workshop ol raster layer

by Francesco Boccacci

HTML

<script src="https://cdnjs.cloudflare.com/ajax/libs/proj4js/2.5.0/proj4.js"></script>
<script src="https://epsg.io/3003.js"></script>
<link rel="stylesheet" href="https://cdn.jsdelivr.net/gh/openlayers/openlayers.github.io@master/en/v6.4.3/css/ol.css">
<script src="https://cdn.jsdelivr.net/gh/openlayers/openlayers.github.io@master/en/v6.4.3/build/ol.js"></script>
<body>
  <div id="map" class="map"></div>
</body>

CSS

html, body {
  height: 100%;
  width: 100%;
  margin: 0;
}

.map {
  height: 100%;
  width: 100%;
}

JavaScript

ol.proj.proj4.register(proj4);
const firenze_gbw = [1681450.785672498, 4848967.319261061];
const firenze_gmerc = ol.proj.transform(firenze_gbw, "EPSG:3003", "EPSG:3857");
const map = new ol.Map({
	layers: [
  	new ol.layer.Tile({
    	source: new ol.source.OSM()
   })
  ],
  target: 'map',
  view: new ol.View({
  	center: firenze_gmerc,
  	zoom: 15
 	})
});
//const  ortofoto = new ol.layer.Tile({
const ortofoto = new ol.layer.Image({
 	//maxResolution: 2, // risoluzione massima di visualizzazione
  //minResolution: 0,
	//source: new ol.source.TileWMS({
  source: new ol.source.ImageWMS({
  	url: "http://www502.regione.toscana.it/ows_ofc/com.rt.wms.RTmap/wms?map=owsofc&map_resolution=91&",
    	params: {
      	layers: ["rt_ofc.5k16.32bit"],
        opacity: 1
      }
  })
});

map.addLayer(ortofoto);
map.getView().setZoom(17);
//ortofoto.setOpacity(0.5);