Package ucar.nc2.grib.grib2

Class Grib2SectionGridDefinition

  • public class Grib2SectionGridDefinition
extends Object
    The Grid Definition section 3 for GRIB-2 files 
      Octet Contents
  1–4   Length of section in octets (nn)
  5     Number of section (3)
  6     Source of grid definition (see Code table 3.0 and Note 1)
  7–10  Number of data points
  11    Number of octets for optional list of numbers (see Note 2)
  12    Interpretation of list of numbers (see Code table 3.11)
  13–14 Grid definition template number (= N) (see Code table 3.1)
  15–xx Grid definition template (see Template 3.N, where N is the grid definition template number given in octets 13–14)
  [xx+1]–nn Optional list of numbers defining number of points (see Notes 2, 3 and 4)
    Effectively immutable, but caching lazy gds
    Since:
    3/28/11

    • Constructor Detail

      • Grib2SectionGridDefinition

        public Grib2SectionGridDefinition​(byte[] rawData)
        Set Grib Definition section from byte array.
        Parameters:
        rawData - the byte array

    • Method Detail

      • getRawBytes

        public byte[] getRawBytes()
        get the raw bytes of the GDS
        Returns:
        GDS as byte[]

      • calcCRC

        public long calcCRC()
        Calculate the CRC of the entire byte array
        Returns:
        CRC of the entire byte array

      • getLength

        public int getLength()

      • getOffset

        public long getOffset()

      • getSource

        public int getSource()
        octet 6 source of grid definition (Code Table 3.0) "If octet 6 is not zero, octets 15–xx (15–nn if octet 11 is zero) may not be supplied. This should be documented with all bits set to 1 (missing value) in the grid definition template number."
        Returns:
        source

      • getNumberPoints

        public int getNumberPoints()
        octets 7-10 number of data points .
        Returns:
        numberPoints

      • getGDSTemplateNumber

        public int getGDSTemplateNumber()
        Get GDS Template number (code table 3.1)
        Returns:
        GDS Template number.