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index.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name='viewport' content='width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no' />
<title>Indian Peninsula Elevation and Rivers</title>
<!-- Leaflet -->
<link rel="stylesheet" href="https://unpkg.com/leaflet@0.7.5/dist/leaflet.css" />
<script src="https://unpkg.com/leaflet@0.7.5/dist/leaflet.js"></script>
<style>
body { margin:0; padding:0; }
body, table, tr, td, th, div, h1, h2, input { font-family: "Calibri", "Trebuchet MS", "Ubuntu", Serif; font-size: 11pt; }
#map { position:absolute; top:0; bottom:0; width:100%;
background: #fff !important;
} /* full size */
.ctl {
padding: 2px 10px 2px 10px;
background: white;
background: rgba(255,255,255,0.9);
box-shadow: 0 0 15px rgba(0,0,0,0.2);
border-radius: 5px;
text-align: center;
}
.title {
font-size: 18pt;
font-weight: bold;
}
.src {
font-size: 10pt;
}
</style>
</head>
<body>
<div id="map"></div>
<script>
L.Map.mergeOptions({
// @option almostOver: Boolean = true
// Set it to false to disable this plugin
almostOver: true,
// @option almostDistance: Number = 25
// Tolerance in pixels
almostDistance: 25, // pixels
// @option almostSamplingPeriod: Number = 50
// To reduce the 'mousemove' event frequency. In milliseconds
almostSamplingPeriod: 50, // ms
// @option almostOnMouseMove Boolean = true
// Set it to false to disable track 'mousemove' events and improve performance
// if AlmostOver is only need for 'click' events.
almostOnMouseMove: true,
});
L.Handler.AlmostOver = L.Handler.extend({
includes: L.Evented || L.Mixin.Events,
initialize: function (map) {
this._map = map;
this._layers = [];
this._previous = null;
this._marker = null;
this._buffer = 0;
// Reduce 'mousemove' event frequency
this.__mouseMoveSampling = (function () {
var timer = new Date();
return function (e) {
var date = new Date(),
filtered = (date - timer) < this._map.options.almostSamplingPeriod;
if (filtered || this._layers.length === 0) {
return; // Ignore movement
}
timer = date;
this._map.fire('mousemovesample', {latlng: e.latlng});
};
})();
},
addHooks: function () {
if (this._map.options.almostOnMouseMove) {
this._map.on('mousemove', this.__mouseMoveSampling, this);
this._map.on('mousemovesample', this._onMouseMove, this);
}
this._map.on('click dblclick', this._onMouseClick, this);
var map = this._map;
function computeBuffer() {
this._buffer = this._map.layerPointToLatLng([0, 0]).lat -
this._map.layerPointToLatLng([this._map.options.almostDistance,
this._map.options.almostDistance]).lat;
}
this._map.on('viewreset zoomend', computeBuffer, this);
this._map.whenReady(computeBuffer, this);
},
removeHooks: function () {
this._map.off('mousemovesample');
this._map.off('mousemove', this.__mouseMoveSampling, this);
this._map.off('click dblclick', this._onMouseClick, this);
},
addLayer: function (layer) {
if (typeof layer.eachLayer == 'function') {
layer.eachLayer(function (l) {
this.addLayer(l);
}, this);
}
else {
if (typeof this.indexLayer == 'function') {
this.indexLayer(layer);
}
this._layers.push(layer);
}
},
removeLayer: function (layer) {
if (typeof layer.eachLayer == 'function') {
layer.eachLayer(function (l) {
this.removeLayer(l);
}, this);
}
else {
if (typeof this.unindexLayer == 'function') {
this.unindexLayer(layer);
}
var index = this._layers.indexOf(layer);
if (0 <= index) {
this._layers.splice(index, 1);
}
}
this._previous = null;
},
getClosest: function (latlng) {
var snapfunc = L.GeometryUtil.closestLayerSnap,
distance = this._map.options.almostDistance;
var snaplist = [];
if (typeof this.searchBuffer == 'function') {
snaplist = this.searchBuffer(latlng, this._buffer);
}
else {
snaplist = this._layers;
}
return snapfunc(this._map, snaplist, latlng, distance, false);
},
_onMouseMove: function (e) {
var closest = this.getClosest(e.latlng);
if (closest) {
if (!this._previous) {
this._map.fire('almost:over', {layer: closest.layer,
latlng: closest.latlng});
}
else if (L.stamp(this._previous.layer) != L.stamp(closest.layer)) {
this._map.fire('almost:out', {layer: this._previous.layer});
this._map.fire('almost:over', {layer: closest.layer,
latlng: closest.latlng});
}
this._map.fire('almost:move', {layer: closest.layer,
latlng: closest.latlng});
}
else {
if (this._previous) {
this._map.fire('almost:out', {layer: this._previous.layer});
}
}
this._previous = closest;
},
_onMouseClick: function (e) {
var closest = this.getClosest(e.latlng);
if (closest) {
this._map.fire('almost:' + e.type, {layer: closest.layer,
latlng: closest.latlng});
}
},
});
if (L.LayerIndexMixin !== undefined) {
L.Handler.AlmostOver.include(L.LayerIndexMixin);
}
L.Map.addInitHook('addHandler', 'almostOver', L.Handler.AlmostOver);
</script>
<script>
/* **** Leaflet **** */
// Base layers
// .. OpenStreetMap
var osm = L.tileLayer('http://{s}.tile.osm.org/{z}/{x}/{y}.png', {attribution: '© <a href="http://osm.org/copyright">OpenStreetMap</a> contributors', minZoom: 4, maxZoom: 12});
// .. CartoDB Positron
var cartodb = L.tileLayer('http://{s}.basemaps.cartocdn.com/light_all/{z}/{x}/{y}.png', {attribution: '© <a href="http://www.openstreetmap.org/copyright">OpenStreetMap</a> contributors, © <a href="http://cartodb.com/attributions">CartoDB</a>', minZoom: 4, maxZoom: 12});
// .. OSM Toner
var toner = L.tileLayer('http://{s}.tile.stamen.com/toner/{z}/{x}/{y}.png', {attribution: 'Map tiles by <a href="http://stamen.com">Stamen Design</a>, under <a href="http://creativecommons.org/licenses/by/3.0">CC BY 3.0</a>. Data by <a href="http://openstreetmap.org">OpenStreetMap</a>, under <a href="http://www.openstreetmap.org/copyright">ODbL</a>.', minZoom: 4, maxZoom: 12});
// .. White background
var white = L.tileLayer("data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAQAAAAEAAQMAAABmvDolAAAAA1BMVEX///+nxBvIAAAAH0lEQVQYGe3BAQ0AAADCIPunfg43YAAAAAAAAAAA5wIhAAAB9aK9BAAAAABJRU5ErkJggg==", {minZoom: 4, maxZoom: 12});
// Overlay layers (TMS)
var lyr = L.tileLayer('./{z}/{x}/{y}.png', {tms: 1, opacity: 1, attribution: "@iamkrishradha", minZoom: 4, maxZoom: 12});
// Map
var map = L.map('map', {
center: [16.00002996449892, 78.49996223964762],
zoom: 4,
minZoom: 4,
maxZoom: 12,
layers: []
});
lyr.addTo(map);
//var basemaps = {"OpenStreetMap": osm, "CartoDB Positron": cartodb, "Stamen Toner": toner, "Without background": white}
var overlaymaps = {"Elevation": lyr}
var basemaps={}
// Title
var title = L.control();
title.onAdd = function(map) {
this._div = L.DomUtil.create('div', 'ctl title');
this.update();
return this._div;
};
title.update = function(props) {
this._div.innerHTML = "Indian Peninsula Elevation and Rivers";
};
title.addTo(map);
// Note
var src = 'For educational Purposes only. Made with Open data';
var title = L.control({position: 'bottomleft'});
title.onAdd = function(map) {
this._div = L.DomUtil.create('div', 'ctl src');
this.update();
return this._div;
};
title.update = function(props) {
this._div.innerHTML = src;
};
title.addTo(map);
// Add base layers
ctrl= L.control.layers(basemaps, overlaymaps, {collapsed: false,position: 'topleft'}).addTo(map);
fetch("./worldmap.json")
.then(function(response) {
return response.json();
})
.then(function(data) {
geojsonLayer=L.geoJson(data).addTo(map);
geojsonLayer.setStyle({
fillColor: 'blue',
fillOpacity: 0,
weight: 2,
color:'black'
});
ctrl.addOverlay(geojsonLayer,'World Outline');
});
fetch("./southrivers-simple.json")
.then(function(response) {
return response.json();
})
.then(function(data) {
geojsonLayer1=L.geoJson(data,{
onEachFeature: function(feature, layer) {
layer.bindPopup(
'<h1>'+feature.properties.rivname+'</h1>',//+'<hr> <p> Basin :'+feature.properties.ba_name+'</p><br/><p> Origin : '+feature.properties.origin+' </p>'
//{closeOnClick: false, autoClose: false}
);
}
})
geojsonLayer1.setStyle({
fillColor: 'blue',
fillOpacity: 0,
weight: 6,
color:'blue'
});
geojsonLayer1.addTo(map);
map.almostOver.addLayer(geojsonLayer1);
map.on('almost:over', function(e) {
var layer = e.layer;
if (layer.openPopup) {
layer.fire('click', e);
}
});
// geojsonLayer1.eachLayer(function(layer){
// layer.openPopup();
// });
ctrl.addOverlay(geojsonLayer1,'Rivers');
});
// Fit to overlay bounds (SW and NE points with (lat, lon))
map.fitBounds([[7.999921040108962, 89.00006336818413], [24.000138888888884, 67.9998611111111]]);
</script>
</body>
</html>