As we discussed in last week’s blog, many of you are using data that has already been set with the correct color, and therefore do not want any contrast stretching to be added.
Last week we discussed how to set the None stretch for any raster dataset added to ArcMap. This week we will show you how to set a property on a raster, so that is displays without a constrast stretch when it is added into ArcMap.
Setting a raster with no stretching as the default
The Source Type parameter on the Properties General tab allows you to set what type of data you may be dealing with. If you set this property to Processed then your raster will not use a contrast stretch by default.
To access this window, right-click on your raster dataset or mosaic dataset within the Catalog Window (or ArcCatalog), and click Properties. Then go to the general tab. Click the Switch to button, and choose “Processed”. Now when you add this raster to ArcGIS, it will use the None stretch by default.
Note: this cannot be performed for raster datasets that are stored as a geodatabase currently.
On a mosaic dataset
In ArcGIS 10.0 we added an option in the Default tab of the Mosaic Dataset Properties called “Is Processed Data”. At ArcGIS 10.1, we removed this from the Defaults tab and added the “Source Type” parameter in the General tab – to be consistent with a raster dataset.