<?xml version="1.0" encoding="utf-8"?>
<PRONOM-Report xmlns="http://pronom.nationalarchives.gov.uk">
  <report_format_detail>
    <FileFormat>
      <FormatID>2388</FormatID>
      <FormatName>ERDAS Imagine Large Raster Spill File</FormatName>
      <FormatVersion>
      </FormatVersion>
      <FormatAliases>
      </FormatAliases>
      <FormatFamilies>
      </FormatFamilies>
      <FormatTypes>Aggregate</FormatTypes>
      <FormatDisclosure>
      </FormatDisclosure>
      <FormatDescription>.ige files are generated by ERDAS Imagine software, when the RRD file exceeds 2GB (or now 4GB, as suggested by some sources) in size. For these larger projects, two extra files are generated: .img files, and these ige files, which stores the actual image data.</FormatDescription>
      <BinaryFileFormat>
      </BinaryFileFormat>
      <ByteOrders>
      </ByteOrders>
      <ReleaseDate>
      </ReleaseDate>
      <WithdrawnDate>
      </WithdrawnDate>
      <ProvenanceSourceID>234</ProvenanceSourceID>
      <ProvenanceName>National Library of Australia / National Library of Australia</ProvenanceName>
      <ProvenanceSourceDate>24 Nov 2021</ProvenanceSourceDate>
      <ProvenanceDescription>
      </ProvenanceDescription>
      <LastUpdatedDate>24 Nov 2021</LastUpdatedDate>
      <FormatNote>Specification:  https://web.archive.org/web/20110205035551/http://home.gdal.org/projects/imagine/ige_format.html</FormatNote>
      <FormatRisk>
      </FormatRisk>
      <TechnicalEnvironment>
      </TechnicalEnvironment>
      <FileFormatIdentifier>
        <Identifier>fmt/1563</Identifier>
        <IdentifierType>PUID</IdentifierType>
      </FileFormatIdentifier>
      <ExternalSignature>
        <ExternalSignatureID>2845</ExternalSignatureID>
        <Signature>ige</Signature>
        <SignatureType>File extension</SignatureType>
      </ExternalSignature>
      <InternalSignature>
        <SignatureID>1907</SignatureID>
        <SignatureName>ERDAS Imagine Large Raster Spill File</SignatureName>
        <SignatureNote>Magic bytes:  ERDAS_IMG_EXTERNAL_RASTER</SignatureNote>
        <ByteSequence>
          <ByteSequenceID>2206</ByteSequenceID>
          <PositionType>Absolute from BOF</PositionType>
          <Offset>0</Offset>
          <MaxOffset>0</MaxOffset>
          <IndirectOffsetLocation>
          </IndirectOffsetLocation>
          <IndirectOffsetLength>
          </IndirectOffsetLength>
          <Endianness>
          </Endianness>
          <ByteSequenceValue>45524441535F494D475F45585445524E414C5F524153544552</ByteSequenceValue>
        </ByteSequence>
      </InternalSignature>
    </FileFormat>
    <SearchCriteria>Criteria</SearchCriteria>
  </report_format_detail>
</PRONOM-Report>
