Module: ADIWG::Mdtranslator::Writers::SbJson::Spatial

Defined in:
lib/adiwg/mdtranslator/writers/sbJson/sections/sbJson_spatial.rb

Class Method Summary collapse

Class Method Details

.build(aExtents) ⇒ Object 



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# File 'lib/adiwg/mdtranslator/writers/sbJson/sections/sbJson_spatial.rb', line 13

def self.build(aExtents)

   aBoxObjects = []

   aExtents.each do |hExtent|
      hExtent[:geographicExtents].each do |hGeoExtent|
         # use computedBbox if exists
         # ... this is always exists if geographic extent has objects
         # otherwise use user provided boundingBox
         hBbox = {}
         if hGeoExtent[:computedBbox].empty?
            unless hGeoExtent[:boundingBox].empty?
               hBbox = hGeoExtent[:boundingBox]
            end
         else
            hBbox = hGeoExtent[:computedBbox]
         end

         # turn the box into a polygon
         unless hBbox.empty?
            sw = [ hBbox[:westLongitude], hBbox[:southLatitude] ]
            nw = [ hBbox[:westLongitude], hBbox[:northLatitude] ]
            ne = [ hBbox[:eastLongitude], hBbox[:northLatitude] ]
            se = [ hBbox[:eastLongitude], hBbox[:southLatitude] ]
            aPoly = [ sw, nw, ne, se ]
            geoJson = {
               type: 'Polygon',
               coordinates: [
                  aPoly
               ]
            }
            aBoxObjects << geoJson
         end

      end
   end

   spatial = {}

   unless aBoxObjects.empty?
      hBox = AdiwgCoordinates.computeBbox(aBoxObjects)
      sbBox = {}

      # transform to sbJson bbox format
      sbBox[:maxY] = hBox[:northLatitude]
      sbBox[:minY] = hBox[:southLatitude]
      sbBox[:maxX] = hBox[:eastLongitude]
      sbBox[:minX] = hBox[:westLongitude]
      spatial[:boundingBox] = sbBox
   end

   # sbJson representational point is not provided

   spatial

end