将纬度和经度转换为公里
Convert Latitude and Longitude into kms
我正在构建应用程序,使用以下代码
获取用户的 latitude
和 longitude
<!DOCTYPE html> <html> <body>
<p>Click the button to get your coordinates.</p>
<button onclick="getLocation()">Try It</button>
<p id="demo"></p>
<script> var x = document.getElementById("demo");
function getLocation() {
if (navigator.geolocation) {
navigator.geolocation.getCurrentPosition(showPosition);
} else {
x.innerHTML = "Geolocation is not supported by this browser.";
} }
function showPosition(position) {
x.innerHTML = "Latitude: " + position.coords.latitude +
"<br>Longitude: " + position.coords.longitude; } </script>
</body> </html>
现在我想把它转换成公里,这样我就可以与其他纬度和经度进行比较,并以公里为单位计算它们之间的差异。
考虑到纬度和经度是一个特定的点,您不能将其直接转换为千米,这是一个距离,即分隔 两个 点的长度。
但是你可以用数学公式得到两个坐标 (lat+long) 之间的距离。
我不是很擅长数学,但你可以通过在 Google 上简单搜索找到这样的公式:
here is the first result
您可能还会发现有关此主题的有用信息:
How to convert latitude or longitude to meters?
This Script is usefull for you, but its in php
function distance($lat1, $lon1, $lat2, $lon2, $unit) {
$theta = $lon1 - $lon2;
$dist = sin(deg2rad($lat1)) * sin(deg2rad($lat2)) + cos(deg2rad($lat1)) * cos(deg2rad($lat2)) * cos(deg2rad($theta));
$dist = acos($dist);
$dist = rad2deg($dist);
$miles = $dist * 60 * 1.1515;
$unit = strtoupper($unit);
if ($unit == "K") {
return ($miles * 1.609344);
} else if ($unit == "N") {
return ($miles * 0.8684);
} else {
return $miles;
}
}
Function to use
echo distance(32.9697, -96.80322, 29.46786, -98.53506, "M") . " Miles<br>";
echo distance(32.9697, -96.80322, 29.46786, -98.53506, "K") . " Kilometers<br>";
echo distance(32.9697, -96.80322, 29.46786, -98.53506, "N") . " Nautical Miles<br>";
您要找的是 Haversine formula; there's a PHP implementation here。
我正在构建应用程序,使用以下代码
获取用户的latitude
和 longitude
<!DOCTYPE html> <html> <body>
<p>Click the button to get your coordinates.</p>
<button onclick="getLocation()">Try It</button>
<p id="demo"></p>
<script> var x = document.getElementById("demo");
function getLocation() {
if (navigator.geolocation) {
navigator.geolocation.getCurrentPosition(showPosition);
} else {
x.innerHTML = "Geolocation is not supported by this browser.";
} }
function showPosition(position) {
x.innerHTML = "Latitude: " + position.coords.latitude +
"<br>Longitude: " + position.coords.longitude; } </script>
</body> </html>
现在我想把它转换成公里,这样我就可以与其他纬度和经度进行比较,并以公里为单位计算它们之间的差异。
考虑到纬度和经度是一个特定的点,您不能将其直接转换为千米,这是一个距离,即分隔 两个 点的长度。
但是你可以用数学公式得到两个坐标 (lat+long) 之间的距离。 我不是很擅长数学,但你可以通过在 Google 上简单搜索找到这样的公式: here is the first result
您可能还会发现有关此主题的有用信息: How to convert latitude or longitude to meters?
This Script is usefull for you, but its in php
function distance($lat1, $lon1, $lat2, $lon2, $unit) {
$theta = $lon1 - $lon2;
$dist = sin(deg2rad($lat1)) * sin(deg2rad($lat2)) + cos(deg2rad($lat1)) * cos(deg2rad($lat2)) * cos(deg2rad($theta));
$dist = acos($dist);
$dist = rad2deg($dist);
$miles = $dist * 60 * 1.1515;
$unit = strtoupper($unit);
if ($unit == "K") {
return ($miles * 1.609344);
} else if ($unit == "N") {
return ($miles * 0.8684);
} else {
return $miles;
}
}
Function to use
echo distance(32.9697, -96.80322, 29.46786, -98.53506, "M") . " Miles<br>";
echo distance(32.9697, -96.80322, 29.46786, -98.53506, "K") . " Kilometers<br>";
echo distance(32.9697, -96.80322, 29.46786, -98.53506, "N") . " Nautical Miles<br>";
您要找的是 Haversine formula; there's a PHP implementation here。