61 lines
1.4 KiB
JavaScript
61 lines
1.4 KiB
JavaScript
goog.require('ol.Map');
|
|
goog.require('ol.View2D');
|
|
goog.require('ol.format.GeoJSON');
|
|
goog.require('ol.layer.Tile');
|
|
goog.require('ol.layer.Vector');
|
|
goog.require('ol.proj');
|
|
goog.require('ol.source.Stamen');
|
|
goog.require('ol.source.TileVector');
|
|
goog.require('ol.style.Stroke');
|
|
goog.require('ol.style.Style');
|
|
goog.require('ol.tilegrid.XYZ');
|
|
|
|
var vectorSource = new ol.source.TileVector({
|
|
format: new ol.format.GeoJSON({
|
|
defaultProjection: 'EPSG:4326'
|
|
}),
|
|
projection: 'EPSG:3857',
|
|
tileGrid: new ol.tilegrid.XYZ({
|
|
maxZoom: 19
|
|
}),
|
|
url: 'http://www.somebits.com:8001/rivers/{z}/{x}/{y}.json',
|
|
z: 11
|
|
});
|
|
|
|
var styleCache = {};
|
|
|
|
var vector = new ol.layer.Vector({
|
|
source: vectorSource,
|
|
style: function(feature, resolution) {
|
|
var strahler = feature.get('strahler');
|
|
var styleArray = styleCache[strahler];
|
|
if (!styleArray) {
|
|
styleArray = [new ol.style.Style({
|
|
stroke: new ol.style.Stroke({
|
|
color: '#29439c',
|
|
width: strahler
|
|
})
|
|
})];
|
|
styleCache[strahler] = styleArray;
|
|
}
|
|
return styleArray;
|
|
}
|
|
});
|
|
|
|
var raster = new ol.layer.Tile({
|
|
source: new ol.source.Stamen({
|
|
layer: 'terrain'
|
|
})
|
|
});
|
|
|
|
var map = new ol.Map({
|
|
layers: [raster, vector],
|
|
renderer: 'canvas',
|
|
target: document.getElementById('map'),
|
|
view: new ol.View2D({
|
|
center: ol.proj.transform([-120.976, 37.958], 'EPSG:4326', 'EPSG:3857'),
|
|
maxZoom: 19,
|
|
zoom: 11
|
|
})
|
|
});
|