An overview of raster properties

Raster properties are properties of individual rasters before they are mosaicked together, but after raster processing, that can include typically radiometric and geometric processing of the raster.

You can open the Raster Properties dialog box by selecting a raster dataset in the image service definition group layer and clicking the Raster Properties button . The Raster Properties dialog box can only be opened when a single raster is selected.

Learn how to select rasters in an image service definition

On the Raster Properties dialog box, the properties are organized into five groups:

• Info—Provides basic information about the raster dataset, such as version, author, process generator, and creation date and time.
• General—Allows you to define or view key parameters about the raster dataset, such as the number of bands, a NoData value, and the unit of measure for the pixel size.
• Metadata—Displays the metadata related to the raster. The content depends on the raster type used to add the raster data.
• Processes—Allows you to specify the processes applied to a raster group by setting up process chains.
• Rasters—A single raster can contain multiple rasters. Each raster has its own properties.

If you change any values on the Raster Properties dialog box, these values are not automatically updated in the service table. You will have to build the image service definition to update the service table.

Info

Field	Description
Version	Version of raster process definition (.RPDef) file
Author	Author of the .RPDef file
Raster type ID	Name of the RPDef Generator component that created the .RPDef file
Creation date/time	Date and time the .RPDef file was created

Raster properties information

General

Field	Description
Raster name	A nonunique name that identifies the raster process definition. This is often the name of the source file or scene ID.
Spatial reference system	The spatial reference system of the raster or the result of the processes applied to the rasters.
Lower pixel size	The smallest pixel value among the actual pixel sizes of all rasters.
Higher pixel size	The largest pixel value among the actual pixel sizes of all rasters.
Bands	Number of bands in the raster process dataset. Band definition includes histogram and histogram statistics.
Pixel type	The data type representing each band. The available pixel type options are Byte, Unsigned 16-bit Integer, Signed 16-bit Integer, Unsigned 32-bit Integer, Signed 32-bit Integer, 32-bit Floating-point, 64-bit Floating-point, Complex 16-bit Integer, Complex 32-bit Integer, Complex 32-bit Floating-point, Complex 64-bit Floating-point, and Elevation.
Bit depth	Number of bits used by a pixel band.
Color space	Color space that defines the relationship between the bands of the pixel.
Pixel unit	Defines what the digital numbers in the image measure, such as col, rad, meter, and feet.
Feather width	Defines the default value of feather width of the seamline.
Feather width unit	Defines the default unit in which the feather width is specified for the seamline. The available units are pixel and meter.
Seamline type	Defines the type of seamline, either around or inside. In the around mode, feathering occurs on both sides of the seamline and is used when mosaicking aerial or satellite imagery. In the inside mode, feathering is only applied to the inside of the raster and is used when the extents of rasters are used (in terrain models, for example).
NoData value	The NoData value specifies how "no measurement" values are denoted.
Transparency	Defines whether NoData values are to be treated as transparent.

General raster properties

Metadata

The Metadata node will present any information stored in the raster process definition file. Not all raster types automatically contain metadata. If the raster process definition file does not contain any metadata, this node will not present any information.

Processes

The processes that can be applied to raster datasets are similar to the processes that can be applied to an image service definition but can include processes that change the geometry, such as orthorectification. To learn about processes, see An overview of image service definition processes.

Rasters

General tab

Field	Description
Raster ID	Unique identifier of the defined raster.
Description	A brief description of the raster.
Format	Defines the raster format module to use for reading the raster source.
Raster source	Full source of the raster data defined by this raster.
Source index	Source-dependent index of the raster source, which often corresponds to a layer in a multiresolution tile.
Enabled	Indicates whether this raster is enabled. Disabled rasters are invisible and are not directly used for mosaicking. Even though the disabled rasters are not visible or used, these rasters should not contain invalid processes. This may result in the Build operation failing while computing the output pixel properties.
Pixel size	The actual pixel size of the raster in meters.
Min. pixel size	The minimum pixel size value valid for this raster in meters.
Max. pixel size	The maximum pixel size value valid for this raster in meters.
NoData value	The NoData value specifies how "no measurement" values are denoted. If undefined, it is set based on the raster.
Derivation method	Specifies the method used to derive this raster. The different types of derivation methods are as follows: Primary—A base raster. Primary Internal Overview—Derived by sampling a primary raster to create a raster that is stored internally to the primary raster file. This type of imagery is generally not rederived, as the primary image does not change. Primary External Overview—Derived by sampling a primary raster to create a raster that is stored externally to the primary raster file. This type of imagery is generally not rederived, as the primary image does not change. Derived Image—An image generated by applying the raster process chain to the first (enabled) raster of a raster process definition. The raster is processed to cover the complete footprint. Derived images (when they exist) are utilized by the server in preference to the primary rasters. Derived External Overview—Overview of a derived raster created as a subsampled version of the raster item, which is stored externally to the primary raster file. Derived Tile—A tile of imagery that is created at a high resolution using the client default mosaic method. It is used in place of computing the raster on the fly when the client uses the system default or seamline mosaic methods. There are generally no overviews generated for derived tiles. Service Overview—A tile of a service that is created at a low resolution using the client default mosaic method and used to speed up the display of imagery at lower resolutions. 注意: If a client defines a mosaic method that is different from the default, the output image will still be created from the default mosaic method, which may be different from what the client is expecting.

General tab

Process tab

These processes are applied to individual rasters within a raster dataset.

Learn more about image service definition processes

Format Info tab

Field	Description
Number of columns	Number of columns of pixels in this raster.
Number of rows	Number of rows of pixels in this raster.
Skip bytes (Header)	Skip bytes from the start of the file.
Bands	Number of bands in the raster dataset.
Pixel type	The data type representing a band. The available pixel type options are Byte, Unsigned 16-bit Integer, Signed 16-bit Integer, Unsigned 32-bit Integer, Signed 32-bit Integer, 32-bit Floating-point, 64-bit Floating-point, Complex 16-bit Integer, Complex 32-bit Integer, Complex 32-bit Floating-point, Complex 64-bit Floating-point, and Elevation.
Bit depth	Number of bits used by each band of the pixel.
Color space	Color space that defines the relationship between the bands of the pixel.
Bands interleave	Interleave of pixels.
Tile height	Defines the height of the tile (tile is assumed to be a square). The value is 0 if the raster is not tiled.
Tile width	Defines the width of the tile (tile is assumed to be a square). The value is 0 if the raster is not tiled.
Compression method	Method for raster data compression.

Format Info tab