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leaflet_imgoverlay_world_modified.html
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leaflet_imgoverlay_world_modified.html
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<!DOCTYPE html>
<html>
<head>
<link rel="stylesheet" href="https://unpkg.com/leaflet@1.2.0/dist/leaflet.css">
<script src="https://unpkg.com/leaflet@1.2.0/dist/leaflet-src.js"></script>
<script type="text/javascript" src="./proj4.js"></script>
<script type="text/javascript" src="./proj4leaflet.js"></script>
<script type="text/javascript" src="./L.Graticule.js"></script>
<style>
html,
body {
height: 95%;
}
#map {
width: 1300px;
height: 850px;
background: #e5ffff;
}
</style>
</head>
<body>
<div id="map"></div>
<script>
var lcc_attrs = {
proj4string: "+proj=eqc +lat_0=0 +lat_ts=0 +lon_0=126 +x_0=0 +y_0=0 +ellps=WGS84 +units=m +no_defs",
resolutions: [ 31000, 15733.3333, 10488.8889,
6992.5296, 1655.8025, 1103.8683,
735.9122, 490.6081, 327.0721, 218.0481],
zoom: {
min: 0,
max: 8
}
};
var lcc_crs = new L.Proj.CRS('EPSG:32662', lcc_attrs.proj4string,
{
resolutions: lcc_attrs.resolutions //rss
}
);
var map = L.map('map', {
maxZoom: lcc_attrs.zoom.max, //6,
minZoom: lcc_attrs.zoom.min, //0,
crs: lcc_crs,
continuousWorld: false
}).setView([0, 126], 0);
var canvas = L.canvas();
L.graticule({ interval:20, style:{dashArray:4, color:'#333', weight:1}}).addTo(map);
fnGeoJson();
function fnGeoJson() {
var url = "https://raw.githubusercontent.com/hunter3789/geojson/b1a289dfc2186eb3b7a0d88a8e1211ab601d9d6d/countries.geojson";
var xhr = new XMLHttpRequest();
xhr.open("GET", url, true);
xhr.timeout = 60000;
xhr.overrideMimeType("application/x-www-form-urlencoded; charset=euc-kr");
xhr.onreadystatechange = function () {
if (xhr.readyState != 4 || xhr.status != 200) return;
else {
var json = JSON.parse(xhr.responseText);
var lon_0 = 126;
var lon_split = lon_0 - 180;
var ok;
for (var i=0; i<json.features.length; i++) {
for (var j=0; j<json.features[i].geometry.coordinates.length; j++) {
for (var k=0; k<json.features[i].geometry.coordinates[j].length; k++) {
if (json.features[i].geometry.type == "MultiPolygon") {
ok = 0;
for (var l=0; l<json.features[i].geometry.coordinates[j][k].length; l++) {
if (l == 0) continue;
else if (json.features[i].geometry.coordinates[j][k][l-1][0] >= lon_split && json.features[i].geometry.coordinates[j][k][l][0] < lon_split) {
ok = 1;
break;
}
}
if (ok == 1) {
var n1 = json.features[i].geometry.coordinates[j].length;
json.features[i].geometry.coordinates[j][n1] = [];
for (var l=0; l<json.features[i].geometry.coordinates[j][k].length; l++) {
if (json.features[i].geometry.coordinates[j][k][l][0] >= lon_split) {
var n2 = json.features[i].geometry.coordinates[j][n1].length;
json.features[i].geometry.coordinates[j][n1][n2] = json.features[i].geometry.coordinates[j][k][l];
json.features[i].geometry.coordinates[j][k].splice(l,1);
l--;
}
}
}
if (json.features[i].properties.ADMIN == "Antarctica") {
for (var l=0; l<json.features[i].geometry.coordinates[j][k].length; l++) {
if (json.features[i].geometry.coordinates[j][k][l][1] == -90) {
json.features[i].geometry.coordinates[j][k][l][1] += 0.1;
}
}
}
}
else if (json.features[i].geometry.type == "Polygon") {
if (k==0) continue;
else if (json.features[i].geometry.coordinates[j][k-1][0] >= lon_split && json.features[i].geometry.coordinates[j][k][0] < lon_split) {
ok = 1;
break;
}
}
}
if (ok == 1 && json.features[i].geometry.type == "Polygon") {
var polygon1 = [];
var polygon2 = [];
for (var k=0; k<json.features[i].geometry.coordinates[j].length; k++) {
var n1 = polygon1.length;
var n2 = polygon2.length;
if (json.features[i].geometry.coordinates[j][k][0] >= lon_split) {
polygon1[n1] = json.features[i].geometry.coordinates[j][k];
}
else {
polygon2[n2] = json.features[i].geometry.coordinates[j][k];
}
json.features[i].geometry.coordinates[j].splice(k,1)
k--;
}
json.features[i].geometry.type = "MultiPolygon";
json.features[i].geometry.coordinates[j][0] = polygon1;
json.features[i].geometry.coordinates[j][1] = polygon2;
}
}
}
L.geoJSON(json, {style: {color: "black", fillColor: "#ffffe5", weight: 0.5, fillOpacity: 1}, renderer: canvas})
.bindTooltip(function (layer) {
return layer.feature.properties.ADMIN; //merely sets the tooltip text
}, {opacity: 0.5} //then add your options
).addTo(map);
}
};
xhr.send();
}
</script>
</body>
</html>