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index.html
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<!DOCTYPE html>
<html>
<head>
<title>SignalK Tracker</title>
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no">
<style>
body {
padding: 0;
margin: 0;
}
html,
body,
#map {
height: 100%;
}
svg {
position: relative;
}
.targets {
position: absolute;
top: 0px;
left: 0px;
}
.targetlist {
background-image: url(FFFFFF-0.6.png);
font-family: sans-serif;
}
</style>
<link rel="stylesheet" href="bower_components/Leaflet.Easybutton/src/easy-button.css" />
<script src="dist/map.js"></script>
<script src="bower_components/Leaflet.EasyButton/src/easy-button.js"></script>
<link rel="stylesheet" href="bower_components/leaflet/dist/leaflet.css">
<link href="bower_components/components-font-awesome/css/font-awesome.css" rel="stylesheet">
</head>
<body class="leaflet-dragging">
<div id="map"></div>
<div class="targets">
<table class="targetlist" id="targetList">
</table>
</div>
</body>
<script>
var map = new L.Map("map", {
center: [37.8, -96.9],
zoomControl: false
});
map.setView([60.1, 24.8], 10);
new L.Control.Zoom({
position: 'topright'
}).addTo(map);
var homeButton = L.easyButton('<span style="font-size: 1.5em;">⌖</span>', function() {
if (selfLocation) {
map.panTo(selfLocation);
} else {
alert("No position for 'self' available. Using self id " + selfId)
}
});
homeButton.options.position = 'topright'
homeButton.addTo(map)
// Look if world coastline map ist locally available and use it
var tilemapUrl = false;
var tilemapMeta = false;
$.ajax({
// path of list of maps in Signal K server
url: "/signalk/v1/api/resources/charts",
async: false,
success: function(data) {
// Not the data we expected? URL wrong?
if (data === null) {
console.log("Signal K server not found.")
return;
}
if (typeof data !== 'object') {
console.log("Signal K server not found.")
return;
}
// Is the world coastline map installed?
if (typeof data['world-coastline.mbtiles'] !== 'undefined') {
// this will be "/charts/world-coastline.mbtiles/{z}/{x}/{y}"
console.log("Show the world coastline map.")
tilemapUrl = data['world-coastline.mbtiles'].tilemapUrl;
tilemapMeta = {
attribution: '© <a href="http://osm.org/copyright">OpenStreetMap</a> contributors',
maxZoom: 11,
tileSize: 1024,
zoomOffset: -2,
};
return;
}
// Is any other map installed on Signal K server?
if(!$.isEmptyObject(data)) {
// Take one map we randomly find in list of maps
$.each(data, function(index, firstMap) {
console.log("Map used: ", firstMap.identifier);
tilemapUrl = firstMap.tilemapUrl;
tilemapMeta = {
// We don't know the authors of an unknown map
attribution: '',
maxZoom: firstMap.maxzoom,
};
// exit each loop
return false;
});
return;
}
}
});
// Fallback to Internet tiles
if (!tilemapUrl) {
tilemapUrl = "http://{s}.tile.osm.org/{z}/{x}/{y}.png";
tilemapMeta = {
attribution: '© <a href="http://osm.org/copyright">OpenStreetMap</a> contributors',
maxZoom: 13,
};
}
L.tileLayer(tilemapUrl, tilemapMeta).addTo(map);
var svg = d3.select(map.getPanes().overlayPane).append("svg");
var g = svg.append("g").attr("class", "leaflet-zoom-hide");
var transform = d3.geo.transform({
point: projectPoint
});
var path = d3.geo.path().projection(transform);
map.on("viewreset", reset);
function updateMarkers(multiPointForBounds, targetsArray) {
var bounds = path.bounds(multiPointForBounds),
topLeft = bounds[0],
bottomRight = bounds[1];
svg.attr("width", bottomRight[0] - topLeft[0] + 20)
.attr("height", bottomRight[1] - topLeft[1] + 20)
.style("left", (topLeft[0] - 10) + "px")
.style("top", (topLeft[1] - 10) + "px");
g.attr("transform", "translate(" + (-topLeft[0] + 10) + "," + (-topLeft[1] + 10) + ")");
var vesselColor = d3.scale.linear()
.domain([0.9 * selfSpeed, selfSpeed, 1.1 * selfSpeed])
.range(['blue', 'grey', 'red']);
var boatData = g.selectAll('.vessel').data(targetsArray, function(d) {
return d.id
});
boatData.enter().append("polygon").attr("class", "vessel").attr('points', "0,-10 5,10 -5,10");
boatData
.attr("style", function(d, i) {
return isSelf(d.id) ? "fill:black" : "fill:" + vesselColor(d.sog);
})
.attr('transform', function(d) {
var point = map.latLngToLayerPoint(d.position);
return 'translate(' + point.x + ',' + point.y + ') rotate(' + d.cog + ')';
})
boatData.exit().remove();
}
function reset() {
var targetsArray = [];
var multiPointForBounds = {
"type": "MultiPoint",
"coordinates": []
};
var threshold = new Date().getTime() - (2 * 60 * 1000);
for (key in targets) {
if (targets[key].timestamp > threshold && targets[key].position) {
targetsArray.push(targets[key]);
multiPointForBounds.coordinates.push([targets[key].position.lng, targets[key].position.lat]);
} else {
delete targets[key];
}
};
targetsArray = targetsArray.sort(function(a, b) {
return b.sog - a.sog
});
var targetList = $('#targetList');
targetList.empty();
targetsArray.forEach(function(target) {
if (target.show) {
targetList.append('<tr><td>' + target.shortId + '</td><td>' + getName(target) + '</td><td>' +
target.sog + '</td></tr>');
}
});
updateMarkers(multiPointForBounds, targetsArray);
}
function getName(aisData) {
if (aisData.vesselInfo) {
if (aisData.vesselInfo.name) {
if (aisData.vesselInfo.name.value) {
return aisData.vesselInfo.name.value;
}
}
}
return '-';
}
// Use Leaflet to implement a D3 geometric transformation.
function projectPoint(x, y) {
var point = map.latLngToLayerPoint(new L.LatLng(y, x));
this.stream.point(point.x, point.y);
}
var targets = {};
var selfLocation;
selfId = '';
var selfSpeed = 0;
var useSsl = window.location.protocol === 'https:'
var client = new signalk.Client(window.location.hostname, window.location.port, useSsl);
var log = function (_) { console.log(_)}
var connection = client.connectDelta(window.location.host, onSignalK, log, log, log, log, 'all');
client.getSelfId().then(function(result) {
if (result.status === 200) {
selfId = result.body
console.log("selfId=" + selfId)
}
})
var doDraw = false;
var frameLength = 1000 / 2;
var lastFrame = 0;
var render = function() {
if (Date.now() - lastFrame > frameLength) {
lastFrame = Date.now()
if (doDraw) {
reset();
doDraw = false;
}
}
requestAnimationFrame(render);
};
requestAnimationFrame(render);
var rad2degrees = Qty.swiftConverter('rad', 'deg');
function getId(context) {
var result = context.split('[')[1];
if (result) {
result = result.split(']')[0];
if (result) {
return result
}
}
return context.split('.')[1];
}
function isSelf(id) {
return id === selfId || id === 'self'
}
function getShortId(id) {
var lastColonIndex = id.lastIndexOf(':');
return id.substring(lastColonIndex+1);
}
function onSignalK(_) {
if (_.context) {
var id = getId(_.context)
var aisData = targets[id];
if (!aisData) {
targets[id] = aisData = {
id: id,
shortId: getShortId(id),
show: true
};
$.ajax({
url: window.location.protocol + "//" + window.location.host + "/signalk/v1/api/vessels/" + id,
async: true,
success: function(vesselInfo) {
aisData.vesselInfo = vesselInfo;
}
});
};
_.updates
.forEach(function(update) {
update.values.forEach(function(value) {
aisData.timestamp = new Date().getTime();
if (value.path === 'navigation.position') {
targets[id].position = new L.LatLng(value.value.latitude, value.value.longitude);
if (isSelf(_.context)) {
var previousSelf = selfLocation
selfLocation = targets[id].position;
if (!previousSelf) {
map.panTo(selfLocation)
}
}
doDraw = true;
};
if (value.path === 'navigation.courseOverGroundTrue') {
aisData.cog = rad2degrees(value.value);
doDraw = true;
};
if (value.path === 'navigation.speedOverGround') {
if (value.value === 0 || typeof value.value === 'undefined') {
aisData.show = false;
}
aisData.sog = (value.value * 1.94384).toFixed(2);
doDraw = true;
if (isSelf(id)) {
selfSpeed = (value.value * 1.94384).toFixed(2);
}
}
if (value.path === '' && value.value.name ) {
if (!aisData.vesselInfo || !aisData.vesselInfo.name) {
aisData.vesselInfo = {
name: {
value: "-"
}
};
}
aisData.vesselInfo.name.value = value.value.name;
doDraw = true;
};
});
});
};
};
</script>