Tip # 99 : Understanding ‘?’ line elevations

By Sudam Fernando posted 02-26-2020 10:05


As many of us have worked with various types of lines and points in TBC, we may have run into a situation where we wonder if we set the elevation to ‘0’ or leave it as ‘?’. This short tip will explain the difference in using ‘?’ for elevations and ‘0’ 


The ‘?’  defines an undefined elevation. Hence, when we are creating a linestring ,polyline or point that requires no elevation, we can simply type ‘?’ and our line will have an undefined elevation (which is not the same as 0)  


However, if we edit the elevation of an already elevated polyline to undefined, the elevation will become 0. 




Hope this tip comes in handy, the next time you are using Trimble Business Center !