Extracting coordinates from CTX observations |
Extracting coordinates from CTX observations |
Apr 22 2016, 07:54 PM
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#1
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Member Group: Members Posts: 423 Joined: 13-November 14 From: Norway Member No.: 7310 |
I've been searching a bit, but I haven't found anything: is there a quick method to get the geographic coordinates of any given point within a CTX observation?
I note that the right-click option "Copy Coordinates" in HiView gives the geographic coordinates for HiRISE images when drag-and-drop is used (as opposed to JPEG2000 downloads, when it just gives the pixel coordinates). Is there a way to use the drag-and-drop method for CTX imagery as well, perhaps? The reason I am asking is that some HiWish targets are a bit tricky to place with visual guidance only. -------------------- |
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Apr 22 2016, 08:47 PM
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#2
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Member Group: Members Posts: 890 Joined: 18-November 08 Member No.: 4489 |
ingest the CTX pds image into ISIS3 , then run spiceint on the image
then view in Qview or in QGis ( ArcGis can too but it is VERY EXPENSIVE ) every pixel will be Geo-referanced example: http://viewer.mars.asu.edu/planetview/inst...01S078W&T=2 the pds img ( 197.5 MiB) http://pds-imaging.jpl.nasa.gov/data/mro/m..._XN_01S078W.IMG and the HiRISE in the ctx image http://www.uahirise.org/ESP_038602_1770 the parts http://hirise-pds.lpl.arizona.edu/PDS/EDR/...SP_038602_1770/ ( needs a 10 to 15 gig of drive space for the working directory to assemble and calibrate the 18 RED parts - hirise images are BIG ) mroctx2isis CODE mroctx2isis from=P18_008234_1782_XN_01S078W.IMG to=P18_008234_1782_XN_01S078W.cub spiceinit from=P18_008234_1782_XN_01S078W.cub ctxcal from=P18_008234_1782_XN_01S078W.cub to=P18_008234_1782_XN_01S078W.Cal.cub now there is a georeferenced image ( unmapped ) this one is near enough to the Equator the default "sinusoidal" will do ( both the CTX and the HiRISE image MUST!!! use the same map file ) CODE cam2map from=P18_008234_1782_XN_01S078W.Cal.cub to=P18_008234_1782_XN_01S078W.Cal.Map.cub once the CTX and hirise are mapped to the same map file you can then use "mapmos" to insert it into the ctx or make a control network and use that a 1/10 reduced size CTX image of the above example ( the hirise in the above will take a bit of time ( a few hours) even with my Automated script ) |
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Apr 23 2016, 08:56 AM
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#3
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Member Group: Members Posts: 423 Joined: 13-November 14 From: Norway Member No.: 7310 |
Thanks. If there is no other way, I guess I'll look into it. (the UNIX requirement of ISIS 3 is inconvenient)
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