Class: PbfReverseGeocoder::PbfTileReader

Inherits:
Object
  • Object
show all
Defined in:
lib/pbf_reverse_geocoder/pbf_tile_reader.rb

Constant Summary collapse

LAYER_NAMES =

サポートするレイヤー名

  • 最新のN03タイルをそのまま使う場合: N03

  • 互換用: @geolonia/open-reverse-geocoder の japanese-admins

['N03', 'N03-2025', 'japanese-admins'].freeze

Class Method Summary collapse

Class Method Details

.normalize_properties(props) ⇒ Hash

N03形式のプロパティを標準化

  • N03_* を pref/municipality/ward などに正規化

  • city は municipality と ward を連結した互換フィールド

Parameters:

  • props (Hash)

Returns:

  • (Hash) 


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# File 'lib/pbf_reverse_geocoder/pbf_tile_reader.rb', line 120

def self.normalize_properties(props)
  prefecture = props['prefecture'] || props['N03_001']
  sub_prefecture = props['sub_prefecture'] || props['N03_002']
  county = props['county'] || props['N03_003']
  municipality = props['municipality'] || props['city'] || props['N03_004']
  ward = props['ward'] || props['N03_005']

  code = props['code'] || props['N03_007'] || props['id']
  code = code.to_i.to_s if code.is_a?(Integer)
  code = code.to_s.rjust(5, '0') if code

  if ward.to_s.empty? && municipality == props['city']
    # 分離されていない市+区の文字列を分割（例: 大阪市中央区）
    if municipality && (m = municipality.match(/\A(.+市)(.+区)\z/))
      municipality = m[1]
      ward = m[2]
    end
  end

  city = props['city'] || [municipality, ward].compact.join

  result = {}
  result['prefecture'] = prefecture if prefecture
  result['sub_prefecture'] = sub_prefecture if sub_prefecture
  result['county'] = county if county
  result['municipality'] = municipality if municipality
  result['ward'] = ward if ward
  result['city'] = city unless city.nil? || city.empty?
  result['code'] = code if code

  result
end

.read_tile(tile_path, tile_x, tile_y, zoom) ⇒ Array<Hash>

PBFタイルを読み込んでフィーチャー一覧を返す

Examples:

features = PbfTileReader.read_tile('/app/public/tiles/10/904/403.pbf', 904, 403, 10)

Parameters:

  • tile_path (String, Pathname) —

    PBFファイルパス

  • tile_x (Integer) —

    タイルX座標

  • tile_y (Integer) —

    タイルY座標

  • zoom (Integer) —

    ズームレベル

Returns:

  • (Array<Hash>) —

    フィーチャー配列



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# File 'lib/pbf_reverse_geocoder/pbf_tile_reader.rb', line 28

def self.read_tile(tile_path, tile_x, tile_y, zoom)
  return [] unless File.exist?(tile_path)

  # バイナリ読み込み（gzipなら展開）
  pbf_data = File.binread(tile_path)
  if gzip?(pbf_data)
    begin
      pbf_data = Zlib::GzipReader.new(StringIO.new(pbf_data)).read
    rescue Zlib::GzipFile::Error
      warn "Failed to gunzip tile: #{tile_path}"
      return []
    end
  end

  # SimplePbfParserでパース
  tile = SimplePbfParser.parse(pbf_data)

  # japanese-admins レイヤーを抽出
  layer = find_layer(tile)
  return [] unless layer

  # フィーチャーをGeoJSON形式に変換
  layer[:features].map do |feature|
    geometry = GeometryDecoder.decode(feature[:geometry], tile_x, tile_y, zoom)
    properties = decode_properties(feature, layer)

    {
      geometry: geometry,
      properties: properties
    }
  end
rescue StandardError => e
  warn "Failed to read PBF tile: #{tile_path}, error: #{e.message}"
  warn e.backtrace.join("\n") if $DEBUG
  []
end