250 lines
6.2 KiB
JavaScript
250 lines
6.2 KiB
JavaScript
goog.require('ol.Attribution');
|
|
goog.require('ol.Map');
|
|
goog.require('ol.View');
|
|
goog.require('ol.control');
|
|
goog.require('ol.control.ScaleLine');
|
|
goog.require('ol.layer.Tile');
|
|
goog.require('ol.proj');
|
|
goog.require('ol.proj.Projection');
|
|
goog.require('ol.source.TileWMS');
|
|
|
|
|
|
|
|
// By default OpenLayers does not know about the EPSG:21781 (Swiss) projection.
|
|
// So we create a projection instance for EPSG:21781 and pass it to
|
|
// ol.proj.addProjection to make it available to the library for lookup by its
|
|
// code.
|
|
|
|
var projection = new ol.proj.Projection({
|
|
code: 'EPSG:21781',
|
|
// The extent is used to determine zoom level 0. Recommended values for a
|
|
// projection's validity extent can be found at http://epsg.io/.
|
|
extent: [485869.5728, 76443.1884, 837076.5648, 299941.7864],
|
|
units: 'm'
|
|
});
|
|
ol.proj.addProjection(projection);
|
|
|
|
// We also declare EPSG:21781/EPSG:4326 transform functions. These functions
|
|
// are necessary for the ScaleLine control and when calling ol.proj.transform
|
|
// for setting the view's initial center (see below).
|
|
|
|
ol.proj.addCoordinateTransforms('EPSG:4326', projection,
|
|
function(coordinate) {
|
|
return [
|
|
WGStoCHy(coordinate[1], coordinate[0]),
|
|
WGStoCHx(coordinate[1], coordinate[0])
|
|
];
|
|
},
|
|
function(coordinate) {
|
|
return [
|
|
CHtoWGSlng(coordinate[0], coordinate[1]),
|
|
CHtoWGSlat(coordinate[0], coordinate[1])
|
|
];
|
|
});
|
|
|
|
var extent = [420000, 30000, 900000, 350000];
|
|
var layers = [
|
|
new ol.layer.Tile({
|
|
extent: extent,
|
|
source: new ol.source.TileWMS({
|
|
url: 'http://wms.geo.admin.ch/',
|
|
crossOrigin: 'anonymous',
|
|
attributions: [new ol.Attribution({
|
|
html: '© ' +
|
|
'<a href="http://www.geo.admin.ch/internet/geoportal/' +
|
|
'en/home.html">' +
|
|
'Pixelmap 1:1000000 / geo.admin.ch</a>'
|
|
})],
|
|
params: {
|
|
'LAYERS': 'ch.swisstopo.pixelkarte-farbe-pk1000.noscale',
|
|
'FORMAT': 'image/jpeg'
|
|
},
|
|
serverType: 'mapserver'
|
|
})
|
|
}),
|
|
new ol.layer.Tile({
|
|
extent: extent,
|
|
source: new ol.source.TileWMS({
|
|
url: 'http://wms.geo.admin.ch/',
|
|
crossOrigin: 'anonymous',
|
|
attributions: [new ol.Attribution({
|
|
html: '© ' +
|
|
'<a href="http://www.geo.admin.ch/internet/geoportal/' +
|
|
'en/home.html">' +
|
|
'National parks / geo.admin.ch</a>'
|
|
})],
|
|
params: {'LAYERS': 'ch.bafu.schutzgebiete-paerke_nationaler_bedeutung'},
|
|
serverType: 'mapserver'
|
|
})
|
|
})
|
|
];
|
|
|
|
var map = new ol.Map({
|
|
controls: ol.control.defaults().extend([
|
|
new ol.control.ScaleLine({
|
|
units: 'metric'
|
|
})
|
|
]),
|
|
layers: layers,
|
|
renderer: exampleNS.getRendererFromQueryString(),
|
|
target: 'map',
|
|
view: new ol.View({
|
|
projection: projection,
|
|
center: ol.proj.transform([8.23, 46.86], 'EPSG:4326', 'EPSG:21781'),
|
|
extent: extent,
|
|
zoom: 2
|
|
})
|
|
});
|
|
|
|
|
|
|
|
/*
|
|
* Swiss projection transform functions downloaded from
|
|
* http://www.swisstopo.admin.ch/internet/swisstopo/en/home/products/software/products/skripts.html
|
|
*/
|
|
|
|
// Convert WGS lat/long (° dec) to CH y
|
|
function WGStoCHy(lat, lng) {
|
|
|
|
// Converts degrees dec to sex
|
|
lat = DECtoSEX(lat);
|
|
lng = DECtoSEX(lng);
|
|
|
|
// Converts degrees to seconds (sex)
|
|
lat = DEGtoSEC(lat);
|
|
lng = DEGtoSEC(lng);
|
|
|
|
// Axiliary values (% Bern)
|
|
var lat_aux = (lat - 169028.66) / 10000;
|
|
var lng_aux = (lng - 26782.5) / 10000;
|
|
|
|
// Process Y
|
|
var y = 600072.37 +
|
|
211455.93 * lng_aux -
|
|
10938.51 * lng_aux * lat_aux -
|
|
0.36 * lng_aux * Math.pow(lat_aux, 2) -
|
|
44.54 * Math.pow(lng_aux, 3);
|
|
|
|
return y;
|
|
}
|
|
|
|
// Convert WGS lat/long (° dec) to CH x
|
|
function WGStoCHx(lat, lng) {
|
|
|
|
// Converts degrees dec to sex
|
|
lat = DECtoSEX(lat);
|
|
lng = DECtoSEX(lng);
|
|
|
|
// Converts degrees to seconds (sex)
|
|
lat = DEGtoSEC(lat);
|
|
lng = DEGtoSEC(lng);
|
|
|
|
// Axiliary values (% Bern)
|
|
var lat_aux = (lat - 169028.66) / 10000;
|
|
var lng_aux = (lng - 26782.5) / 10000;
|
|
|
|
// Process X
|
|
var x = 200147.07 +
|
|
308807.95 * lat_aux +
|
|
3745.25 * Math.pow(lng_aux, 2) +
|
|
76.63 * Math.pow(lat_aux, 2) -
|
|
194.56 * Math.pow(lng_aux, 2) * lat_aux +
|
|
119.79 * Math.pow(lat_aux, 3);
|
|
|
|
return x;
|
|
|
|
}
|
|
|
|
|
|
// Convert CH y/x to WGS lat
|
|
function CHtoWGSlat(y, x) {
|
|
|
|
// Converts militar to civil and to unit = 1000km
|
|
// Axiliary values (% Bern)
|
|
var y_aux = (y - 600000) / 1000000;
|
|
var x_aux = (x - 200000) / 1000000;
|
|
|
|
// Process lat
|
|
var lat = 16.9023892 +
|
|
3.238272 * x_aux -
|
|
0.270978 * Math.pow(y_aux, 2) -
|
|
0.002528 * Math.pow(x_aux, 2) -
|
|
0.0447 * Math.pow(y_aux, 2) * x_aux -
|
|
0.0140 * Math.pow(x_aux, 3);
|
|
|
|
// Unit 10000" to 1 " and converts seconds to degrees (dec)
|
|
lat = lat * 100 / 36;
|
|
|
|
return lat;
|
|
|
|
}
|
|
|
|
// Convert CH y/x to WGS long
|
|
function CHtoWGSlng(y, x) {
|
|
|
|
// Converts militar to civil and to unit = 1000km
|
|
// Axiliary values (% Bern)
|
|
var y_aux = (y - 600000) / 1000000;
|
|
var x_aux = (x - 200000) / 1000000;
|
|
|
|
// Process long
|
|
var lng = 2.6779094 +
|
|
4.728982 * y_aux +
|
|
0.791484 * y_aux * x_aux +
|
|
0.1306 * y_aux * Math.pow(x_aux, 2) -
|
|
0.0436 * Math.pow(y_aux, 3);
|
|
|
|
// Unit 10000" to 1 " and converts seconds to degrees (dec)
|
|
lng = lng * 100 / 36;
|
|
|
|
return lng;
|
|
|
|
}
|
|
|
|
|
|
// Convert SEX DMS angle to DEC
|
|
function SEXtoDEC(angle) {
|
|
|
|
// Extract DMS
|
|
var deg = parseInt(angle, 10);
|
|
var min = parseInt((angle - deg) * 100, 10);
|
|
var sec = (((angle - deg) * 100) - min) * 100;
|
|
|
|
// Result in degrees sex (dd.mmss)
|
|
return deg + (sec / 60 + min) / 60;
|
|
|
|
}
|
|
|
|
// Convert DEC angle to SEX DMS
|
|
function DECtoSEX(angle) {
|
|
|
|
// Extract DMS
|
|
var deg = parseInt(angle, 10);
|
|
var min = parseInt((angle - deg) * 60, 10);
|
|
var sec = (((angle - deg) * 60) - min) * 60;
|
|
|
|
// Result in degrees sex (dd.mmss)
|
|
return deg + min / 100 + sec / 10000;
|
|
|
|
}
|
|
|
|
// Convert Degrees angle to seconds
|
|
function DEGtoSEC(angle) {
|
|
|
|
// Extract DMS
|
|
var deg = parseInt(angle, 10);
|
|
var min = parseInt((angle - deg) * 100, 10);
|
|
var sec = (((angle - deg) * 100) - min) * 100;
|
|
|
|
// Avoid rounding problems with seconds=0
|
|
var parts = String(angle).split('.');
|
|
if (parts.length == 2 && parts[1].length == 2) {
|
|
min = Number(parts[1]);
|
|
sec = 0;
|
|
}
|
|
|
|
// Result in degrees sex (dd.mmss)
|
|
return sec + min * 60 + deg * 3600;
|
|
|
|
}
|