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Documentation Index

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All rasters must meet the following minimum standards, as well as any additional requirements within the specific Protocol or PDD.

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Data Format and Structure

  • Data must be provided in standard GeoTIFF (.tif) format.
  • Cloud-optimized GeoTIFF (COG) format is preferred for large datasets.
  • Files should follow consistent naming convention: ProjectID_RasterType_Resolution_YYYYMMDD.
  • Multi-band rasters should be provided as single files rather than separate files per band.
  • Internal tiling and compression should be used for files larger than 1GB.
  • Overviews (pyramids) should be embedded in the file.

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Data Requirements

  • Must use a defined coordinate reference system that matches project requirements.
  • Spatial resolution must be clearly specified and appropriate for the project needs.
  • No data values must be properly defined and consistent across all bands.
  • For multi-temporal data, all rasters must be co-registered with sub-pixel accuracy.
  • Pixel values must use appropriate data types:
    • 8-bit unsigned integer for categorical data
    • 16-bit unsigned integer for imagery
    • 32-bit float for continuous variables
  • All rasters must be properly geo-referenced with an accuracy of at least 1 pixel.

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File Metadata

  • Metadata should be ISO 19115 compliant and include:
    • Unique persistent identifier for the dataset
    • Acquisition date and time
    • Sensor/source information including calibration parameters
    • Processing level and detailed methodology
    • Atmospheric correction method and parameters (if applicable)
    • Band information including:
      • Wavelength ranges
      • Units of measurement
      • Scale factors and offsets
      • Valid data ranges
    • Spatial resolution and pixel size
    • Coordinate reference system details
    • Data gaps or quality flags explanation
    • Processing software and versions used
    • Source data references and lineage
    • Access and usage restrictions
    • Keywords following standardized vocabularies
    • Point of contact information
  • Metadata should delineate quality assessment results including:
    • Geometric accuracy metrics
    • Radiometric calibration results
    • Cloud cover percentage and mask generation method (if applicable)