OpenSeaMap in Website

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You can include OpenSeaMap in various ways to the website:

Inhaltsverzeichnis


Embed as Static Map

(thumbnail)
Static Map

The easiest way you show a static image, and link it with the full map of OpenSeaMap:

  1. Search in OpenSeaMap the appropriate map section
  2. Press the key Print, so you copy the whole screen
    with the key combination <Alt-Print> you can selectively copy the currently active window
  3. Open an image editing program of your choice and add the screenshot with <Strg-v>
  4. Draw the desired information (text, lines, circles, areas)
  5. Save the image on your computer
  6. Load the image to your Web server
  7. Include the uploaded image in the article:
<img src="Path/Filename_of_Image" alt="Alternative_text" width="Width" height="Height">
Link a static map to the full screen map
(thumbnail)
with Link to Fullscreen Chart

You can link the map directly to OpenSeaMap. So by clicking on the map you opens the fullscreen map of OpenSeaMap in a new window. There you can zoom and move freely:

  1. Search in OpenSeaMap the appropriate map section
  2. Copy the permalink (on the map bottom right) by <Ctrl-c>
  3. Add the full permalink to your code by <Strg-v>
<a href="Permalink">
<img src="Path/Fileame_of_Image" alt="Alternative text" width="Width" height="Height">
</a>

Example:

<a href="http://www.openseamap.org/map/?zoom=18&lat=54.18171&lon=12.08555&layers=BFTTFFTFFTF0FF&lang=de">
<img src="../MapFullscreen.png" alt="show 'Teepott Warnemünde' to the chart" width="200" height="133">
</a>


(thumbnail)
Marker with speech bubble
Fullscreen chart with Marker and speech bubble

HoTo for displaying a marker plus text in a speech bubble

Embed as Slippy-Map

You can embed OpenSeaMap also dynamically on the site. Users will see your chosen section and the appropriate zoom level in the first load. He can zoom and move freely.

<iframe width="425" height="350" frameborder="0" scrolling="no" marginheight="0" marginwidth="0" 
src="http://www.openseamap.org/export/embed.html?bbox=-2.01,43.15,13.85,53.35&layer=mapnik" 
style="border: 1px solid black"></iframe>
<a href="http://www.openseamap.org/?lat=48.25&lon=5.92&zoom=5&layers=BFTTFFTFFTF0FF">Größere Karte anzeigen</a>

The yellow-marked values of the variables have the following meaning:

width With of the chart (pixel)
height Height of the chart (pixel)
bbox "Bounding-Box" (the 4 corners of the selected chart)
lat Latitude of the chart center
lat Longitude of the chart center
zoom Zoomlevel of the chart (4...18)

HTML code to embed in the map:


<html>
	<head>
		<meta http-equiv="content-type" content="text/html; charset=utf-8"/>
		<title>OpenSeaMap</title>


		<style type="text/css">
			.olImageLoadError {
				display: none !important;
			}
		</style>

		<!-- bring in the OpenLayers javascript library
			(here we bring it from the remote site, but you could
			easily serve up this javascript yourself) -->
		<script src="http://www.openlayers.org/api/OpenLayers.js"></script>

		<!-- bring in the OpenStreetMap OpenLayers layers.
			Using this hosted file will make sure we are kept up
			to date with any necessary changes -->
		<script src="http://www.openstreetmap.org/openlayers/OpenStreetMap.js"></script>
		<script type="text/javascript" src="http://map.openseamap.org/map/javascript/harbours.js"></script>
		<script type="text/javascript" src="http://map.openseamap.org/map/javascript/map_utils.js"></script>
		<script type="text/javascript" src="http://map.openseamap.org/map/javascript/utilities.js"></script>
		<script type="text/javascript">

			var map;
			var layer_mapnik;
			var layer_tah;
			var layer_seamark;
			var marker;

			// Position and zoomlevel of the map
			var lon = 12.0915;
			var lat = 54.1878;
			var zoom = 15;
				
			var linkTextSkipperGuide = "Beschreibung auf SkipperGuide";
			var linkTextWeatherHarbour = "Meteogramm";
			var language = 'de';

			
			function jumpTo(lon, lat, zoom) {
				var x = Lon2Merc(lon);
				var y = Lat2Merc(lat);
				map.setCenter(new OpenLayers.LonLat(x, y), zoom);
				return false;
			}

			function Lon2Merc(lon) {
				return 20037508.34 * lon / 180;
			}

			function Lat2Merc(lat) {
				var PI = 3.14159265358979323846;
				lat = Math.log(Math.tan( (90 + lat) * PI / 360)) / (PI / 180);
				return 20037508.34 * lat / 180;
			}

			function addMarker(layer, lon, lat, popupContentHTML) {
				var ll = new OpenLayers.LonLat(Lon2Merc(lon), Lat2Merc(lat));
				var feature = new OpenLayers.Feature(layer, ll);
				feature.closeBox = true;
				feature.popupClass = OpenLayers.Class(OpenLayers.Popup.FramedCloud, {minSize: new OpenLayers.Size(260, 100) } );
				feature.data.popupContentHTML = popupContentHTML;
				feature.data.overflow = "hidden";

				marker = new OpenLayers.Marker(ll);
				marker.feature = feature;

				var markerClick = function(evt) {
					if (this.popup == null) {
						this.popup = this.createPopup(this.closeBox);
						map.addPopup(this.popup);
						this.popup.show();
					} else {
						this.popup.toggle();
					}
					OpenLayers.Event.stop(evt);
				};
				marker.events.register("mousedown", feature, markerClick);

				layer.addMarker(marker);
				map.addPopup(feature.createPopup(feature.closeBox));
			}

			function getTileURL(bounds) {
				var res = this.map.getResolution();
				var x = Math.round((bounds.left - this.maxExtent.left) / (res * this.tileSize.w));
				var y = Math.round((this.maxExtent.top - bounds.top) / (res * this.tileSize.h));
				var z = this.map.getZoom();
				var limit = Math.pow(2, z);
				if (y < 0 || y >= limit) {
					return null;
				} else {
					x = ((x % limit) + limit) % limit;
					url = this.url;
					path= z + "/" + x + "/" + y + "." + this.type;
					if (url instanceof Array) {
						url = this.selectUrl(path, url);
					}
					return url+path;
				}
			}

			function drawmap() {


				map = new OpenLayers.Map('map', {
					projection: new OpenLayers.Projection("EPSG:900913"),
					displayProjection: new OpenLayers.Projection("EPSG:4326"),
					eventListeners: {
						"moveend": mapEventMove,
						//"zoomend": mapEventZoom
					},
					controls: [
						new OpenLayers.Control.Navigation(),
						new OpenLayers.Control.ScaleLine({topOutUnits : "nmi", bottomOutUnits: "km", topInUnits: 'nmi', bottomInUnits: 'km', maxWidth: '40'}),
						new OpenLayers.Control.LayerSwitcher(),
						new OpenLayers.Control.MousePosition(),
						new OpenLayers.Control.PanZoomBar()],
						maxExtent:
						new OpenLayers.Bounds(-20037508.34, -20037508.34, 20037508.34, 20037508.34),
					numZoomLevels: 18,
					maxResolution: 156543,
					units: 'meters'
				});

				// Add Layers to map-------------------------------------------------------------------------------------------------------
				// Mapnik
				layer_mapnik = new OpenLayers.Layer.OSM.Mapnik("Mapnik");
				// Seamark
				layer_seamark = new OpenLayers.Layer.TMS("Seezeichen", "http://tiles.openseamap.org/seamark/", { numZoomLevels: 18, type: 'png', getURL: getTileURL, isBaseLayer: false, displayOutsideMaxExtent: true});
				// Harbours
				layer_pois = new OpenLayers.Layer.Vector("Häfen", { projection: new OpenLayers.Projection("EPSG:4326"), visibility: true, displayOutsideMaxExtent:true});
				layer_pois.setOpacity(0.8);
				
				map.addLayers([layer_mapnik, layer_seamark, layer_pois]);
				jumpTo(lon, lat, zoom);

				// Update harbour layer
				refreshHarbours();
			}

			// Map event listener moved
			function mapEventMove(event) {
				// Update harbour layer
				refreshHarbours();
			}
	</script>

</head>

<!-- body.onload is called once the page is loaded (call the 'init' function) -->
<body onload="drawmap();">

    <!-- define a DIV into which the map will appear. Make it take up the whole window -->
    <div style="width:100%; height:100%" id="map"></div>

</body>

</html>

Tile-Server

The OpenSeaMap tile server is accessible at this URLs:

http://t1.openseamap.org/seamark/ 
http://tiles.openseamap.org/seamark/ 
Seamark-Layer

The seamark-layer is added with the following lines:

var layer_seamark = new OpenLayers.Layer.TMS ( "seamark", "http://t1.openseamap.org/seamark/", 
{ numZoomLevels: 18, type: 'png', getURL:getTileURL, isBaseLayer:false, displayOutsideMaxExtent:true });
map.addLayer(layer_seamark);

WordPress

In WordPress Blog there is a plugin to integrate slippy OpenSeaMaps:

WP OSM Plugin Downlaod @ WordPress.org
WP OSM Plugin Page
Sample how to integrate OpenSeaMap in WordPress

Drupal

In the Drupal-Center-Forum you can find some solutions with MappingKit:

TMS layer example
Map layers and taxonomy

Typo3

In the TYPO3 Extension Repository you will find 2 extensions:

  • rb_osmsimple (separate records for markers)
  • ods_osm (Coordinates in fe_users and tt_address records)