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Merge pull request #1228 from ahocevar/new-proj4js

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Use the new proj4.js
This commit is contained in:
Andreas Hocevar
2014-07-10 13:31:17 +02:00
parent a737cf0d99 7789bff3da
commit 9640a08c0e
12 changed files with 366 additions and 413 deletions
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9
examples/wms-custom-proj.html
View File

@@ -8,7 +8,7 @@
<link rel="stylesheet" href="../resources/bootstrap/css/bootstrap.min.css" type="text/css">
<link rel="stylesheet" href="../resources/layout.css" type="text/css">
<link rel="stylesheet" href="../resources/bootstrap/css/bootstrap-responsive.min.css" type="text/css">
<title>Tiled WMS with Proj4js projection example</title>
<title>Tiled WMS with custom projection example</title>
</head>
<body>
@@ -31,21 +31,18 @@
<div class="row-fluid">
<div class="span12">
<h4 id="title">Tiled WMS with Proj4js projection example</h4>
<h4 id="title">Tiled WMS with custom projection example</h4>
<p id="shortdesc">Example of two tiled WMS layers (Pixelmap 1:1'000'000 and national parks) using the projection EPSG:21781.</p>
<div id="docs">
<p>See the <a href="wms-custom-proj.js" target="_blank">wms-custom-proj.js source</a> to see how this is done.</p>
</div>
<div id="tags">wms, tile, tilelayer, proj4js, projection</div>
<div id="tags">wms, tile, tilelayer, projection</div>
</div>
</div>
</div>
<script src="jquery.min.js" type="text/javascript"></script>
<script src="http://cdnjs.cloudflare.com/ajax/libs/proj4js/1.1.0/proj4js-compressed.js" type="text/javascript"></script>
<script src="http://cdnjs.cloudflare.com/ajax/libs/proj4js/1.1.0/defs/EPSG21781.js" type="text/javascript"></script>
<script src="../resources/example-behaviour.js" type="text/javascript"></script>
<script src="loader.js?id=wms-custom-proj" type="text/javascript"></script>

186
examples/wms-custom-proj.js
View File

@@ -5,13 +5,41 @@ 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');
var projection = ol.proj.configureProj4jsProjection({
// 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.
var projection = new ol.proj.Projection({
code: 'EPSG:21781',
extent: [485869.5728, 76443.1884, 837076.5648, 299941.7864]
// 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 = [
@@ -61,8 +89,160 @@ var map = new ol.Map({
target: 'map',
view: new ol.View({
projection: projection,
center: [660000, 190000],
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;
}

10
examples/wms-image-custom-proj.html
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@@ -8,7 +8,7 @@
<link rel="stylesheet" href="../resources/bootstrap/css/bootstrap.min.css" type="text/css">
<link rel="stylesheet" href="../resources/layout.css" type="text/css">
<link rel="stylesheet" href="../resources/bootstrap/css/bootstrap-responsive.min.css" type="text/css">
<title>Single image WMS with custom projection example</title>
<title>Single image WMS with Proj4js projection example</title>
</head>
<body>
@@ -31,13 +31,13 @@
<div class="row-fluid">
<div class="span12">
<h4 id="title">Single image WMS with custom projection example</h4>
<h4 id="title">Single image WMS with Proj4js projection example</h4>
<p id="shortdesc">Example of two single image WMS layers.</p>
<div id="docs">
<p>Pixelmap 1:1'000'000 with National Parks overlay using the projection EPSG:21781.</p>
<p>See the <a href="wms-image-custom-proj.js" target="_blank">wms-image-custom-proj.js source</a> to see how this is done.</p>
</div>
<div id="tags">wms, single image, projection</div>
<div id="tags">wms, single image, proj4js, projection</div>
</div>
</div>
@@ -45,8 +45,8 @@
</div>
<script src="jquery.min.js" type="text/javascript"></script>
<script src="http://cdnjs.cloudflare.com/ajax/libs/proj4js/1.1.0/proj4js-compressed.js" type="text/javascript"></script>
<script src="http://cdnjs.cloudflare.com/ajax/libs/proj4js/1.1.0/defs/EPSG21781.js" type="text/javascript"></script>
<script src="http://cdnjs.cloudflare.com/ajax/libs/proj4js/2.2.1/proj4.js" type="text/javascript"></script>
<script src="http://epsg.io/21781.js" type="text/javascript"></script>
<script src="../resources/example-behaviour.js" type="text/javascript"></script>
<script src="loader.js?id=wms-image-custom-proj" type="text/javascript"></script>

19
examples/wms-image-custom-proj.js
View File

@@ -1,15 +1,21 @@
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.Image');
goog.require('ol.proj');
goog.require('ol.source.ImageWMS');
var projection = ol.proj.configureProj4jsProjection({
code: 'EPSG:21781',
extent: [485869.5728, 76443.1884, 837076.5648, 299941.7864]
});
// Transparent Proj4js support: ol.proj.get() creates and returns a projection
// known to Proj4js if it is unknown to OpenLayers, and registers functions to
// transform between all registered projections.
// EPSG:21781 is known to Proj4js because its definition was loaded in the html.
var projection = ol.proj.get('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/.
projection.setExtent([485869.5728, 76443.1884, 837076.5648, 299941.7864]);
var extent = [420000, 30000, 900000, 350000];
var layers = [
@@ -49,12 +55,15 @@ var layers = [
];
var map = new ol.Map({
controls: ol.control.defaults().extend([
new ol.control.ScaleLine()
]),
layers: layers,
renderer: exampleNS.getRendererFromQueryString(),
target: 'map',
view: new ol.View({
projection: projection,
center: [660000, 190000],
center: ol.proj.transform([8.23, 46.86], 'EPSG:4326', 'EPSG:21781'),
extent: extent,
zoom: 2
})