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Plot Raster Images
Tip# 3555 By Hayden Clarke On 03-Jan-2011
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Rated By 1 users
Categories : Plot/Print
Software type : AutoCAD 2011
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Adjust the RasterPercent and RasterThreshold settings for printing large images.

Hayden Clarke sends us a tip about some of the system variables in AutoCAD that influence the way it handles the plotting of raster images.

"This is a tip for printing drawings with high-resolution images or multiple aerial photographs. We have found a couple of settings (which apparently were added in the 2007 version) that affect how AutoCAD handles memory when dealing with raster images:

  • RasterPercent: 'Sets the maximum percentage of available virtual memory that is allowed for plotting a raster image.' The default is 20% — consider increasing this to 90%.
  • RasterThreshold: 'Specifies a raster threshold in megabytes. If the plotted raster image exceeds this threshold, the availability of system memory is checked. The plot is aborted if the image is too big for the available memory.' The default is 20 MB — consider increasing this to 100 MB.

"Changing these settings made a considerable difference when we plotted a current job with numerous aerials attached."

Notes from Cadalyst Tip Patrol:
Printing large images can strain your workstation and plotters. These settings will help your workstation by giving it more room to work with. RasterPercent sets the maximum percentage of virtual memory that is allowed for plotting a raster image; RasterThreshold specifies a raster threshold in megabytes. If the plotted raster image exceeds this threshold, the availability of system memory is checked. The plot is aborted if the image is too big for the available memory.

 

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