使用 Mapbox 选择附近的随机地点

Question

我目前正在查看 Mapbox Places Plugin for Android，似乎没有选择附近随机兴趣点（例如餐厅、咖啡馆、商店等）的功能。

我想插入一个坐标（Lat/Lng）到一个Mapbox API和return中，在一定半径内有一个随机的地点位置（地名和地点坐标）。

这可能吗？

I believe Point of interest category coverage 可能是我想要的，但是我不确定如何在 Android 上下文中使用它。

Answer 1

您可以使用 Mapbox Tilequery API 设置半径，然后最终得到一个随机点。

https://docs.mapbox.com/android/java/overview/tilequery/

https://docs.mapbox.com/android/java/examples/tilequery/

使用https://docs.mapbox.com/playground/tilequery/ to play with the Mapbox Tilequery API. For example, https://api.mapbox.com/v4/mapbox.mapbox-streets-v8/tilequery/-93.1393,44.946.json?limit=50&radius=1000&geometry=point&dedupe=true&access_token=PASTE_YOUR_MAPBOX_TOKEN_HERE.

确保您仅请求 point 几何图形。这是通过 .geometry("point") 和围绕 Tilequery API.

的 Mapbox Java SDK 包装器完成的

API 回复为您提供 FeatureCollection 个 Feature 个对象。然后随机选择一个 Feature 并使用其坐标：

Point randomPoint = (Point) apiResponseFeatureList.get(new Random().nextInt(apiResponseFeatureList.size())).geometry();

if (randomPoint != null) {
  randomPoint.latitude();
  randomPoint.longitude();
}

Answer 2

1) 做起来并不复杂。首先，您需要从点开始，围绕该点查找地点（一堆参数，如半径或地点限制）和下面的简单请求。

# A basic reverse geocoding request
# Retrieve places near a specific location

# curl it's library for request on Mac and Linux
$ curl "https://api.mapbox.com/geocoding/v5/mapbox.places/-73.989,40.733.json?access_token=YOUR_MAPBOX_ACCESS_TOKEN"

2) 正如您在上面看到的，Android 没有在 MapBox SDK 中实现。但是，在应用程序中将请求计划到您的 HTTP 库中并不是问题，例如 OkHttp。

作为响应，您可能会收到下一个结果，具体取决于您的搜索参数。下一步只是将它从 Json 序列化为 DTO。再次使用 OkHttp 库，您可以在飞行中完成。

{
    "type": "FeatureCollection",
    "query": [
        "825",
        "s",
        "milwaukee",
        "ave",
        "deerfield",
        "il",
        "60015"
    ],
    "features": [{
            "id": "address.4356035406756260",
            "type": "Feature",
            "place_type": [
                "address"
            ],
            "relevance": 1,
            "properties": {},
            "text": "Milwaukee Ave",
            "place_name": "825 Milwaukee Ave, Deerfield, Illinois 60015, United States",
            "matching_text": "South Milwaukee Avenue",
            "matching_place_name": "825 South Milwaukee Avenue, Deerfield, Illinois 60015, United States",
            "center": [
                -87.921434,
                42.166602
            ],
            "geometry": {
                "type": "Point",
                "coordinates": [
                    -87.921434,
                    42.166602
                ],
                "interpolated": true,
                "omitted": true
            },
            "address": "825",
            "context": [{
                    "id": "neighborhood.287187",
                    "text": "Lake Cook Road"
                },
                {
                    "id": "postcode.13903677306297990",
                    "text": "60015"
                },
                {
                    "id": "place.5958304312090910",
                    "wikidata": "Q287895",
                    "text": "Deerfield"
                },
                {
                    "id": "region.3290978600358810",
                    "short_code": "US-IL",
                    "wikidata": "Q1204",
                    "text": "Illinois"
                },
                {
                    "id": "country.9053006287256050",
                    "short_code": "us",
                    "wikidata": "Q30",
                    "text": "United States"
                }
            ]
        },
        {
            "id": "address.7464624790403620",
            "type": "Feature",
            "place_type": [
                "address"
            ],
            "relevance": 0.5,
            "properties": {},
            "text": "Milwaukee Ave",
            "place_name": "825 Milwaukee Ave, Wheeling, Illinois 60090, United States",
            "matching_text": "South Milwaukee Avenue",
            "matching_place_name": "825 South Milwaukee Avenue, Wheeling, Illinois 60090, United States",
            "center": [
                -87.910299,
                42.144504
            ],
            "geometry": {
                "type": "Point",
                "coordinates": [
                    -87.910299,
                    42.144504
                ],
                "interpolated": true
            },
            "address": "825",
            "context": [{
                    "id": "neighborhood.287187",
                    "text": "Lake Cook Road"
                },
                {
                    "id": "postcode.9418633295906190",
                    "text": "60090"
                },
                {
                    "id": "place.9902190947082220",
                    "wikidata": "Q935043",
                    "text": "Wheeling"
                },
                {
                    "id": "region.3290978600358810",
                    "short_code": "US-IL",
                    "wikidata": "Q1204",
                    "text": "Illinois"
                },
                {
                    "id": "country.9053006287256050",
                    "short_code": "us",
                    "wikidata": "Q30",
                    "text": "United States"
                }
            ]
        },
        {
            "id": "address.6472754353404224",
            "type": "Feature",
            "place_type": [
                "address"
            ],
            "relevance": 0.5,
            "properties": {},
            "text": "Milwaukee Avenue",
            "place_name": "825 Milwaukee Avenue, Glenview, Illinois 60025, United States",
            "matching_text": "South Milwaukee Avenue",
            "matching_place_name": "825 South Milwaukee Avenue, Glenview, Illinois 60025, United States",
            "center": [
                -87.852677,
                42.071152
            ],
            "geometry": {
                "type": "Point",
                "coordinates": [
                    -87.852677,
                    42.071152
                ]
            },
            "address": "825",
            "context": [{
                    "id": "neighborhood.275266",
                    "text": "Northfield Woods"
                },
                {
                    "id": "postcode.3787740186211610",
                    "text": "60025"
                },
                {
                    "id": "place.10211845459386970",
                    "wikidata": null,
                    "text": "Glenview"
                },
                {
                    "id": "region.3290978600358810",
                    "short_code": "US-IL",
                    "wikidata": "Q1204",
                    "text": "Illinois"
                },
                {
                    "id": "country.9053006287256050",
                    "short_code": "us",
                    "wikidata": "Q30",
                    "text": "United States"
                }
            ]
        },
        {
            "id": "address.1225436500189372",
            "type": "Feature",
            "place_type": [
                "address"
            ],
            "relevance": 0.5,
            "properties": {},
            "text": "Milwaukee Ave",
            "place_name": "825 Milwaukee Ave, Buffalo Grove, Illinois 60089, United States",
            "matching_text": "South Milwaukee Avenue",
            "matching_place_name": "825 South Milwaukee Avenue, Buffalo Grove, Illinois 60089, United States",
            "center": [
                -87.917484,
                42.158084
            ],
            "geometry": {
                "type": "Point",
                "coordinates": [
                    -87.917484,
                    42.158084
                ],
                "interpolated": true
            },
            "address": "825",
            "context": [{
                    "id": "neighborhood.287187",
                    "text": "Lake Cook Road"
                },
                {
                    "id": "postcode.11727721238210580",
                    "text": "60089"
                },
                {
                    "id": "place.8589721255665070",
                    "wikidata": "Q967086",
                    "text": "Buffalo Grove"
                },
                {
                    "id": "region.3290978600358810",
                    "short_code": "US-IL",
                    "wikidata": "Q1204",
                    "text": "Illinois"
                },
                {
                    "id": "country.9053006287256050",
                    "short_code": "us",
                    "wikidata": "Q30",
                    "text": "United States"
                }
            ]
        },
        {
            "id": "address.240107872738130",
            "type": "Feature",
            "place_type": [
                "address"
            ],
            "relevance": 0.5,
            "properties": {},
            "text": "Milwaukee Avenue",
            "place_name": "825 Milwaukee Avenue, Wheeling, Illinois 60090, United States",
            "matching_text": "South Milwaukee Avenue",
            "matching_place_name": "825 South Milwaukee Avenue, Wheeling, Illinois 60090, United States",
            "center": [
                -87.898319,
                42.126289
            ],
            "geometry": {
                "type": "Point",
                "coordinates": [
                    -87.898319,
                    42.126289
                ],
                "interpolated": true,
                "omitted": true
            },
            "address": "825",
            "context": [{
                    "id": "neighborhood.287189",
                    "text": "Milwaukee Avenue"
                },
                {
                    "id": "postcode.9418633295906190",
                    "text": "60090"
                },
                {
                    "id": "place.9902190947082220",
                    "wikidata": "Q935043",
                    "text": "Wheeling"
                },
                {
                    "id": "region.3290978600358810",
                    "short_code": "US-IL",
                    "wikidata": "Q1204",
                    "text": "Illinois"
                },
                {
                    "id": "country.9053006287256050",
                    "short_code": "us",
                    "wikidata": "Q30",
                    "text": "United States"
                }
            ]
        }
    ],
    "attribution": "NOTICE: © 2018 Mapbox and its suppliers. All rights reserved. Use of this data is subject to the Mapbox Terms of Service (https://www.mapbox.com/about/maps/). This response and the information it contains may not be retained. POI(s) provided by Foursquare."
}

3) 最后，该数据应序列化为 Collection 个对象。您可以简单地从结果中随机选择位置。

public static Item getRandomChestItem(List<Item> items) {
    return items.get(new Random().nextInt(items.size()));
}

PS. 从最初的请求中收到这个单品就好了。但是MapBox里面没有选项。从他们各自的角度来看，将 Map 用于随机位置是没有意义的。您可以尝试根据要求设置选项，但仅限 1 个位置。但由于图书馆的建议，这个地方可能不是随机的。

使用 Mapbox 选择附近的随机地点

Pick random Place nearby using Mapbox

android

mapbox