Use this tab to pick a source of correlation data for the image.
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Correlation Source
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When you select a correlation source from the list, the correlation values and other data on this tab is updated from the source.
Note: Asterisks (*) are displayed beside numeric values that are the default values assigned in the AutoCAD Raster Design Options dialog box.
Depending on image type, up to four sources can be used:
- Image File. Correlation data can be saved as part of the image file if the file type is RLC, IG4, IGS, GeoTags in GeoTIFF, or HDR File in SPOT.
- Image File. Correlation data can be saved as part of the image file if the file type is RLC, IG4, IGS, or HDR File in SPOT.
- Default. Refers to values set in the AutoCAD Raster Design Options Dialog Box.
- Resource File. A file created by the AutoCAD Raster Design toolset Export operation or previous versions of AutoCAD Raster Design toolset. Resource files have a .RES file extension.
- World File. A file created by the AutoCAD Raster Design toolset Export operation for all image formats, or by other applications. World files have different file extensions, depending on file type.
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Correlation Values
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Displays the X and Y coordinates of the insertion point (bottom left corner), rotation angle, and scale of the image as recorded in the correlation source.
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Density
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Displays the pixel density of the image.
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Units
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Displays the linear units of measure for the image.
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Coordinate System
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Displays the coordinate system used in the image, if applicable.
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Image File Name
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Displays the coordinate system used in the image, if applicable.
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Correlation File Name
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Displays the coordinate system used in the image, if applicable.