Good Day,
I am situated in South Africa and just starting with photogrammetry and survey grade data.I use a Mavic 3 Enterprise with RTK and a Emlid Reach RS2 as a rover to mark out GCP’s. I am having trouble with my model being displayed upside down. When I start a new project I select the images for import and select in which CRS I am working in. After this step the project opens and evertything is upside down even before adding GCP’s. My CRS in South Africa is Hartebeeshoek94/Lo29 and my vertical is SA LLD height. Also after adding my GCP CSV file I end up with westing and southing Column Headings. Am I missing a step where I am supposed to convert my drone data or something else?
Thank You
Hi and welcome to our community forum!
The EPSG definition of Hartebeesthoek94 / Lo29 (EPSG:2053, Hartebeesthoek94 / Lo29) defines the first axis as Westing and the second axis as Southing. That means that if we paint a map on the usual XY axis convention where X is going right on the paper and Y is going up, then we will have west going right and south going up, in other words a 180 rotation.
We are not aware whether at the time this CRS was defined, the intention was to have South point up on drawings or not (because north is not always pointing up in all maps done in the world), so no correction is applied for displaying the data.
The display of the labels on the map is of course not how it should be. We apologize for that and will look into it.
If you have any insights on how surveyors and other people working with maps in South Africa and Namibia would like to have them displayed, please share them with us!
Kind regards,
Vincent