首頁猿問 Javascript根據經度，緯度...

Javascript根據經度，緯度計算分數

JavaScript

RISEBY 2022-01-13 15:17:01

有人可以幫我檢查從地理位置計算分數的方法嗎？幫助將不勝感激我正在計算緯度、經度的分數，但沒有得到預期的結果。請在下面查看我的代碼。我不知道我做的是對還是錯這是代碼片段。請運行代碼并檢查輸出const suggestions = `{suggestions: [{name: "London, ON, Canada",latitude: 42.98339,longitude: -81.23304},{name: "Londontowne, MD, USA",latitude: 38.93345,longitude: -76.54941},{name: "London, OH, USA",latitude: 39.88645,longitude: -83.44825},{name: "Londonderry, NH, USA",latitude: 42.86509,longitude: -71.37395},{name: "New London, CT, USA",latitude: 41.35565,longitude: -72.09952},{name: "New London, WI, USA",latitude: 44.39276,longitude: -88.73983},{name: "London, KY, USA",latitude: 37.12898,longitude: -84.08326}]}`;console.log(calculateScore(suggestions, 43.70011, -79.4163))function calculateScore(suggestions, latitude, longitude) { const suggestionsResult = suggestions; for (let i = 0; i < suggestionsResult.length; i += 1) { let score = 0; const lat = Math.abs(suggestionsResult[i].latitude - latitude); const long = Math.abs(suggestionsResult[i].longitude - longitude); score = 10 - (lat + long) / 2; score = score > 0 ? Math.round(score) / 10 : 0; suggestionsResult[i].score = score; } return suggestionsResult; }預期輸出： suggestions: [{ name: "London, ON, Canada", latitude: 42.98339, longitude: -81.23304, score: 0.9 }, { name: "Londontowne, MD, USA", latitude: 38.93345, longitude: -76.54941, score: 0.5 }, { name: "London, OH, USA", latitude: 39.88645, longitude: -83.44825, score: 0.5 }, { name: "Londonderry, NH, USA", latitude: 42.86509, longitude: -71.37395, score: 0.5 }, { name: "New London, CT, USA", latitude: 41.35565, longitude: -72.09952, score: 0.5 },Please help me to check the above code. I am writing correctly.

查看完整描述

1 回答

繁星淼淼

TA貢獻1775條經驗獲得超11個贊

我認為您將字符串而不是對象傳遞給您的計算方法。

對于某些位置，分數與您要求的值不太匹配，它們顯示的分數為 0.6 而不是 0.5，盡管我相信邏輯是正確的。

例如，Londontowne, MD 與原點的距離為 3.82°（平均緯度/經度偏移），因此得分將為 round(10 - 3.82) = 6 / 10 = 0.6。

我添加了另一種計算分數的方法，(scoreII) 只是為了好玩，它將計算與原點的距離為 0 公里的 1.00 到 1000 公里或更大的 0.00 的值。（我使用了這個出色答案中的距離公式：calculate-distance-between-two-latitude-longitude-points-havesine-formula）

const suggestions = [ { name: "London, ON, Canada", latitude: 42.98339, longitude: -81.23304 }, { name: "Londontowne, MD, USA", latitude: 38.93345, longitude: -76.54941 }, { name: "London, OH, USA", latitude: 39.88645, longitude: -83.44825 }, { name: "Londonderry, NH, USA", latitude: 42.86509, longitude: -71.37395 }, { name: "New London, CT, USA", latitude: 41.35565, longitude: -72.09952 }, { name: "New London, WI, USA", latitude: 44.39276, longitude: -88.73983 }, { name: "London, KY, USA", latitude: 37.12898, longitude: -84.08326 } ];

console.log(calculateScore(suggestions, 43.70011, -79.4163))

function getDistanceFromLatLonInKm(lat1,lon1,lat2,lon2) {

var R = 6371; // Radius of the earth in km

var dLat = deg2rad(lat2-lat1); // deg2rad below

var dLon = deg2rad(lon2-lon1);

var a =

Math.sin(dLat/2) * Math.sin(dLat/2) +

Math.cos(deg2rad(lat1)) * Math.cos(deg2rad(lat2)) *

Math.sin(dLon/2) * Math.sin(dLon/2)

;

var c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1-a));

var d = R * c; // Distance in km

return d;

}

function deg2rad(deg) {

return deg * (Math.PI/180)

}

function calculateLocationScoreII(location, latitude, longitude) {

const distanceKm = getDistanceFromLatLonInKm(location.latitude, location.longitude, latitude, longitude);

let score = 1000 - distanceKm;

score = score > 0 ? Math.round(score/10) / 100 : 0;

return score;

}

function calculateLocationScore(location, latitude, longitude) {

const lat = Math.abs(location.latitude - latitude);

const long = Math.abs(location.longitude - longitude);

let score = 10 - (lat + long) / 2;

score = score > 0 ? Math.round(score) / 10 : 0;

return score;

}

function calculateScore(suggestions, latitude, longitude) {

// Clone the suggestions.

const suggestionsResult = suggestions.map(s => { return {...s}});

return suggestionsResult.map(suggestion => {

suggestion.score = calculateLocationScore(suggestion, latitude, longitude);

suggestion.scoreII = calculateLocationScoreII(suggestion, latitude, longitude);

return suggestion;

});

}

反對回復 2022-01-13

1 回答
0 關注
149 瀏覽

關注

添加回答

舉報

0/150

提交

取消

亚洲在线久爱草,狠狠天天香蕉网,天天搞日日干久草,伊人亚洲日本欧美

熱搜

最近搜索清空

Javascript根據經度，緯度計算分數

Javascript根據經度，緯度計算分數

1 回答

添加回答

Javascript根據經度，緯度計算分數

Javascript根據經度，緯度計算分數