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The 'current display extent' statistics option can be used to show better contrast stretching within a raster dataset.
Maps that are printed or exported with this option often have a striped or banded pattern of the data in the output. The stripes can be characterized by actual data that is banded with different saturations or intensities.
When displaying the 'current display extent' statistics on a monitor, it looks fine because the algorithm that calculates the statistics performs the calculation using the entire dataset.
When a map is printed or exported, it is processed as long rectangular strips of data. Each strip of data has slightly different statistics and therefore, because of the current display extent stretching, a slightly different rendering contrast stretch is calculated.
This can result in a striping or banding pattern on output.
There is no easy workaround for this issue at ArcGIS 9.0. The only true work around is to not print or export a raster while using the 'current display extent' statistics option. Instead, clip the raster dataset to the area desired, and then print or export it.
In ArcGIS versions 9.1 and later, there is a possible work around using some of the Symbology parameters. This workaround is to save the 'current display extent' statistics as an XML file. This XML file can then be loaded into the Custom Setting for statistics. Maps then properly export or print using the Custom Statistics option.
This raster dataset only uses the statistics that are contained in the raster dataset, which is the same as the statistics of the current display extent.