When I convert a scanned PDF to DWF the file size balloons as much as 5 times. Whether I print to DWF using the DWF writer for 2D printer driver or open the PDF in Design Review 2013 and save as DWF or DWFx makes no difference.
Is there a better way or are we stuck with multimegabyte files when I could stick with PDF and keep it under 1Mb per file?
There is no relationshhip between those file types: it's content and your output (and perhaps even the lackluster driver being used to create the other format) that controls files sizes.
Scanned PDFs are a huge collection of points (your drawing plus "noise". DWF triesd to create Vector files, so each point is actually a point, taking up code space in the file definition. A billion points bulk up file size more than one continous line of the same length.
PDF= standard paint brush.
DWF= super fine pointed pen.
My understanding of the DWF format is that it is based on the ISO 29500 Open Document format which is basically a ZIP file collection of objects which can include graphics such as PNG, BMP, etc. Seems to me a PDF to DWF conversion would be mostly just a repackaging, not something requiring a 5:1 size expansion, Are you saying it is really trying to convert raster data to vector? Are the PDF graphics being converted to a graphics memory hog format like BMP instead of something more efficient like PNG? If so then I'll just stick with PDF. I had hoped I could use DWF to leverage the built in markup capabilities of Vault and Design Review without having to switch to Acrobat during change order reviews.