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AWS Heroes profile image Yasunori Kirimoto
Yasunori Kirimoto for AWS Heroes

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Building an Address Search Function with Amazon Location SDK and API Key Function

#maplibre #amazonlocationservice #aws #foss4g

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I built an address search function with Amazon Location SDK and API key. 🎉

In the past, to use the Amazon Location Service, you had the option of configuring it manually or using Amplify Geo. However, with the release of the Amazon Location SDK and API Key feature this year, more options are now available, and the Amazon Location SDK makes manual configuration easier. I would like to explain the address search feature using this new functionality in this article.

The created environment is available on GitHub. Please use it!

GitHub logo mug-jp / maplibregljs-amazon-location-service-place-indexes-starter

Easily start geocoding with MapLibre GL JS and Amazon Location Service.

maplibregljs-amazon-location-service-place-indexes-starter

README02

Easily start geocoding with MapLibre GL JS and Amazon Location Service.


blog

Building an Address Search Function with Amazon Location SDK and API key function


Usage

README03


Create Amazon Location Service "map", "API key(map)", "geocoding" and "API key(geocoding)"


Set "region", "API key(map)", "map name", "API key(geocoding)" and "geocoding name" in env file

VITE_REGION = xxxxx
VITE_MAP_API_KEY = v1.public.xxxxx
VITE_MAP_NAME = xxxxx
VITE_PLACE_API_KEY = v1.public.xxxxx
VITE_PLACE_NAME = xxxxx
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Install package

npm install
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build

npm run build
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dev

npm run dev
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README01


License

MIT

Copyright (c) 2023 MapLibre User Group Japan



Japanese


MapLibreGLJS & Amazon Location Service & ジオコーディング スターター

README02

MapLibre GL JSとAmazon Location Serviceでジオコーディングを手軽に始める


blog

Amazon Location SDKとAPIキーで住所検索機能を構築してみた


使用方法

README03


Amazon Location Serviceのマップ・APIキー(マップ)・ジオコーディング・APIキー(ジオコーディング)を作成


リージョン・APIキー(マップ)・マップ名・APIキー(ジオコーディング)・ジオコーディング名をenvファイルに設定

VITE_REGION = xxxxx
VITE_MAP_API_KEY = v1.public.xxxxx
VITE_MAP_NAME
…
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View on GitHub

Advance Preparation

  • Create an API key for Amazon Location Service

Amazon Location Service #004 - API Key Creation (Maps)
Amazon Location Service #005 - API Key Creation (Geocoding)

  • Use the built environment to get started with MapLibre GL JS and Amazon Location Service easily

maplibregljs-amazon-location-service-starter

Execution environment

  • node v20.6.1
  • npm v9.8.1

How to use the MapLibre GL JS and Amazon Location Service starter

Use the existing starter to build an address search function. Fork or download the package to your local environment and verify it works.

Install the package

npm install
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Start local server

npm run dev
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Install Amazon Location SDK

Next, install the necessary libraries for the Amazon Location SDK. Installing it will make it easier to authenticate the API and combine it with MapLibre GL JS.

Install the AWS SDK. "client-location" is an SDK that allows you to manipulate the Amazon Location Service.

npm install @aws-sdk/client-location
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Install "amazon-location-utilities-auth-helper," a library that facilitates authentication with Amazon Location Service API keys and Cognito.

npm install @aws/amazon-location-utilities-auth-helper
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Install "amazon-location-utilities-datatypes," a library that converts Amazon Location Service responses to GeoJSON format.

npm install @aws/amazon-location-utilities-datatypes
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I contributed to "amazon-location-utilities-datatypes" to add an optional feature because it was sometimes difficult to use in combination with MapLibre GL JS!

AWS Geospatial · GitHub

Open-source projects and sample codes from AWS Geospatial - AWS Geospatial

favicon github.com

Building an Address Search Function

Finally, we will build the address search function. Some files are changed from the starter.

Overall Configuration
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package.json 

{
  "name": "maplibregljs-amazon-location-service-place-indexes-starter",
  "version": "3.3.1",
  "description": "",
  "scripts": {
    "dev": "vite",
    "build": "tsc && vite build",
    "preview": "vite preview"
  },
  "keywords": [],
  "author": "MapLibre User Group Japan",
  "license": "ISC",
  "devDependencies": {
    "typescript": "^5.2.2",
    "vite": "^4.4.9"
  },
  "dependencies": {
    "@aws-sdk/client-location": "^3.433.0",
    "@aws/amazon-location-utilities-auth-helper": "^1.0.2",
    "@aws/amazon-location-utilities-datatypes": "^1.0.3",
    "maplibre-gl": "^3.3.1"
  }
}
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.env

Set the region, map API key, map name, geocoding API key, and geocoding name created in the preliminaries to the env file.

VITE_REGION = xxxxx
VITE_MAP_API_KEY = v1.public.xxxxx
VITE_MAP_NAME = xxxxx
VITE_PLACE_API_KEY = v1.public.xxxxx
VITE_PLACE_NAME = xxxxx
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/src

main.ts 

import './style.css'
import 'maplibre-gl/dist/maplibre-gl.css';
import maplibregl from 'maplibre-gl';
import { LocationClient, SearchPlaceIndexForTextCommand } from "@aws-sdk/client-location";
import { placeToFeatureCollection } from '@aws/amazon-location-utilities-datatypes';
import { withAPIKey } from '@aws/amazon-location-utilities-auth-helper';

const region = import.meta.env.VITE_REGION;
const mapApiKey = import.meta.env.VITE_MAP_API_KEY;
const mapName = import.meta.env.VITE_MAP_NAME;
const placeApiKey = import.meta.env.VITE_PLACE_API_KEY;
const placeName = import.meta.env.VITE_PLACE_NAME;

async function initialize() {
    const authHelper = await withAPIKey(placeApiKey);
    const client = new LocationClient({
        region: region,
        ...authHelper.getLocationClientConfig()
    });

    const input = {
        IndexName: placeName,
        Text: "サッポロファクトリー",
    };
    const command = new SearchPlaceIndexForTextCommand(input);
    const response = await client.send(command);
    const featureCollection = placeToFeatureCollection(response, {
        flattenProperties: true
    });

    const map = new maplibregl.Map({
        container: 'map',
        style: `https://maps.geo.${region}.amazonaws.com/maps/v0/maps/${mapName}/style-descriptor?key=${mapApiKey}`,
        center: [139.767, 35.681],
        zoom: 11,
    });
    map.addControl(
        new maplibregl.NavigationControl({
            visualizePitch: true,
        })
    );

    map.on('load', function () {
        map.addSource("search-result", {
            type: "geojson",
            data: featureCollection
        });
        map.addLayer({
            'id': "search-result",
            'type': 'circle',
            'source': 'search-result',
            'layout': {},
            'paint': {
                'circle-color': '#007cbf',
                'circle-radius': 10
            }
        });
        map.on('click', 'search-result', (e) => {
            const coordinates = e.lngLat;
            const description = e.features![0].properties['Place.Label'];
            new maplibregl.Popup()
                .setLngLat(coordinates)
                .setHTML(description)
                .addTo(map);
        });
        map.on('mouseenter', 'search-result', () => {
            map.getCanvas().style.cursor = 'pointer';
        });
        map.on('mouseleave', 'search-result', () => {
            map.getCanvas().style.cursor = '';
        });
    });
}
initialize();
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Define the Amazon Location SDK.

import { LocationClient, SearchPlaceIndexForTextCommand } from "@aws-sdk/client-location";
import { placeToFeatureCollection } from '@aws/amazon-location-utilities-datatypes';
import { withAPIKey } from '@aws/amazon-location-utilities-auth-helper';
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Set up authentication for the API key.

const authHelper = await withAPIKey(placeApiKey);
const client = new LocationClient({
    region: region,
    ...authHelper.getLocationClientConfig()
});
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Geocoding from text.

const input = {
    IndexName: placeName,
    Text: "サッポロファクトリー",
};
const command = new SearchPlaceIndexForTextCommand(input);
const response = await client.send(command);
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Convert the geocoding response to GeoJSON.

const featureCollection = placeToFeatureCollection(response, {
    flattenProperties: true
});
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Let's check with a simple local server.

npm run dev
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You can combine the Amazon Location SDK with the API key functionality to display the results of an address search!
img

Here are some other examples!

Geocoding from ID.

import { LocationClient, GetPlaceCommand } from "@aws-sdk/client-location";

...

    const input = {
        IndexName: placeName,
        PlaceId: "AQABAFkA9d5eLnjB7XKy9_p0QX3oXD4nrLodHDtIvvzOwEyHbBx9m7LhmUP9WoNILhCrNzsL_DzOmUqagzNOgEabayDDLe6Oxh0rXolepvlZamPS5Q4KX41udsz856yYG6UdXqO6JmoLazImn-Isq2p20k5q_0902-uClFkGTw"
    };
    const command = new GetPlaceCommand(input);

...
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img

Reverse geocoding from the specified location.

import { LocationClient, SearchPlaceIndexForPositionCommand } from "@aws-sdk/client-location";

...

    const input = {
        IndexName: placeName,
        Position: [139.767, 35.681],
    };
    const command = new SearchPlaceIndexForPositionCommand(input);

...
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img

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References
Amazon Location Service
MapLibre GL JS

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