsFrank Warmerdamhttp://www.blogger.com/profile/15895312419251134409noreply@blogger.comBlogger9125tag:blogger.com,1999:blog-1840643319439081135.post-1758246846010908232021-02-24T07:03:38.886-08:002021-02-24T07:03:38.886-08:00Hello is your code available and we can try it to ...Hello is your code available and we can try it to generate RPC ?Anonymoushttps://www.blogger.com/profile/14679956899702624857noreply@blogger.comtag:blogger.com,1999:blog-1840643319439081135.post-309812817016053732017-04-14T11:34:52.656-07:002017-04-14T11:34:52.656-07:00Thank you so much Thank you so much Anonymoushttps://www.blogger.com/profile/14793350207220625488noreply@blogger.comtag:blogger.com,1999:blog-1840643319439081135.post-67868194744865202932017-04-11T17:59:10.299-07:002017-04-11T17:59:10.299-07:00You can also a penalty weight for the higher order...You can also a penalty weight for the higher order terms to keep them small, then finding the best-fitting coefficients minimizing your RPC to real camera reprojection. Of course, the question is now how to best pick the value of that weight, but a single value probably can work quite well in a wide variety of cases. <br />Oleghttps://www.blogger.com/profile/03190597887653662983noreply@blogger.comtag:blogger.com,1999:blog-1840643319439081135.post-57420920307719856382017-04-11T17:54:19.701-07:002017-04-11T17:54:19.701-07:00I guess the problem is implementing what you say i...I guess the problem is implementing what you say into a good tool, and thoroughly verifying that the tool does work with very small error for a good variety of cameras/terrains. Oleghttps://www.blogger.com/profile/03190597887653662983noreply@blogger.comtag:blogger.com,1999:blog-1840643319439081135.post-1724461340316065862016-04-17T07:29:14.365-07:002016-04-17T07:29:14.365-07:00Dear frank,
I have a problem in M.Sc. thesis which...Dear frank,<br />I have a problem in M.Sc. thesis which talk about Accuracy Assessment and Enhancement of Rational Polynomial Coefficients of Satellite Imagery.<br /><br />Data used are a stereo-pair of high resolution satellite imagery, provided with related RPCs and sets of ground control points affixed.<br /><br />By least-squares adjustment involving the provided RPCs and coordinates of Anonymoushttps://www.blogger.com/profile/14793350207220625488noreply@blogger.comtag:blogger.com,1999:blog-1840643319439081135.post-17853686363858012752014-09-28T19:19:33.644-07:002014-09-28T19:19:33.644-07:00How to use gdalwarp to orthorectify SPOT-6 (Rsenso...How to use gdalwarp to orthorectify SPOT-6 (Rsensor) image with RPC.? have you ever tried to orthorectify SPOT-6 with RPC using gdalwarp.?<br />i've tried but it was failed. there is warning like this "ERROR 1: Unable to compute a RPC based transformation between pixel/line and georeferenced coordinates".<br /><br />i use gdalwarp like this => gdalwarp D:\SPOT6_gdal\shinobi.ngapaxhttps://www.blogger.com/profile/00138590500609177664noreply@blogger.comtag:blogger.com,1999:blog-1840643319439081135.post-29730832881456519872014-05-23T10:20:43.868-07:002014-05-23T10:20:43.868-07:00Giovanni, Yes, in fact I went to producing 3 laye...Giovanni, Yes, in fact I went to producing 3 layers of GCPs and then things worked quite well. I have been meaning to do a followup post. Frank Warmerdamhttps://www.blogger.com/profile/15895312419251134409noreply@blogger.comtag:blogger.com,1999:blog-1840643319439081135.post-72721884682743062202014-05-23T06:59:44.300-07:002014-05-23T06:59:44.300-07:00Hi Frank,
thanks for this (old) post.
Did you go o...Hi Frank,<br />thanks for this (old) post.<br />Did you go on on this? I didn't read this post until today and I wondered if you came up to produce good RCPs from GCPs. G. Allegrihttps://www.blogger.com/profile/05591797281586790546noreply@blogger.comtag:blogger.com,1999:blog-1840643319439081135.post-31145698879109732962013-10-04T07:53:47.121-07:002013-10-04T07:53:47.121-07:00Frank, generating RPCs is somewhat of a black art....Frank, generating RPCs is somewhat of a black art. Commercial satellite vendors generate their RPCs by using the physical sensor model (orbital location and attitude, focal length, etc) to generate an imaginary 3D grid of "perfect" points to which the RPCs are fit. Using control points to determine RPCs definitely requires elevation variation, which is hard to come by in Indiana! I don&Anonymousnoreply@blogger.com