Hi there,
I understand this might the wrong forum for it, but surely Rhino is used by some GIS people. I have a question regarding coordinate systems of mapped data of the Earth.
Data stream 1: I have Lidar scans in UTM32 zone, imported in Rhino, the box of the point cloud seems rotated about 5.3 degrees to Rhino WCS. So about 5.3 degrees rotated to data stream 3.
Data stream 2: Land survey coordinates, supposedly working with a XY coordinate system aligned with North (which North I don’t know, but presumably grid North). This is a plot of land for building purposes.
Data stream 3: webviewer showing mapped data in UTM32 (norgeskart.no). A capture of the raster area of interest seems rotated about 3.7 degrees to data stream 2. This can show raster superimposed data over processed lidar cloud. However upon exporting this data, the cloud has the 5.3ish degree rotation and not the on-screen orientation of the raster cache.
Calculating grid convergence on stream 1 anchor, based on the UTM32 location gives a grid angle lower than 1 degree. So which of all these data streams is actually the meridian orientation ? I don’t care about magnetic North. I’m interested in a precision sun study, well, a 5 degree error seems not that bad, but at this point I’m curious why these data streams are not in agreement. I’m not a GIS expert, just trying to understand these coordinate systems.
Thanks in advance.