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White background turns gray when exporting map to .jpg

September 09 2011 | 0 comments
Categories: ArcGIS 10

I have some black and white maps that I created in 9.3 that I have to update in 10. When I export the new version of the maps the white background is now gray. I have worked around the issue by making the dataframe background white and then adding a white polygon behind the entire composition but it would be nice to know if there was a more legitimate solution.

Thanks.

Mapping Center Answer:

The JPEG exporter allows you to select a background color so one thing you could check first is if the background color is set to something other than white (for instance gray). You can do this in the Export Map dialog under the Formats tab by checking the RGB values for the Background Color.

Alternatively, If you are using any kind of rasterizing symbology, it may add an undesired background color to the map because the whole map below that raster layer becomes rasterized. There is an ArcPy.Mapping script you can use on the ArcGIS Resource Center to check for transparency or rasterizing layers in the map.

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