herkam Posted July 17, 2022 Share Posted July 17, 2022 (edited) Hi, I opened a geotiff and did a simple erase of an small area and then saved it with a new file name. I opened the original geotiff in the software "manifold viewer" and checked the position of a feature in the orthophoto. I opened the modified geotiff in the software "manifold viewer" and checked the position of the same feature in the orthophoto. When I compared the reported position in "manifold viewer" for the feature in both geotiff it was offset off by 8 meters in longitude and 6.5 meters in latitude after editing. I did another test where I cropped the picture and saved it. When I compared the reported position in "manifold viewer" for the feature in both geotiff it was offset off by 152 meters in longitude and 583 meters in latitude after editing. I have checked this data with GeoVisu also and it shows similar offsets of position. The geotiff is 15182x20186 pixels (300 MPixels), resolution in 10cm/pixel Cheers Hakan Edited July 17, 2022 by herkam Quote Link to comment Share on other sites More sharing options...
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