Under my account you will see a mission entitled “Crown Lane”. It was uploaded to the cloud on Friday evening and completed processing late on Saturday night. Whereas it did seem to take an eternity to process (over 24 hours), I’m also having a large problem with it.
Being on Business obviously provides the ability to view and export at a much higher resolution as well as upload a greater number of images, but the biggest draw of the Business account is the ability to export contours from the Elevation Toolbox. The results of this mission however are not giving me confidence they’ve been calculated correctly. Same goes for the standard elevation colours. Ground Control Points were not inserted as the data didn’t have to be relative to the outside world, just be in proportion with itself.
You will see from the aerial image that a large car park deck (painted green, grey and red) has been photographed along with a building running left to right to the south of the car park. Both the car park and the flat roof of the building are perfectly flat / horizontal.
You will see however that both the car park and the flat roof is shown in Drone Deploy to have a significant fall on it, which is clearly incorrect. In measuring across the flat car park deck, DD has calculated it to have a 2m fall across it.
And the length of the flat roofed building is shown to have a 3.5-4m fall on it
Neither of these roofs are sloped as the contours suggest and none of the surrounding ground has a fall on it either. The site is flat.
Both the roofs and the ground are flat. We do have a measured topographical survey to compare with and the DD calculations are undoubtedly wrong. Please can you advise what has caused DD to incorrectly assume the world is falling to the left?
One other thing, when measuring the width of the car park deck, it actually measures 32m in real ife and the on-screen measuring tool more or less confirms this at 31.76m. Close enough and am very impressed by this accuracy. When exporting to AutoCAD dxf file, I can’t understand why I am unable to measure accurately from the model. The width of the deck is measuring 52m or so. These are the export selections I am making.
All I need is a 2d AutoCAD file to scale and with the correct contours on it.
Many thanks in advance.