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grid.html
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<!doctype html>
<html lang="en">
<head>
<!-- Required meta tags -->
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
<!-- The above 3 meta tags *must* come first in the head; any other head content must come *after* these tags -->
<meta name="description" content="QSO/ADIF Mapper">
<meta name="author" content="Stephen Houser">
<link rel="icon" href="favicon.ico">
<title>QSO/ADIF Mapper</title>
<!-- Bootstrap CSS -->
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/css/bootstrap.min.css" integrity="sha384-MCw98/SFnGE8fJT3GXwEOngsV7Zt27NXFoaoApmYm81iuXoPkFOJwJ8ERdknLPMO"
crossorigin="anonymous">
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css">
<!-- Custom styles for this template -->
<link href="qso-mapper.css" rel="stylesheet">
<script src="HamGridSquare/HamGridSquare.js"></script>
<script src="adif.js"></script>
</head>
<body>
<nav class="navbar navbar-expand-md navbar-dark bg-dark fixed-top">
<a class="navbar-brand" href="#">QSO Mapper</a>
<button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarsExampleDefault"
aria-controls="navbarsExampleDefault" aria-expanded="false" aria-label="Toggle navigation">
<span class="navbar-toggler-icon"></span>
</button>
<div class="collapse navbar-collapse" id="navbarsExampleDefault">
<ul class="navbar-nav mr-auto">
<li class="nav-item">
<a class="nav-link" href="index.html">Map</a>
</li>
<li class="nav-item active">
<a class="nav-link" href="grid.html">Grid <span class="sr-only">(current)</span></a>
</li>
<li class="nav-item">
<a class="nav-link" href="about.html">About</a>
</li>
</ul>
</div>
</nav>
<main role="main" class="container">
<div class="starter-template">
<h1>Maidenhead Locator Conversion</h1>
<p class="lead">Convert latitude and longitude to a Maidenhead (grid square) locator or a locator to corresponding
latitude and longitude.</p>
</div>
<form onsubmit="event.preventDefault(); computeGridSquare();">
<div class="row">
<div class="form-group col">
<label for="inputLatitude">Latitude</label>
<input id="inputLatitude"
type="text" class="form-control"
pattern="[-+]?[0-9]*\.?[0-9]+"
aria-describedby="latitudeHelp" placeholder="43.686292">
<small id="latitudeHelp" class="form-text text-muted">In decimal form, example: 43.686292</small>
</div>
<div class="form-group col">
<label for="inputLongitude">Longitude</label>
<input id="inputLongitude"
type="text" class="form-control"
pattern="[-+]?[0-9]*\.?[0-9]+"
placeholder="-70.549876">
<small id="longitudeHelp" class="form-text text-muted">In decimal form, example: -70.549876</small>
</div>
</div>
<div class="row text-center">
<div class="col">
<button type="submit" class="btn btn-primary" onclick="event.preventDefault(); computeGridSquare();">
<i class="fa fa-arrow-down"></i> to Grid Square <i class="fa fa-arrow-down"></i>
</button>
<button type="submit" class="btn btn-primary" onclick="event.preventDefault(); computeLatitudeLongitude();">
<i class="fa fa-arrow-up"></i> to Latitude/Longitude <i class="fa fa-arrow-up"></i>
</button>
</div>
</div>
<div class="row">
<div class="form-group col">
<label for="inputGridsquare">Maidenhead Gridsquare</label>
<input id="inputGridsquare"
type="text" class="form-control"
pattern="[A-X][A-X][0-9][0-9]([a-x][a-x])?"
placeholder="FN43rq">
<small id="longitudeHelp" class="form-text text-muted">4 or 6 character locator, example: FN43rq</small>
</div>
</div>
</form>
<div class="row text-center">
<div class="col">
<button type="submit" class="btn btn-primary" onclick="event.preventDefault(); showOnMap();">
Show on Map
</button>
</div>
</div>
</main>
<script>
function computeGridSquare(form) {
var lat = parseFloat(document.getElementById('inputLatitude').value);
var lon = parseFloat(document.getElementById('inputLongitude').value);
var gridField = document.getElementById('inputGridsquare');
gridField.value = gridForLatLon(lat, lon);
}
function computeLatitudeLongitude(form) {
var latField = document.getElementById('inputLatitude');
var lonField = document.getElementById('inputLongitude');
var grid = document.getElementById('inputGridsquare').value;
var [lat, lon] = latLonForGrid(grid);
latField.value = lat;
lonField.value = lon;
}
function showOnMap() {
var lat = parseFloat(document.getElementById('inputLatitude').value);
var lon = parseFloat(document.getElementById('inputLongitude').value);
window.open('https://www.google.com/maps/search/?api=1&query=' + lat + ',' + lon);
}
</script>
<!-- Bootstrap Optional JavaScript -->
<!-- jQuery first, then Popper.js, then Bootstrap JS -->
<script src="https://code.jquery.com/jquery-3.3.1.slim.min.js" integrity="sha384-q8i/X+965DzO0rT7abK41JStQIAqVgRVzpbzo5smXKp4YfRvH+8abtTE1Pi6jizo"
crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.3/umd/popper.min.js" integrity="sha384-ZMP7rVo3mIykV+2+9J3UJ46jBk0WLaUAdn689aCwoqbBJiSnjAK/l8WvCWPIPm49"
crossorigin="anonymous"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/js/bootstrap.min.js" integrity="sha384-ChfqqxuZUCnJSK3+MXmPNIyE6ZbWh2IMqE241rYiqJxyMiZ6OW/JmZQ5stwEULTy"
crossorigin="anonymous"></script>
</body>
</html>