Essentially if one image is flipped both left and right and up and down then I should get the other image. If the flight direction changes and the camera moves from north to south then the up direction of the vertically long image is south, down direction is north, right direction is west and left direction is east. For example if the flight direction is such that the camera moves from south to north then I might get a vertically long image with the up direction being the north, down direction being the south, right direction being east and left direction being west. I expect one image to be a180deg rotation of the other if the flight direction changes. I understand that the left and right of an image is not always the west and east of real direction and it depends on the depends on the flight direction of the satellite. Please let me know if you still have any questions about the LROC data set. That is why you will always need to look at the index table to find the corner coordinates of the LROC data to further interpret the images. It totally depends on the flight direction of the satellite and the cameras onboard the satellite. The reality is the left and right of an image is not always the west and east of real direction as you noticed, and north of image will not always be the straight up direction. If you fill those numbers for those 4 image corners, you will see the coordinates are correct and consistent with the LROC quickmap.ĭESCRIPTION = "The planetocentric latitude coordinate at the center ofĭESCRIPTION = "The planetocentric longitude coordinate at the center of And you can find corresponding index records from index.tab for the data product M1106080949LC. In index.lbl, you will find below definitions for the columns 70 to 79 for the lat &lon coordinates of the center point and 4 corner points of the image. Please refer to the index.tab and index.lbl in the below link. It is the way how to interpret the image and the index tables. There is nothing wrong with the data products you downloaded from ODE. I would to like to know if this is true and if yes then why is there a flip in the image product from Lunar Orbital Data Explorer.īoth the LROC *.img data and browse images in Lunar ODE are the original data provided by the LROC team. I am assuming that the above link is giving the right image and the image from the Lunar Orbital Data Explorer is flipped. However if you compare the above image with the LROC image in the below link then you will realize that the images do not match and there is a flip along the vertical line. Minimum Longitude : 334 and Max Longitude : 335. Minimum Lattitude : 29 and Max Lattitude : 30. If you filter the LROC-CDRNAC product by the below location then you will get the image with the product ID M1106080949LC. Consider an image downloaded from the Lunar Orbital Data Explorer ( ).
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