Module: ADIWG::Mdtranslator::Readers::Fgdc::MercatorProjection

Defined in:
lib/adiwg/mdtranslator/readers/fgdc/modules/mapProjections/projection_mercator.rb

Class Method Summary collapse

Class Method Details

.unpack(xParams, hProjection, hResponseObj) ⇒ Object 



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# File 'lib/adiwg/mdtranslator/readers/fgdc/modules/mapProjections/projection_mercator.rb', line 19

def self.unpack(xParams, hProjection, hResponseObj)

   # map projection 4.1.2.1.10 (mercator) - Mercator
   # -> ReferenceSystemParameters.projection.[ standardParallel1 | scaleFactorAtEquator ]
   unless xParams.empty?
      paramCount = 0

      # -> ReferenceSystemParameters.projection.standardParallel1
      # -> ReferenceSystemParameters.projection.standardParallel2
      paramCount += ProjectionCommon.unpackStandParallel(xParams, hProjection)

      # -> ReferenceSystemParameters.projection.scaleFactorAtEquator
      paramCount += ProjectionCommon.unpackSFEquator(xParams, hProjection)

      # -> ReferenceSystemParameters.projection.longitudeOfCentralMeridian
      paramCount += ProjectionCommon.unpackLongCM(xParams, hProjection)

      # -> ReferenceSystemParameters.projection.falseEasting
      # -> ReferenceSystemParameters.projection.falseNorthing
      paramCount += ProjectionCommon.unpackFalseNE(xParams, hProjection)

      # verify parameter count
      if paramCount == 4
         return hProjection
      else
         hResponseObj[:readerExecutionMessages] <<
            'WARNING: Mercator projection is missing one or more parameters'
      end
   end

   return nil

end