AutoCAD 2012 DXF Reference February 2011 © 2011 Autodesk, Inc. All Rights Reserved. Except as otherwise permitted by Autodesk, Inc., this publication, or parts thereof, may not be reproduced in any...... 175 LAYER_FILTER . . . . . . . . . . . . . ... . . . . . . . 202 SPATIAL_FILTER . . . . . . . . . . . . . ...