RasterPyramidCompressionType enum
An enumeration of the various types of compression used when creating or describing raster pyramids.
Use this enumeration with BuildRasterPyramidsParameters.compressionType to specify the compression requested when building pyramids.
Support depends on the raster format and pixel type. File-based rasters that support pyramids in a pyramid file (.ovr) can generally request these values. JPEG-based compression is generally appropriate only for compatible imagery where smaller file size is more important than preserving exact pixel values.
Values
- default_ → const RasterPyramidCompressionType
-
Uses the default pyramid compression for the raster.
The default compression is determined by the runtime based on the raster.
- deflate → const RasterPyramidCompressionType
-
Deflate compression.
Deflate is a lossless compression method that combines LZ77-style matching with Huffman coding. It preserves original pixel values and is a good general-purpose option for TIFF, GeoTIFF, and overview files.
- jpeg → const RasterPyramidCompressionType
-
JPEG compression.
JPEG compression is lossy and is intended for imagery where smaller file size is more important than preserving exact pixel values. It is not ideal for classified or analytical rasters.
- jpegYCbCr → const RasterPyramidCompressionType
-
JPEG compression with YCbCr color space.
JPEG YCbCr compression separates brightness from color components. It is commonly used for compatible RGB imagery and often produces smaller files than standard RGB JPEG compression while maintaining good visual quality.
- lzw → const RasterPyramidCompressionType
-
LZW compression.
LZW is a lossless, dictionary-based compression method derived from the Lempel-Ziv-Welch algorithm. It preserves original pixel values and is commonly used with TIFF and GeoTIFF rasters.
- none → const RasterPyramidCompressionType
-
No compression.
This value requests uncompressed pyramids. It can be useful when avoiding compression artifacts or compatibility issues, but typically creates larger pyramid files.
Properties
- coreValue → RT_RasterPyramidCompressionType
-
Convert to internal value.
no setter
- hashCode → int
-
The hash code for this object.
no setterinherited
- index → int
-
A numeric identifier for the enumerated value.
no setterinherited
- name → String
-
Available on Enum, provided by the EnumName extension
The name of the enum value.no setter - runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
Methods
-
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a nonexistent method or property is accessed.
inherited
-
toString(
) → String -
A string representation of this object.
inherited
Operators
-
operator ==(
Object other) → bool -
The equality operator.
inherited
Constants
-
values
→ const List<
RasterPyramidCompressionType> - A constant List of the values in this enum, in order of their declaration.