Module: XData

Defined in:
lib/xdata/file_reader.rb,
lib/xdata.rb,
lib/xdata/util.rb

Overview

factory = RGeo::Geographic.projected_factory(:projection_proj4 => ‘+proj=sterea lat_0=52.15616055555555 lon_0=5.38763888888889 k=0.9999079 x_0=155000 y_0=463000 ellps=bessel units=m no_defs ’) rd_factory = RGeo::Geographic.spherical_factory(:srid => 28992, :proj4 => amersfoort-rd-new) curved_factory = RGeo::Geographic.spherical_factory(:srid => 4326)

Defined Under Namespace

Classes: Exception, FileReader

Constant Summary collapse

VERSION = 
'0.1.2'
RD_P = 
Proj4::Projection.new('+proj=sterea +lat_0=52.15616055555555 +lon_0=5.38763888888889 +k=0.9999079 +x_0=155000 +y_0=463000 +ellps=bessel +units=m +no_defs')
LL_P = 
Proj4::Projection.new('+proj=longlat +ellps=WGS84 +datum=WGS84 +no_defs')

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.headers(url) ⇒ Object 



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# File 'lib/xdata/util.rb', line 55

def self.headers(url)
  begin
    uri = URI(url)
    http = Net::HTTP.new(uri.host, uri.port)
    if url.scheme == 'https'
      http.use_ssl = true
      http.verify_mode = OpenSSL::SSL::VERIFY_NONE
    end
    return http.head(uri.path.blank? ? "/" : uri.path).to_hash
  rescue
  end
  nil
end

.parse_json(str) ⇒ Object 



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# File 'lib/xdata/util.rb', line 87

def self.parse_json(str)
  begin
    return str.blank? ? {} : JSON.parse(str, symbolize_names: true)
  rescue Exception => e
    raise XData::Exception.new("#{e.message}; input: #{str}")
  end
end

.rd_to_wgs84(x, y) ⇒ Object 



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# File 'lib/xdata/util.rb', line 49

def self.rd_to_wgs84(x,y)
  srcPoint = Proj4::Point.new(x, y)
  dstPoint = RD_P.transform(LL_P, srcPoint)
  [dstPoint.lon * (180 / Math::PI), dstPoint.lat * (180 / Math::PI)]
end

Instance Method Details

#jsonlog(o) ⇒ Object

for debugging purposes…



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# File 'lib/xdata/util.rb', line 70

def jsonlog(o)
  STDERR.puts JSON.pretty_generate({ o.class.to_s => o })
end

#toPolygon(twopoints) ⇒ Object 



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# File 'lib/xdata/util.rb', line 33

def toPolygon(twopoints)
  lon1 = twopoints[0].lon
  lat1 = twopoints[0].lat
  lon2 = twopoints[1].lon
  lat2 = twopoints[1].lat
  
  if lon1.between?(-7000.0,300000.0) and lat1.between?(289000.0,629000.0)
    # Simple minded check for Dutch new rd system
    a = XData.rd_to_wgs84(lon1,lat1)
    lon1 = a[0]; lat1 = a[1]
    a = XData.rd_to_wgs84(lon2,lat2)
    lon2 = a[0]; lat2 = a[1]
  end
  return { type: 'Polygon', coordinates: [[lon1,lat1], [lon1,lat2], [lon2,lat2], [lon2,lat1], [lon1,lat1]] }
end