Re: How to plot a survey plan using "Surveyor's Units" in LibreCAD
As I recall (it's been a while since I did this), but bearings are measured clockwise with 0 degrees at the 12 o'clock position while LibreCAD measures angles counter/anti-clockwise with 0 degrees at the 3 o'clock position. The conversion from bearings to degrees required a couple of steps. I once had a spreadsheet to do the conversion, but it seems to have disappeared into the ether. If I do find it, I'll post it here.
I once had a spreadsheet to do the conversion, but it seems to have disappeared into the ether. If I do find it, I'll post it here.
EDIT: Found it: SitePlanCalculations.ods
I found the .ods file Gary_S shared very helpful in getting on the right track with this issue, thanks Gary_S! So I wanted to share what I progressed in this converter spreadsheet. The original sheet is still included.
To use the worksheet:
1) Enter all the distances and bearings in the 'Survey Loop' table
2) Copy the 'Command' column from the adjacent 'LibreCAD' table
3) In LibreCAD, select the '2 Point Line' or enter 'line' in command box
4) Set the starting point, I typically use 0,0
5) In LibreCAD versions 2.2 and newer, click the menu button next to command box and select 'Paste Multiple Commands', this should enter everything from the worksheet
Here's one I prepared earlier. It probably doesn't add anything to what has already been posted but I'll post it anyway. The Mils to Librecad sheet converts bearings in mils to LibreCad angles - I wrote it to transfer bearings from a military compass to LibreCad. It has a handy DMS-decimal degrees conversion.
The other sheet converts theodolite angles and a distance to relative coords from a station.