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| <!DOCTYPE html>
<html lang="fr" dir="ltr">
<head>
<meta http-equiv="cache-control" content="public, max-age=60">
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<meta name="author" content="Daniel Hagnoul">
<title>Test</title>
<style>
</style>
<script>
'use strict';
let GeoPoint = function(lon, lat) {
switch (typeof(lon)) {
case 'number':
this.lonDeg = this.dec2deg(lon, this.MAX_LON);
this.lonDec = lon;
break;
case 'string':
if (this.decode(lon)) {
this.lonDeg = lon;
}
this.lonDec = this.deg2dec(lon, this.MAX_LON);
break;
}
switch (typeof(lat)) {
case 'number':
this.latDeg = this.dec2deg(lat, this.MAX_LAT);
this.latDec = lat;
break;
case 'string':
if (this.decode(lat)) {
this.latDeg = lat;
}
this.latDec = this.deg2dec(lat, this.MAX_LAT);
break;
}
};
GeoPoint.prototype = {
CHAR_DEG : "\u00B0",
CHAR_MIN : "\u0027",
CHAR_SEC : "\u0022",
CHAR_SEP : "\u0020",
MAX_LON: 180,
MAX_LAT: 90,
// decimal
lonDec: NaN,
latDec: NaN,
// degrees
lonDeg: NaN,
latDeg: NaN,
dec2deg: function(value, max) {
var sign = value < 0 ? -1 : 1;
var abs = Math.abs(Math.round(value * 1000000));
if (abs > (max * 1000000)) {
return NaN;
}
var dec = abs % 1000000 / 1000000;
var deg = Math.floor(abs / 1000000) * sign;
var min = Math.floor(dec * 60);
var sec = (dec - min / 60) * 3600;
var result = "";
result += deg;
result += this.CHAR_DEG;
result += this.CHAR_SEP;
result += min;
result += this.CHAR_MIN;
result += this.CHAR_SEP;
result += sec.toFixed(2);
result += this.CHAR_SEC;
return result;
},
deg2dec: function(value) {
var matches = this.decode(value);
if (!matches) {
return NaN;
}
var deg = parseFloat(matches[1]);
var min = parseFloat(matches[2]);
var sec = parseFloat(matches[3]);
if (isNaN(deg) || isNaN(min) || isNaN(sec)) {
return NaN;
}
return deg + (min / 60.0) + (sec / 3600);
},
decode: function(value) {
var pattern = "";
// deg
pattern += "(-?\\d+)";
pattern += this.CHAR_DEG;
pattern += "\\s*";
// min
pattern += "(\\d+)";
pattern += this.CHAR_MIN;
pattern += "\\s*";
// sec
pattern += "(\\d+(?:\\.\\d+)?)";
pattern += this.CHAR_SEC;
return value.match(new RegExp(pattern));
},
getLonDec: function() {
return this.lonDec;
},
getLatDec: function() {
return this.latDec;
},
getLonDeg: function() {
return this.lonDeg;
},
getLatDeg: function() {
return this.latDeg;
}
};
document.addEventListener( 'DOMContentLoaded', ev => {
}, false );
window.addEventListener( 'load', ev => {
{
var lon = 24.0;
var lat = 15.876868;
var point = new GeoPoint(lon, lat);
console.log(point.getLonDeg()); // 24° 0' 0.00"
console.log(point.getLatDeg()); // 15° 52' 36.72"
}
{
var lon = 24.0;
var lat = -15.876868;
var point = new GeoPoint(lon, lat);
console.log(point.getLonDeg()); // 24° 0' 0.00"
console.log(point.getLatDeg()); // -15° 52' 36.72"
}
}, false );
</script>
</head>
<body>
<main>
</main>
</body>
</html> |
Décimale en Degrés Minutes Secondes
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