Hello, I am running into a problem and I was hoping for some insight as to what is happening and how to fix it.
Before I begin, I am working with project data processed in Pix4d desktop, I completed this project a few months ago and the final product included traditional survey data along with UAS data from my M600P/Sony A7rii, all residing in AutoCad Civil3d 2019.
In this first photo you can see the XY values of a point in the Pix4d Survey model match the XY values of the same point in the traditional survey data. Confirming the coordinate systems and units are correct.
Upon importing the linework from Pix4d Survey into Civil3d 2019 I can see there is a meters conversion occurring. Initially I disregarded but when the linework was loaded It was clearly not in the correct location.
Location of DXF vs Traditional survey data.
After opening the DXF and searching for the $insunits section I discovered the DXF insertion units are being written in meters despite the civil3d .DWG, Pix4d desktop and Pix4d Survey data all showing the correct units, feet. How can I change the units when exporting? Manually editing the $insunits field to the correct value of <2> does not work and I did not see any settings for this in Pix4d Survey.
Finally, the last picture shows that the data from the DXF is being scaled by the conversion factor of 3.281. (the correct Z)(3.281)=4718.72’