KeyMetadata - Esri/raster-functions GitHub Wiki

Key Metadata

Key metadata is the set of well-defined properties of an object.

Raster Dataset

The following key properties are applicable to a raster dataset.

  • DataType

    String

    Type of the data source associated with the raster. These are the recognized values:

    • Generic
    • Elevation
    • Processed
    • Thematic
    • Scientific
    • Vector-U
    • Vector-V
    • Vector-UV
    • Vector-Magnitude
    • Vector-Direction
    • Vector-MagDir
  • Variable

    String

    The name of the phenomenon being measured by pixel values of the raster. This key property is most likely to be available when DataType is Scientific. Here are some possible values:

    • Temperature
    • Pressure
    • Speed
    • Elevation
  • Dimensions

    String

    Names of non-spatial dimensions associated with the raster dataset as a semicolon-delimited string (for example: StdZ;StdTime). This property is most likely available when DataType is Scientific. The pixels in a raster typically represent measurements associated with a phenomenon (defined by Variable) across a geographical region (defined by the extents of the raster) at a particular 'location' in a high-dimensional space. Each of those dimensions is also likely available as property of the raster and contains the value associated with the obervation.

  • Unit

    String

    The unit of measure associated with the pixel values in the raster dataset.

    Distance:

    • esriInches
    • esriPoints
    • esriFeet
    • esriYards
    • esriMiles
    • esriNauticalMiles
    • esriMillimeters
    • esriCentimeters
    • esriMeters or Meters
    • esriKilometers
    • esriDecimalDegrees
    • esriDecimeters

    Temperature:

    • esriCelsius
    • esriFahrenheit
    • esriKelvin

    Speed:

    • esriMetersPerSecond
    • esriKilometersPerHour
    • esriKnots
    • esriFeetPerSecond
    • esriMilesPerHour

    Time:

    • ISO8601 (UTC time)

    Pressure:

    • Pascals
  • StdZ, StdZ_Max

    Float

    The value of the vertical dimension standardized to meters above sea-level. The *_Max dimension value is available when the phenomenon represented by the raster applies to an interval (a range of values) along the corresponding dimension.

  • StdTime, StdTime_Max

    DATE

    The value of the time dimension standardized to UTC and stored as an 8-byte double encoded as variant/OLE time representing days since/before December 30, 1899. The *_Max dimension value is available when the phenomenon represented by the raster applies to an interval (a range of values) along the corresponding dimension.

  • StdPressure, StdPressure_Max

    Float

    The value of the pressure dimension standardized to Pascals. The *_Max dimension value is available when the phenomenon represented by the raster applies to an interval (a range of values) along the corresponding dimension.

  • StdTemperature, StdTemperature_Max

    Float

    The value of the pressure dimension standardized to Kelvin. The *_Max dimension value is available when the phenomenon represented by the raster applies to an interval (a range of values) along the corresponding dimension.

  • AcquisitionDate

    DATE

    The date and time of scene's acquisition standardized to UTC and stored as an 8-byte double encoded as variant/OLE time representing days since/before December 30, 1899. This property is more likely to be available on a raster that represents a aerial or satellite image.

  • CloudCover

    Float

    The estimated percentage (0–100) of area within a raster covered by clouds.

  • SunAzimuth, SunElevation, SensorAzimuth, SensorElevation, OffNadir

    Float

    SunAzimuth: Position of the sun form the center of the scene relative to North. SunElevation: Elevation of the sun relative to the center of the image. SensorAzimuth: Position of the sensor relative to the center of the image. SensorElevation: Height of the sensor relative to the center of the image. OffNadir: Distance of satellite from Nadir.

  • PerspectiveX, PerspectiveY, PerspectiveZ

    Float

    TODO

  • SensorName, ProductName

    String

    TODO

  • BlockName

    String

    TODO

  • Segmented

    Boolean

    TODO

  • Footprint

    Polygon

    TODO

Raster Bands

  • BandName

    String

    The friendly-name associated with the raster band.

  • WavelengthMin, WavelengthMax

    Float

    TODO

  • SourceBandIndex

    Integer

    TODO

  • SolarIrradiance

    Float

    TODO

  • RadianceGain, RadianceBias

    Float

    TODO

  • ReflectanceGain, ReflectanceBias

    Float

    TODO

  • ThermalConstant_K1, ThermalConstant_K2

    Float

    TODO