is it possible to draw layers at different resolutions in PDF?

JoeMcCollum — Wed, 15 Apr 2015 14:52:15 GMT

I think it is not but my boss doesn't believe me.

Here's some standard code for making a PDF:

Public Function createPDF()

Dim pActiveView As IActiveView

Dim pPixelBoundsEnv As IEnvelope = New Envelope

Dim exportRECT As tagRECT = New tagRECT

Dim iOutputResolution As Integer

Dim iScreenResolution As Integer

Dim hDC As Long

Dim pMxDoc As IMxDocument = My.ArcMap.Application.Document

Dim px1 As IExportPDF = New ExportPDF

Dim px2 As IExportPDF2 = New ExportPDF

Dim px3 As IExportPDF3 = New ExportPDF

Dim pExport As IExport = New ExportPDF

pExport.ExportFileName = "output.pdf"

iScreenResolution = 96

iOutputResolution = 600

'Can some layers be at 300 dpi and others at 600 dpi?

pExport.Resolution = iOutputResolution

With exportRECT

.left = 0

.top = 0

.right = pActiveView.ExportFrame.right * (iOutputResolution / iScreenResolution)

.bottom = pActiveView.ExportFrame.bottom * (iOutputResolution / iScreenResolution)

End With

pPixelBoundsEnv.PutCoords(exportRECT.left, exportRECT.top, exportRECT.right, exportRECT.bottom)

pExport.PixelBounds = pPixelBoundsEnv

hDC = pExport.StartExporting

pActiveView.Output(hdc,pExport.Resolution,exportRECT,Nothing, Nothing)

pExport.FinishExporting()

pExport.Cleanup()

createPDF = 1

End Function

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Perhaps the purpose can be accomplished with

px1.Compressed (I assume you would want px1.Compressed = true)

px1.ImageCompression = (Adaptive, Deflate, JPEG, LZW, None, RLE)

JPEG is lossy....Obviously with None you get no compression.

LZW is lossless...not sure about Adaptive/Deflate/RLE

px3.JPEGCompressionQuality - how much loss are you willing to tolerate in exchange for smaller file size?

Now any of these would affect your layers equally, no?

topic is it possible to draw layers at different resolutions in PDF? in ArcObjects SDK Questions