Fixed error in PLAN_LEVEL elevation value in printed svgs #2961

Also added more precision to inPerFoot in helper.format_distance to avoid this a bit annoying precision problem where format function keeps adding 1/256"

Without precision - https://i.imgur.com/D9WYjvJ.png
With precision - https://i.imgur.com/3XgOFSH.png

src/blenderbim/blenderbim/bim/module/drawing/helper.py

@@ -131,7 +131,7 @@ def format_distance(value, isArea=False, hide_units=True):
     unit_length = bpy.context.scene.unit_settings.length_unit
 
     toInches = 39.3700787401574887
-    inPerFoot = 11.999
+    inPerFoot = 11.9999
 
     if isArea:
         toInches = 1550

src/blenderbim/blenderbim/bim/module/drawing/svgwriter.py

@@ -794,7 +794,7 @@ class SvgWriter:
                 )
             )
             # TODO: allow metric to be configurable
-            rl = ((matrix_world @ points[0].co).xyz + obj.location).z
+            rl = (matrix_world @ points[0].co).z
             if bpy.context.scene.unit_settings.system == "IMPERIAL":
                 rl = helper.format_distance(rl)
             else: