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UCS group codes<br />
Group codes<br />
Description<br />
100 Subclass marker (AcDbUCSTableRecord)<br />
2 UCS name<br />
70 Standard flag values (bit-coded values):<br />
16 = If set, table entry is externally dependent on an xref<br />
32 = If this bit and bit 16 are both set, the externally dependent xref<br />
has been successfully resolved<br />
64 = If set, the table entry was referenced by at least one entity in the<br />
drawing the last time the drawing was edited. (This flag is for the<br />
benefit of AutoCAD commands. It can be ignored by most programs<br />
that read DXF files and need not be set by programs that write DXF<br />
files)<br />
10 Origin (in WCS)<br />
DXF: X value; APP: 3D point<br />
20, 30 DXF: Y and Z values of origin (in WCS)<br />
11 X-axis direction (in WCS)<br />
DXF: X value; APP: 3D vector<br />
21, 31 DXF: Y and Z values of X-axis direction (in WCS)<br />
12 Y-axis direction (in WCS)<br />
DXF: X value; APP: 3D vector<br />
22, 32 DXF: Y and Z values of Y-axis direction (in WCS)<br />
79 Always 0<br />
146 Elevation<br />
346 ID/handle of base UCS if this is an orthographic. This code is not<br />
present if the 79 code is 0. If this code is not present and 79 code is<br />
non-zero, then base UCS is assumed to be WORLD<br />
71 Orthographic type (optional; always appears in pairs with the 13, 23,<br />
33 codes):<br />
1 = Top; 2 = Bottom;<br />
3 = Front; 4 = Back;<br />
5 = Left; 6 = Right<br />
13 Origin for this orthographic type relative to this UCS.<br />
DXF: X value of origin point; APP: 3D point<br />
23, 33 DXF: Y and Z values of origin point<br />
48 | Chapter 4 TABLES Section
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