Reducing PDF file Size

[Tom W.]

16 hours ago, Hans-Olav said:

Not sure if it does something with vector only graphics. 

 

I have an A1 size sheet with six vector-only viewports on it. The sheet DPI is 72 + if I publish it with the resolution set to 72 DPI with file size reduction set to 'None' the resultant PDF is 13.9 MB.

 

If I publish it again + set the file size reduction to maximum the resultant PDF is still 13.9 MB so no benefit there.

 

If I set the export resolution to 48 DPI however the PDF comes in at 3.6 MB but the hatches have gone a bit haywire in the process.

 

I checked the fill on the VPs + half of them were set to None so I made sure all of them had a solid fill + republished at 72 DPI but the PDF was still 13.9 MB so again no benefit there either.

 

12 hours ago, zoomer said:

I thought these were already typical CAD problems with available

hardware in the 80ies and 90ies, so already highly optimized.

Therefore would not have expected 2D problems with current

way more capable GPU hardware and graphic APIs .....

 

I thought I read somewhere that the emphasis on maximising 3D optimisation meant that 2D performance had suffered as a result but I know nothing about these things... I know I receive PDFs from others containing vast amounts of vector based geometry (maps for example) + there are no issues with the file size or anything else but when I try to create the same type of PDF in VW the files are enormous... So is it to do with how VW deals with 2D geometry compared to other software?

 

[zoomer]

4 hours ago, Tom W. said:

So is it to do with how VW deals with 2D geometry compared to other software?

 

I think it is how VW exports the PDF (?)

 

 

But do you also have performance problems with complex lines

and hatches inside VW in DL or SLVPs ?

I had in the past with SLVPs.

 

Or I had lags in drawing view with PDF underlays.

I converted them to TIFF and it was fast again.

And if I insert PDFs, I deactivate snapping, not very accurate anyway.

[Tom W.]

3 hours ago, zoomer said:

But do you also have performance problems with complex lines

and hatches inside VW in DL or SLVPs ?

 

Yes I have a ProMap template file covering the 8km x 9km area I mainly work in. It is a 2D file: just lots of lines/polygons (no hatches) + only 13MB in size. But it is quite laggy on the DL zooming in + out + navigating about.

 

Plus in other files hatches like this will really slow things down:

 

But this one has 379 levels so I guess I've only got myself to blame...

 

Other times I've placed too many Plant symbols (with too much 2D linework) in a drawing + things have ground to a halt...

 

On the other hand I can cram as much 3D geometry in as I like + everything's absolutely fine!

[zoomer]

Hmmh ... maybe it is @Dave Donley to tweak VGM a little ?