IDL Data Types

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IDL Data Type	IDL Definition
BOOL	A single value (or array of values), true or false (not surrounded with quotes).
BYTE	An 8-bit unsigned integer (or array of integers) ranging in value from 0 to 255. Pixels in images are commonly represented as byte data.
Dictionary	A hash whose keys are case-insensitive strings that must be valid variable names. Access the key/value pairs using a "dot" notation.
DOUBLE	A 64-bit, double-precision, floating-point number (or array of numbers) in the range of ±10308 with approximately 15 or 16 significant digits.
FLOAT	A 32-bit, single-precision, floating-point number (or array of numbers) of ± 1038, with approximately six or seven significant digits.
Hash	A compound data type that contains a reference to a collection of key-value pairs. The key can be of any scalar type, and the value can be of any type. You can change the data types and values.
INT	A 16-bit signed integer (or array of integers) ranging from -32,768 to +32,767.
List	A compound data type that contains a reference to a collection of values. The individual values can be of any data type, and you can change the data types and values.
LONG	A 32-bit signed integer (or array of integers) ranging in value from -2,147,483,648 to +2 147,483,647.
ORDEREDHASH	A hash that preserves the order of the key/value pairs.
LONG64	A 64-bit signed integer (or array of integers) ranging in value from -9,223,372,036,854,775,808 to +9,223,372,036,854,775,807.
ULONG64	A 64-bit unsigned integer (or array of integers) ranging in value from 0 to 18,446,744,073,709,551,615.
String	A sequence of characters that is interpreted as text. You can specify a single string or an array of strings.
UINT	A 16-bit unsigned integer (or array of integers) ranging from 0 to 65,535.
ULONG	A 32-bit unsigned integer (or array of integers) ranging in value from 0 to 4,294,967,295.

ENVI Data Types

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Any ENVI API that implements a Dehydrate method is supported by the envitaskengine executable as JSON input and output. You can issue the Dehydrate method in an ENVI session on a given object to yield the dehydrated form of the object. This can be JSON-serialized as input to the envitaskengine executable later.

The following ENVI types are supported by the envitaskengine executable.

• ENVIAgCrops
• ENVIAnnotationSet
• ENVIDeepLearningLabelRaster
• ENVIDeepLearningRaster
• ENVIGCPSet
• ENVINITF

• ENVIPointCloud

• ENVIPointCloudProductsInfo
• ENVIRaster
• ENVIRasterMetadata
• ENVIRasterSeries
• ENVIROI
• ENVISpatialSubsetPointCloud
• ENVISpectralLibrary
• ENVITensorFlowModel
• ENVITiePointSet
• ENVITime
• ENVIURI
• ENVIVector
• ENVIVirtualizableURI
• ENVI Virtual Rasters
• Spatial reference data types:
  • ENVICoordSys
  • ENVIGLTRasterSpaitalRef
  • ENVIGridDefinition
  • ENVINITFCSMRasterSpatialRef
  • ENVIPseudoRasterSpatialRef
  • ENVIPointCloudSpatialRef
  • ENVIRPCRasterSpatialRef
  • ENVIStandardRasterSpatialRef

ENVIAgCrops

See the ENVIAgCrops::Dehydrate topic in the ENVI Crop Science Help.

ENVIAnnotationSet

See ENVIAnnotationSet::Dehydrate.

ENVIDeepLearningLabelRaster

See the ENVIDeepLearningRaster::Dehydrate topic in the ENVI Deep Learning Help.

ENVIDeepLearningRaster

See the ENVIDeepLearningRaster::Dehydrate topic in the ENVI Deep Learning Help.

ENVIGCPSet

See ENVIGCPSet::Dehydrate.

ENVINITF

See ENVINITF::Dehydrate.

ENVIPointCloud

See ENVIPointCloud::Dehydrate.

ENVIPointCloudProductsInfo

See ENVIPointCloudProductsInfo::Dehydrate.

ENVIRaster

See ENVIRaster::Dehydrate.

ENVIRasterMetadata

See ENVIRasterMetadata::Dehydrate.

ENVIRasterSeries

See ENVIRasterSeries::Dehydrate.

ENVIROI

See ENVIROI::Dehydrate.

ENVISpatialSubsetPointCloud

See ENVISpatialSubsetPointCloud::Dehydrate.

ENVISpectralLibrary

See ENVISpectralLibrary::Dehydrate.

ENVITensorFlowModel

See the ENVITensorFlowModel::Dehydrate topic in the ENVI Deep Learning Help.

ENVITiePointSet

See ENVITiePointSet::Dehydrate.

ENVITime

See ENVITime::Dehydrate.

ENVIURI

This data type is a string that references a filename or folder to use.

ENVIVector

See ENVIVector::Dehydrate.

ENVIVirtualizableURI

This data type is a string that references a filename or folder to use, or that virtual object output is requested.

ENVI Virtual Rasters

All Virtual Rasters have a dehydrated form. Refer to the help topic for each virtual raster.

Spatial Reference Data Types

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The following data types pertain to coordinate systems and spatial references in ENVI.

ENVICoordSys

See ENVICoordSys::Dehydrate.

ENVIGLTRasterSpatialRef

See ENVIGLTRasterSpatialRef::Dehydrate.

ENVIGridDefinition

See ENVIGridDefinition::Dehydrate.

ENVINITFCSMRasterSpatialRef

See ENVINITFCSMRasterSpatialRef::Dehydrate.

ENVIPseudoRasterSpatialRef

See ENVIPseudoRasterSpatialRef::Dehydrate.

ENVIPointCloudSpatialRef

See ENVIPointCloudSpatialRef::Dehydrate.

ENVIRPCRasterSpatialRef

See ENVIRPCRasterSpatialRef::Dehydrate.

ENVIStandardRasterSpatialRef

See ENVIStandardRasterSpatialRef::Dehydrate.