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reversegeojp-client

v0.1.1

Published

Minimal TypeScript/JavaScript client for the ReverseGeoJP API (Japan reverse geocoding & geocoding).

Readme

reversegeojp-client

ReverseGeoJP の公式軽量クライアントライブラリです。日本国内の緯度経度⇔住所(町丁目)変換APIを、TypeScript/JavaScriptから型付きで呼び出せます。

  • 依存パッケージなし(ランタイムは標準の fetch / URL のみ)
  • Node.js 18+、ブラウザ、Cloudflare Workers、Deno、Bunで動作
  • ESM専用

インストール

npm install reversegeojp-client

APIキーの取得

reversegeojp.com でアカウント登録すると発行されます。無料枠あり。

使い方

import { ReverseGeoJPClient } from 'reversegeojp-client';

const client = new ReverseGeoJPClient(process.env.REVERSEGEOJP_API_KEY!);

// 緯度経度 → 住所
const address = await client.reverse(35.6595, 139.6987);
console.log(address);
// { prefecture: '東京都', city: '渋谷区', town: '道玄坂二丁目', zipcode: '1500043', zipcode_candidates: [...], distance_m: 12.3 }

// 住所 → 候補(部分一致、最大10件)
const candidates = await client.geocode('渋谷区道玄坂');
console.log(candidates.results);

エラーハンドリング

import { ReverseGeoJPClient, ReverseGeoJPError } from 'reversegeojp-client';

try {
  await client.reverse(35.6595, 139.6987);
} catch (e) {
  if (e instanceof ReverseGeoJPError) {
    console.error(e.status, e.code, e.message, e.requestId);
    if (e.code === 'rate_limited') {
      console.log('retry after', e.retryAfter, 'seconds');
    }
  }
}

API

new ReverseGeoJPClient(apiKey, options?)

  • options.baseUrl — 既定は https://api.reversegeojp.com
  • options.fetch — カスタムfetch実装を注入したい場合に指定

client.reverse(lat, lon): Promise<ReverseResult>

client.geocode(address): Promise<GeocodeResult>

詳細な型定義は dist/index.d.ts を参照してください。

ライセンス

MIT