Module: ADIWG::Mdtranslator::Readers::Fgdc::PlanarReference

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

Class Method Summary collapse

Class Method Details

.unpack(xPlanar, hResourceInfo, hResponseObj) ⇒ Object 



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# File 'lib/adiwg/mdtranslator/readers/fgdc/modules/module_horizontalPlanar.rb', line 22

def self.unpack(xPlanar, hResourceInfo, hResponseObj)

   # instance classes needed in script
   intMetadataClass = InternalMetadata.new
   hReferenceSystem = intMetadataClass.newSpatialReferenceSystem
   hSystemParameters = intMetadataClass.newReferenceSystemParameterSet
   hProjection = {}

   # get distance unit of measure for use in map projections and grid systems
   distanceUnits = nil
   xPlanCI = xPlanar.xpath('./planci')
   unless xPlanCI.empty?
      planDU = xPlanCI.xpath('./plandu').text
      unless planDU.empty?
         distanceUnits = planDU
      end
   end

   # planar reference 4.1.2.1 (mapproj) - map projection
   xMapProjection = xPlanar.xpath('./mapproj')
   unless xMapProjection.empty?
      hProjection = MapProjection.unpack(xMapProjection, hResponseObj)
   end

   # planar reference 4.1.2.2 (gridsys) - grid coordinate system
   xMapGrid = xPlanar.xpath('./gridsys')
   unless xMapGrid.empty?
      hProjection = MapGridSystem.unpack(xMapGrid, hResponseObj)
   end

   # planar reference 4.1.2.3 (localp) - local planar
   xMapLocal = xPlanar.xpath('./localp')
   unless xMapLocal.empty?
      hProjection = MapLocalPlanar.unpack(xMapLocal, hResponseObj)
   end

   # packing
   unless hProjection.nil? || hProjection.empty?
      unless distanceUnits.nil?
         hProjection[:falseEastingNorthingUnits] = distanceUnits
      end
      hSystemParameters[:projection] = hProjection
      hReferenceSystem[:systemParameterSet] = hSystemParameters
      hResourceInfo[:spatialReferenceSystems] << hReferenceSystem
   end

   # planar reference 4.1.2.4 (planci) - planar coordinate information
   xPlanarCI = xPlanar.xpath('./planci')
   unless xPlanarCI.empty?
      PlanarCoordinateInformation.unpack(xPlanarCI, hResourceInfo, hResponseObj)
   end

   return hResourceInfo

end