BG-Map
Basemap Editing Tip
How to Break Out a Portion
of Your Basemap
Updated 5/22/02
This document describes how to
break out a portion of your basemap and place it into a separate file.
Sometimes, you may wish to break out just a small
section of your basemap to send to an architect or designer. Here’s how:
1. Turn Off
the GRID layer.
2. Draw a
closed polyline around the area that you wish to include.
3. At the command line, type TRIM <Enter>
4. AutoCAD
will prompt - "Select Cutting Edges Select
Objects" Click on the closed polyline, and hit <Enter>
5. AutoCAD
will prompt - "Select object to trim or
shift-select to extend or [Project/Edge/Undo]:" Going around the
closed polyline, one by one, click on each line that passes through the polyline,
causing it to be trimmed at the polyline boundary. If you make a mistake, type U <Enter>, and the last trim
will be undone. When finished, hit
<Enter>
6. At the Command prompt, type -WBLOCK <Enter>
7. Select a
filename to use for the drawing that you will be sending to the designer.
8. AutoCAD
will prompt: "Enter name of existing block or [=
(block=output file)/* (whole drawing)] <define new drawing>:"
Hit <Enter>
9. AutoCAD will prompt: "Specify insertion base
point:" Type 0,0 <Enter>
10. AutoCAD
will prompt: "Select
objects:" Select all of the objects inside the closed polyline, and
then hit "<Enter>". All
the objects will be written to the new file.
11. DO NOT SAVE THE BASEMAP! Instead, close BG-Map, and re-open it. You basemap should be restored to its original condition.