Module: ADIWG::Mdtranslator::Readers::Fgdc::MapGridUtm

Defined in:
lib/adiwg/mdtranslator/readers/fgdc/modules/gridSystems/grid_utm.rb

Class Method Summary collapse

Class Method Details

.unpack(xUTM, hProjection, hResponseObj) ⇒ Object 



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# File 'lib/adiwg/mdtranslator/readers/fgdc/modules/gridSystems/grid_utm.rb', line 17

def self.unpack(xUTM, hProjection, hResponseObj)

   # grid system 4.1.2.2.2 (utm) - universal transverse mercator

   hGridSystemId = hProjection[:gridIdentifier]
   hProjectionId = hProjection[:projectionIdentifier]

   hGridSystemId[:identifier] = 'utm'
   hGridSystemId[:name] = 'Universal Transverse Mercator' if hGridSystemId[:name].nil?

   # grid system 4.1.2.2.2.1 (utmzone) - utm zone number {-60..-1, 1..60} (required)
   # -> ReferenceSystemParameters.projection.gridZone
   zone = xUTM.xpath('./utmzone').text
   unless zone.empty?
      hProjection[:gridZone] = zone
   end
   if zone.empty?
      hResponseObj[:readerExecutionMessages] << 'WARNING: FGDC reader: UTM zone number is missing'
   end

   # + transverse mercator (required)
   xTransMer = xUTM.xpath('./transmer')
   unless xTransMer.empty?
      hProjectionId[:identifier] = 'transverseMercator'
      hProjectionId[:name] = 'Transverse Mercator'
      return TransverseMercatorProjection.unpack(xTransMer, hProjection, hResponseObj)
   end

   # error message
   hResponseObj[:readerExecutionMessages] <<
      'WARNING: FGDC reader: UTM transverse mercator definition is missing'

   return hProjection

end