If you are OK with combining all of the individual PDF's, it is a simple process and you can save them all in mass. Select all and then right click, combine. This works with the full version of Acrobat. LZW is a lossless compression, and its possible, based on the default settings, that when you save in Adobe, it is changing to a lossy compression (JPEG) which is providing the savings, at least on the background. Adobe also can provide different compression for selected map elements. Perhaps you can try with a different lossy compression algorithm within ArcMap?
-----Original Message-----
From: Northeast Arc Users Group [mailto:[log in to unmask]] On Behalf Of Robert Pruyne
Sent: Friday, October 02, 2015 9:33 AM
To: [log in to unmask]
Subject: Map to PDF compression
Hi Everyone, Happy Friday,
I have just finished up a large project that has around 200 maps. Most maps are E-Sized, and they are 'complex'. I say complex in that they have many datasets, both raster and vector, fills, transparencies, complex polygons, millions (billions?) of nodes. These maps are beastly (but beautiful?).
Part of our deliverable is PDFs and the distribution of the PDFs digitally. Right now this set comes in about 5GB in size. These PDFs were exports from ArcGIS Export command (using 350dpi, 1:3 resampling, RGB Colorspace, Compressed Vector Graphics, LZW Image compression). The maps range from about 35MB to 100MB. If I take these PDFs into Fully licensed Adobe Acrobat and just resave them, it seems I can gain another 30-40% reduction in file size, but doing this individually is less than appealing, I may be able to batch them through this.
My question to the group is, are there any hints or tips on reducing file size when exporting to PDF from ArcGIS without losing TOO much quality in final output? Or have I maxed out my compression v. quality already? Am I doing something wrong, or right?
Thanks in advance!
-Rob
---------------------------
Robert C Pruyne Jr, GISP
GIS Specialist
Rockingham Planning Commission
156 Water St, Exeter, NH 03833
p 603.778.0885
f 603.778.9183
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