CAD @ Map3D ObjectData attribute is format-specific properties, it is also connected to passage CAD and GIS. CAD through to the mid-point, line, surface Add ObjectData property can by CAD @ Map3D own conversion tool to convert .dwg files into .shp file, which imported into ArcGIS in operation, it is a geographic information industry communication and CAD GIS bridge.
However, in reality, Map version ObjectData property may disappear. There are multiple versions of CAD on every PC, there are regular edition, there Map version, in particular, is often used to measure the industry and the South Cass7.0 9.0 tools, which led to the Map edition we'll CAD and CAD Edition operation between turns with a dwg file, ObjectData after operate with the regular version of CAD and saved, and then open the Map version will find that the original ObjectData property will disappear.
According to the use of this unit, we summarize the situation ObjectData after using cad Edition operating disappear, we have assumed that the property OD dwg file name ContainODFile.dwg.
1) In the normal version of CAD files by Insert command to insert ContainODFile.dwg, whether or not Explode check box is selected, and then CAD @ Map3D open after save, OD property on the entity disappeared;
The following situations will not be lost ObjectData:
1) with the regular version of CAD directly open ContainODFile.dwg, then add or remove an entity that does not contain OD attributes, such as adding a topographic map, frame and other finishing operations, then save and then open CAD @ Map3D will find, ObjectData still exists.
Test found that, in general open ContainODFile.dwg CAD version, and then create a new version of the CAD dwg file in general, copy the entity with OD attributes, will pop up "can not be copied to the clipboard" prompt. The reason that prompted the online search, there is reason entity where the layer is locked, there is corrupted file, you need to "recover" operation, but the data than to ObjectData, we give another reason may be the entity that contains the original file ObjectData property, which in turn is the ordinary version of the CAD can not see, and perhaps not used the attribute of the user can not understand.
If the user needs to perform the copy function, here are two options:
1) perform the copy function in CAD @ Map3D version;
2) In the ordinary CAD Edition, through the Insert command, so that the entity ContainODFile.dwg OD loss property, and then use the paste command to copy.