Recognition of the Layer Structure

• Assign the PDF Layer Structure to DWG or DXF (if Available)
  

When creating a PDF file, a PDF layer structure can be assigned. Unfortunately, this feature is rarely used. The layer structure in PDF has a tree-like structure. In contrast, the layer structure in DWG or DXF is flat. Print2CAD offers the possibility to convert the tree-like structure from PDF to the flat layer structure of DWG or DXF.

• Sort Elements on a Separate Layer According to Entity Color
  

Print2CAD offers the possibility to create a layer structure based on the colors of PDF elements. If the recognition function is activated, all elements will be sorted by color into separate layers. The layers receive the name: Color-[Number] or Color-[RGB]. Under certain circumstances this function may create too many layers so we recommend to change the colors to 10 index colors. This feature can be combined with the option “Sort Elements onto Separate Layers According To Entity Line Weight.”

• Sort Elements on Separate Layers According to Entity Line Weight
  

Print2CAD offers the possibility to create a layer structure based on the line weight of PDF elements. If the recognition function is activated, all elements will be sorted by line weight into separate layers. The layers receive the name: Width-[Number]. This feature can be combined with the option Sort Elements onto Separate Layers According to Entity Color.

Important:
Line width is only available in DWG or DXF file version 2004 and higher. Therefore if necessary, change the target version to 2004 or higher.

Purge Short Distance Polyline Vertexes and Generate Polyline (Data Reduction)

• Some PDF files contain paths with many small distances between vertexes. It produces a lot of coordinate information and it increases the drawing data amount.
  

• You can reduce the number of vertexes in paths if you delete all vertexes with smaller distance to its neighbor than the given distance. Because the deleting of vertexes can phase the corners, the parameter Max. Angle Alternation helps the program to recognize the corners.
  

• PDF files can contain paths with many points (vertexes). Even a large amount of path data can easily be processed in PDF, because paths do not have many Settings and properties. After the conversion in DWG or DXF, every path segment becomes a full CAD line or polyline. These single CAD elements may include many additional Settings and properties.
  

Delete Short Lines (Data Reduction)

• Some PDF files contain paths with many small lines. This happens mostly when dotted lines have been generated in PDF files as single lines. These single lines can easily be converted to PDF as the paths do not have many Settings or properties.

• After the conversion in DWG or DXF, every line will be a full CAD line and may feature many additional Settings and properties. This data may strain the capacities of a CAD system and RAM.

• The minimum allowed line length can be set with the parameter “Smallest Line”. If a line is smaller than the parameter “Smallest Line” then the line gets deleted.

Important:
Dotted lines or hatches may be deleted completely, and therefore may not be available in the created DWG or DXF file.

Generate Circles and Arcs

• Many PDF files contain circles and arcs that have been converted into polylines. These polylines tend to be imprecise making it difficult to detect them as a circle or arc.

• Although the recognition of a polyline as a circle or arc appears to be easy when one looks at a PDF (a person can immediately recognize the circle or arc), the software has to work a little harder to do this.

Assign RGB color space

• Print2CAD allows the user to assign RGB colors to all converted elements. An RGB color space is any additive color space based on the RGB color model. A particular RGB color space is defined by the three chromatic colors red, green, and blue additive primaries.