rutkowskima

ArcMap: Not scaling and/or rotating when exporting a map

Discussion created by rutkowskima on Jun 12, 2012
I am writing a console application using ArcGIS (engine or desktop). I'm trying to rotate and scale a map based on a polygon, and I'm not having any luck at all. With some tinkering, I can usually do one or the other but not both.

Anybody have any suggestions? I feel as though I've tried every variation in terms of rotating the map and adjusting the scale either using the Imap interface, or the IActiveView interface.

    Private Sub Zoom2AndExportJpgs(mapDocument As IMapDocument, imagePath As String)
        'Get the relevant strip maps for the route
        Dim map As IMap = mapDocument.Map(0) '(assumed that there is only one map in the mxd)
        Dim pageLayout As IPageLayout = mapDocument.PageLayout
        Dim pageAV As IActiveView = pageLayout
        Dim mapAV As IActiveView = map
        Try
            'get a list of strip map objects... EF object containing a list of the 4 corners of a polygon
            Dim stripmaps As List(Of MRLAStripMapExtent) = getStripMaps()
            Dim filename As String = ""

            'get all the associated stripmaps for the route  for each scale
            If Not stripmaps Is Nothing Then
                For i = 0 To stripmaps.Count - 1
                    Dim pgon As IPolygon = geometryHelper.CreatePGON(stripmaps(i).RectLowerLeftX, stripmaps(i).RectLowerLeftY, _
                                                                                                 stripmaps(i).RectLowerRightX, stripmaps(i).RectLowerRightY, _
                                                                                                 stripmaps(i).RectUpperLeftX, stripmaps(i).RectUpperLeftY, _
                                                                                                stripmaps(i).RectUpperRightX, stripmaps(i).RectUpperRightY)
                    filename = imagePath & stripmaps(i).ZoomScale & stripmaps(i).PageNumber & ".jpg"
                    CreateJpgFile(filename, mapAV, pageAV, pgon, stripmaps(i).ANGLE, stripmaps(i).ZoomScale)

                Next i
            End If

        Catch ex As Exception
            publishError.PublishError(publishError.ErrorSeverity.majorStopRouteProcessing, ex)
        End Try

    End Sub

    Private Sub CreateJpgFile(ByVal sFilename As String, ByVal pAV As ESRI.ArcGIS.Carto.IActiveView, _
                              ByVal pPageActiveView As ESRI.ArcGIS.Carto.IActiveView, _
                              ByVal pgon As IPolygon,
                              rotationAngle As Double, _
                              mapScale As Double)

        Dim pExport As ESRI.ArcGIS.Output.IExport
        pExport = New ESRI.ArcGIS.Output.ExportJPEG

        pAV.Extent = pgon.Envelope
        pAV.ScreenDisplay.DisplayTransformation.ScaleRatio = mapScale
        pAV.ScreenDisplay.DisplayTransformation.Rotation = rotationAngle '0
        pAV.Refresh()

        'Export Image....
        pExport.ExportFileName = sFilename
        pExport.Resolution = 96
        Dim exportRECT As ESRI.ArcGIS.esriSystem.tagRECT
        exportRECT = pPageActiveView.ExportFrame
        Dim pPixelBoundsEnv As ESRI.ArcGIS.Geometry.IEnvelope
        pPixelBoundsEnv = New ESRI.ArcGIS.Geometry.Envelope
        pPixelBoundsEnv.PutCoords(exportRECT.left, exportRECT.bottom, exportRECT.right, exportRECT.top)
        pExport.PixelBounds = pPixelBoundsEnv
        Dim hDC As Integer
        hDC = pExport.StartExporting
        pPageActiveView.Output(hDC, pExport.Resolution, exportRECT, Nothing, Nothing)

        'Finish writing the export file and cleanup any intermediate files.
        pExport.FinishExporting()
        pExport.Cleanup()
    End Sub

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