I am building a cadastral fabric and it's really nice to have the bearing and distance come up on the lines as I traverse around. I just found a great way to do this with the Add Geometry ArcGIS tool. It works most excellent:
But the issue I am having here is that the field does not auto-populate. I have rerun the Add Geometry tool everytime. Is there anyway to automate calculation? Its a pain to have to traverse a line and then run the tool.
Using the answer of @FelixIP, I was able to get it going, just add this into the label expression, set the parser to python and customise your attributes:
arcpy.AddGeometryAttributes_management(Input_Features="Cadastral Reference Lines", Geometry_Properties="LENGTH;LINE_BEARING", Length_Unit="FEET_US", Area_Unit="SQUARE_METERS", Coordinate_System="PROJCS['NAD_1983_UTM_Zone_17N',GEOGCS['GCS_North_American_1983',DATUM['D_North_American_1983',SPHEROID['GRS_1980',6378137.0,298.257222101]],PRIMEM['Greenwich',0.0],UNIT['Degree',0.0174532925199433]],PROJECTION['Transverse_Mercator'],PARAMETER['False_Easting',500000.0],PARAMETER['False_Northing',0.0],PARAMETER['Central_Meridian',-81.0],PARAMETER['Scale_Factor',0.9996],PARAMETER['Latitude_Of_Origin',0.0],UNIT['Meter',1.0]]") def FindLabel ([BEARING], [LENGTH]): return [BEARING] + " - " + [LENGTH] + "ft"