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What is the bit depth of Esri grid rasters?
While Esri Grid rasters are always stored with a 32-bit depth (either as signed or unsigned integer, or floating point), ArcGIS will display the bit depth property with the most appropriate bit depth according to the range of cell values the raster contains.
Are there any raster formats that have bit depth?
This bit depth exists in a number of raster formats, including radar formats such as Radarsat, and .gff. There are exceptions when the true bit depth does not match the bit depth property within the Raster Properties window.
How many values can be stored in a raster file?
The bit depth (pixel depth) of a cell determines the range of values that a particular raster file can store, which is based on the formula 2n (where n is the bit depth). For example, an 8-bit raster can have 256 unique values that range from 0 to 255. The following table shows the range of values stored for different bit depths: Bit depth.
How is the bit depth displayed in ArcInfo?
ArcInfo Workstation always displays the bit depth of the grid. Esri’s products contain all the designations of unknown values within their raster datasets. The unknown values are NoData. Internally, a real value must be used to store the NoData cells.
What do I need to create a raster dataset?
The bit-depth (radiometric resolution) of the output raster dataset. If this is not specified, your raster dataset will be created with a default pixel type of 8-bit unsigned integer.
Where do you store raster data in ArcGIS?
Calculating statistics allows ArcGIS applications to properly stretch and symbolize raster data for display. The output location to store the raster dataset. The name, location and format for the dataset you are creating. When storing the raster dataset in a file format, you need to specify the file extension:
How many unique values are in an 8 bit raster?
For example, an 8-bit raster can have 256 unique values that range from 0 to 255. The following table shows the range of values stored for different bit depths: An additional type of bit depth, called complex, is supported for reading and displaying purposes.