Raster type properties

There are properties for each raster type that you can modify before adding your raster data to a mosaic dataset. These include choosing a product type, specifying a particular band combination and a stretch, identifying the DEM for orthorectification, and modifying the parameters for pan sharpening. The properties that are available depend on what is supported by a particular raster type. Raster types are stored with .art extensions. Any time you make an edit to the raster type, you can save it to a new .art file so you can load additional data at another time using the same modifications.

You can access the properties of a raster type by picking the raster type in the Add Rasters To Mosaic Dataset tool dialog box then clicking the Properties button .

General properties

For each raster dataset, there are a number of product types and templates that help determine how the data is added and what functions may be applied by default. For example, if you choose the Landsat 7 ETM + raster type and choose its Level 1 product, you could choose the Pansharpen template, which will create a product using bands 1–5 and 7 that is pan sharpened using band 8. But if you choose Thermal, only the thermal bands, 6a and 6b, will be added.

The product type is specified by the vendor, which also determines the format of files that will be available, such as any metadata files and the raster file format, such as TIFF (one multiband TIFF or many one-band TIFFs). The processing templates are used to define different products that can be created from the input data and the function chains required to create them. For example, you may want to add all the bands as just raw bands; however, you may want to create a pan-sharpened output from your input data. For the first example, you would choose All Bands, and for the second example, you would choose Pansharpen.

Template properties

The product types and processing templates affect the properties on the Properties tab, which you can also modify. If, for example, you didn't want a pan-sharpened product using all six bands, you could specify the bands you wanted in the output, the weights for the inputs, and the pan-sharpening method (such as Brovey or ESRI). You can also specify the type of stretch you want applied to the histogram by default. If orthorectifying, you can specify the DEM.

Only the properties that apply to the product types and processing template are active on the Properties tab. Therefore, if you are not pan sharpening the input data, you cannot set the pan-sharpening properties. The following table lists the Properties tab options you may be able to edit:

Parameter	Description
Band Combination	A text box allowing you to enter a space-delimited list of the bands and the order you want them added.
Stretch
Type	Stretch applied to the histogram. None Standard Deviation Minimum-Maximum Percent Clip
Min	The minimum value applied if using the Minimum-Maximum stretch type or the percentage value for the low end of the histogram if using Percent Clip.
Max	The maximum value applied if using the Minimum-Maximum stretch type or the percentage value for the high end of the histogram if using Percent Clip.
n	The value applied if using the Standard Deviation stretch type.
Gamma Stretch	Allows you to specify a gamma stretch that will be applied to each band.
Pan-sharpening
Type	The method of pan-sharpening: Brovey—Uses the Brovey algorithm based on spectral modeling for data fusion ESRI—Uses the ESRI algorithm based on spectral modeling for data fusion IHS—Uses Intensity, Hue, and Saturation color space for data fusion Mean—Uses the averaged value between the red, green, and blue values and the panchromatic pixel value
Sharpen pan image	Allows you to apply a sharpening filter to the panchromatic band. None—No sharpening Sharpen—Uses a simple 3 by 3 sharpening kernel Sharpen More—Uses a simple 3 by 3 sharpening kernel but with a stronger effect than the Sharpen kernel
Band weights	A space-delimited list of weights that will be applied depending on the type of pan sharpening. The sum of all the band weights should equal 1.
4th-band as infrared image	Specifies that the fourth band is an infrared band and that it should be used by the algorithm depending on the type of pan sharpening.
Orthorectification using elevation
Average elevation	Uses the average z-value that is defined within the sensor definition.
Constant elevation	Uses the value entered in the text box.
DEM	Uses the DEM specified.
Elevation adjustment
Z offset	The base value to be added to the elevation value in the DEM. This could be used to offset elevation values that do not start at sea level.
Z factor	The scaling factor used to convert the elevation values. The scaling factor is used for two purposes: first, to convert the elevation units (such as meters or feet) to the horizontal coordinate units of the dataset, which may be feet, meters, or degrees, and second, to add vertical exaggeration for visual effect. To convert from feet to meters or vice versa, see the table below. For example, if your DEM's elevation units are feet and your mosaic dataset's units are meters, you would use a value of 0.3048 to convert your elevation units from feet to meters (1 foot = 0.3048 meters). This is also useful when you have geographic data (such as DTED in GCS_WGS 84 using latitude and longitude coordinates) where the elevation units are in meters. In this case, you need to convert from meters to degrees (0.00001; see below). The value for degree conversions are approximations. Units conversion factor From To Feet Meters Degrees Feet 1 0.3048 0.000003 Meters 3.28084 1 0.00001 Units conversion factor To apply vertical exaggeration, you must multiply the conversion factor by the exaggeration factor. For example, if both elevation and dataset coordinates are meters and you want to exaggerate by a multiple of 10, the scaling factor would be unit conversion factor (1.0 from the table) multiplied by the vertical exaggeration factor (10.0), or 10. As another example, if the elevations are meters and the dataset is geographic (degrees), you would multiply the units conversion factor (0.00001) by 10 to get 0.0001.
Geoid	If checked, a geoid correction will be made using a spherical model.

Lists of the Properties tab options for a raster type

Function properties

Functions can be applied to each raster in a mosaic dataset or on the entire mosaic dataset. These functions are dynamically applied to the raster data as the mosaicked image is accessed and viewed.

The Functions tab lists functions that will be applied and how or what order they will be applied. There may be a single function, such as the Stretch function, or they may be chained together to create a more advanced product.

The functions are organized by processing templates. Therefore, if you choose the Pansharpen template, you can view the function chain that will be applied to create this product. You can also modify the chain by adding or removing functions or the parameters of the functions by right-clicking within the window and selecting the appropriate command.