When you import a CAD file into a TPC drawing you are importing the drawing objects from the file. In a DXF or DWG file these are called Entities. In a DGN file they are called Elements. A polyline in the imported file becomes a polyline in your drawing. TPC reads the layers, blocks, entities, xrefs, attributes, etc from the drawing. Once inside your drawing, the object behaves as if you had created it in your drawing.
TPC makes every effort to preserve the layers, blocks (cells), raster images, line types, hatching and fonts that were used in the CAD file. You will find settings for specific formats like DWG that support block flipping, entity attributes and other CAD features. In the rare case that TPC encounters a line type, hatching or object that it does not understand, it can explode that object into its parts so that the object is still reproduced in TPC's drawings.
If you are interested in the coordinate positions of the imported objects, you may want to convert objects or layers to survey points.
Vector files like PGN and EMF are imported the same as raster files like JPG or GIF. In a TPC drawing, they are imported as a picture which can be georeferenced to the survey and used as a background photo or cropped and sized to use as a vicinity map or company logo.
There are lots of uses for pictures in a TPC drawing. See Pictures.
Individual formats have specific options like file version which TPC makes available through the Export dialog.
DXF Files
DWG Files
Shape Files
DGN Files
EMF (Enhanced Windows Meta) Files
PNG (Portable Network Graphics) Files
PDF Files
Raster Files (JPG, GIF, TIFF, BMP)
Drawings
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