geomagJS/geomag.htm at master · cmweiss/geomagJS · GitHub

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<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title>Geomag Library Demo and Test</title>
		<style>
.labelr {
	text-align: right;
}

#testBody td {
	text-align: right;
	font-family: sans-serif;
}

#testBody td:first-child {
	text-align: left;
	font-family: serif;
}

		</style>
		<script src="newGeomag.js"></script>
		<script src="cof2Obj.js"></script>
		<script src="syncXHR.js"></script>
		<script>
/*jslint plusplus: true */
/*global geoMagFactory, cof2Obj, syncXHR, Element */
function decimalDate2Date(ddate) {
	'use strict';
	var year = Math.floor(ddate),
		daysInYear = 365 +
			(((year % 400 === 0) || (year % 4 === 0 && (year % 100 > 0))) ? 1 : 0),
		msInYear = daysInYear * 24 * 60 * 60 * 1000;
	return new Date((new Date(year, 0)).valueOf() + ((ddate - year) * msInYear));
}

var pathArr = window.location.href.split("/");
pathArr.pop();
var path = pathArr.join("/");
//var geoMag = geoMagFactory(cof2Obj(syncXHR(path + '/WMM.COF')));
var cof = syncXHR(path + '/WMM.COF');
var newGeomag = new Geomag(cof)
var geoMag = newGeomag.mag;
function runTest() {
	'use strict';

	function addAttribute(el, name, value) {
		el.setAttribute(name, value);
		return el;
	}

	var row,
		calc,
		i,
		testValues = (function (valueFile) {
			var i,
				lines = valueFile.replace(/\r/g, '').split('\n'),
				model = lines[0],
				fields,
				values = [];
			for (i = 2; i < lines.length; i++) {
				fields = lines[i].replace(/^\s+|\s+$/g, "").split(/\s+/);
				values.push({
					date: fields[0],
					alt: fields[1] * 3280.8399,
					lat: fields[2],
					lon: fields[3],
					d: fields[4],
					i: fields[5],
					h: fields[6],
					x: fields[7],
					y: fields[8],
					z: fields[9],
					f: fields[10],
					gv: fields[11] || null
				});
			}
			return {model: model, values: values};
		}(syncXHR(path + '/testValues.txt')));

	for (i = 0; i < testValues.values.length; i++) {
		row = document.createElement("tr");
		row.appendChild(document.createElement("td")).
			appendChild(document.createTextNode('Expected'));
		row.appendChild(addAttribute(document.createElement("td"), "rowSpan", 2)).
			appendChild(document.createTextNode(testValues.values[i].date));
		row.appendChild(addAttribute(document.createElement("td"), "rowSpan", 2)).
			appendChild(document.createTextNode(
				parseFloat(testValues.values[i].alt) / 3280.8399
			));
		row.appendChild(addAttribute(document.createElement("td"), "rowSpan", 2)).
			appendChild(document.createTextNode(testValues.values[i].lat));
		row.appendChild(addAttribute(document.createElement("td"), "rowSpan", 2)).
			appendChild(document.createTextNode(testValues.values[i].lon));
		row.appendChild(document.createElement("td")).
			appendChild(document.createTextNode(testValues.values[i].d));
		row.appendChild(document.createElement("td")).
			appendChild(document.createTextNode(testValues.values[i].i));
		row.appendChild(document.createElement("td")).
			appendChild(document.createTextNode(testValues.values[i].h));
		row.appendChild(document.createElement("td")).
			appendChild(document.createTextNode(testValues.values[i].x));
		row.appendChild(document.createElement("td")).
			appendChild(document.createTextNode(testValues.values[i].y));
		row.appendChild(document.createElement("td")).
			appendChild(document.createTextNode(testValues.values[i].z));
		row.appendChild(document.createElement("td")).
			appendChild(document.createTextNode(testValues.values[i].f));
		row.appendChild(document.createElement("td")).
			appendChild(document.createTextNode(testValues.values[i].gv || ''));
		document.getElementById("testBody").appendChild(row);
		calc = geoMag(parseFloat(testValues.values[i].lat),
			parseFloat(testValues.values[i].lon),
			parseFloat(testValues.values[i].alt),
			decimalDate2Date(parseFloat(testValues.values[i].date)));
		row = document.createElement("tr");
		row.appendChild(document.createElement("td")).
			appendChild(document.createTextNode('Calculated'));
		row.appendChild(document.createElement("td")).
			appendChild(document.createTextNode(calc.dec.toFixed(2)));
		row.appendChild(document.createElement("td")).
			appendChild(document.createTextNode(calc.dip.toFixed(2)));
		row.appendChild(document.createElement("td")).
			appendChild(document.createTextNode(calc.bh.toFixed(1)));
		row.appendChild(document.createElement("td")).
			appendChild(document.createTextNode(calc.bx.toFixed(1)));
		row.appendChild(document.createElement("td")).
			appendChild(document.createTextNode(calc.by.toFixed(1)));
		row.appendChild(document.createElement("td")).
			appendChild(document.createTextNode(calc.bz.toFixed(1)));
		row.appendChild(document.createElement("td")).
			appendChild(document.createTextNode(calc.ti.toFixed(1)));
		row.appendChild(document.createElement("td")).
			appendChild(document.createTextNode(
				calc.gv ? calc.gv.toFixed(2) : ''
			));
		document.getElementById("testBody").appendChild(row);
	}
}

function calculate() {
	'use strict';
	var lat = parseFloat(document.getElementById("lat").value),
		lon = parseFloat(document.getElementById("lon").value),
		alt = parseFloat(document.getElementById("alt").value),
		myGeoMag = geoMag(lat, lon, alt);
	document.getElementById("var").innerHTML = myGeoMag.dec;
}


function init() {
	'use strict';
	document.getElementById('calculate').onclick = calculate;
	runTest();
}
		</script>
	</head>
	<body>
	<h1>Geomag Library Demo and Test</h1>
	<p>This is a simple page to demonstrate the
	<a href="geomag.js">geomag.js</a>
	library which depends on <a href="WMM.COF">a world magnetic model
	coefficient file</a>.
	The coefficient file and more information are available at
	<a href="http://www.ngdc.noaa.gov/geomag/WMM/DoDWMM.shtml">The World
	Magnetic Model</a> site of NOAA's National Geophysical Data Center.</p>
	<p>The source code repository for the geomag.js library is at
	<a href="https://github.com/cmweiss/geomagJS">https://github.com/cmweiss/geomagJS</a>.
	</p>
	<table>
	<tr>
		<td class="labelr">Latitude:</td>
		<td><input type="text" id="lat" value="40" /></td>
		<td>(decimal degrees - north is positive)</td>
	</tr>
	<tr>
		<td class="labelr">Longitude:</td>
		<td><input type="text" id="lon" value="-80" /></td>
		<td>(decimal degrees - east is positive)</td>
	</tr>
	<tr>
		<td class="labelr">Altitude:</td>
		<td><input type="text" id="alt" value="0" /></td>
		<td>(feet)</td>
	</tr>
	<tr>
		<td class="labelr">Variation:</td>
		<td id="var"></td>
		<td>(decimal degrees - east is positive)</td>
	</tr>
	<tr>
		<td></td>
		<td><button id="calculate">Calculate</button></td>
		<td></td>
	</tr>
	</table>
	<table border style="border-collapse: collapse;">
	<tr><th colspan="13">Test</th></tr>
	<tr>
		<td colspan="13">
			<a href =
				"http://www.ngdc.noaa.gov/geomag/WMM/data/WMM2015/WMM2015testvalues.pdf"
			>World Magnetic Model (WMM2015) - Test values</a> (pdf)
		</td>
	</tr>
	<tr>
		<th></th>
		<th>Date</th>
		<th>Alt (km)</th>
		<th>Lat (deg)</th>
		<th>Lon (deg)</th>
		<th>D (deg)</th>
		<th>I (deg)</th>
		<th>H (nT)</th>
		<th>X (nT)</th>
		<th>Y (nT)</th>
		<th>Z (nT)</th>
		<th>F (nT)</th>
		<th>GV (deg)</th>
	</tr>
	<tbody id="testBody"></tbody>
	</table>
	<script>init(); </script>
	</body>
</html>