Sha256: e6ae84c1886d45105f7cb3998f7667dff6df4c6084b71e6385d058bc3c4ade53
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Size: 1.83 KB
Versions: 10
Compression:
Stored size: 1.83 KB
Contents
require 'ostruct'
module SpatialFeatures
module Importers
class KML < Base
private
def each_record(&block)
Nokogiri::XML(@data).css('Placemark').each do |placemark|
name = placemark.css('name').text
metadata = extract_metadata(placemark)
{'Polygon' => 'POLYGON', 'LineString' => 'LINE', 'Point' => 'POINT'}.each do |kml_type, sql_type|
placemark.css(kml_type).each do |placemark|
next if blank_placemark?(placemark)
yield OpenStruct.new(:feature_type => sql_type, :geog => geom_from_kml(placemark), :name => name, :metadata => metadata)
end
end
end
end
def blank_placemark?(placemark)
placemark.css('coordinates').text.blank?
end
def geom_from_kml(kml)
ActiveRecord::Base.connection.select_value("SELECT ST_GeomFromKML(#{ActiveRecord::Base.connection.quote(kml.to_s)})")
end
def extract_metadata(placemark)
metadata = {}
metadata.merge! extract_table(placemark)
metadata.merge! extract_extended_data(placemark)
metadata.merge! :description => placemark.css('description').text if metadata.empty?
metadata.delete_if {|key, value| value.blank? }
return metadata
end
def extract_extended_data(placemark)
metadata = {}
placemark.css('ExtendedData SimpleData').each do |node|
metadata[node['name']] = node.text
end
return metadata
end
def extract_table(placemark)
metadata = {}
placemark.css('description').each do |description|
Nokogiri::XML(description.text).css('html table table td').each_slice(2) do |key, value|
metadata[key.text] = value ? value.text : ''
end
end
return metadata
end
end
end
end
Version data entries
10 entries across 10 versions & 1 rubygems