Re: [maptiler] Migration from Google Maps api v2 to api v3

Klokan Petr Přidal

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Dec 3, 2012, 6:13:13 AM12/3/12

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Dear Sasha,

just use this code:

http://www.maptiler.org/example-usgs-drg-grand-canyon-gtiff/v3.html

Petr

On Sun, Dec 2, 2012 at 5:07 PM, Sasha <olek...@yakubovsky.com> wrote:

Hey, i'm still trying to migrate from v2 to v3 googlemaps.html example. No luck. Who knows, what should I change in sample code? thanks:

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">

<html xmlns="http://www.w3.org/1999/xhtml" xmlns:v="urn:schemas-microsoft-com:vml">

<head>
<title>ternopil.png</title>
<meta http-equiv="content-type" content="text/html; charset=utf-8"/>

<meta http-equiv='imagetoolbar' content='no'/>
<style type="text/css"> v\:* {behavior:url(#default#VML);}

html, body { overflow: hidden; padding: 0; height: 100%; width: 100%; font-family: 'Lucida Grande',Geneva,Arial,Verdana,sans-serif; }
body { margin: 10px; background: #fff; }

h1 { margin: 0; padding: 6px; border:0; font-size: 20pt; }
#header { height: 43px; padding: 0; background-color: #eee; border: 1px solid #888; }

#subheader { height: 12px; text-align: right; font-size: 10px; color: #555;}
#map { height: 95%; border: 1px solid #888; }

</style>
<script src='http://maps.google.com/maps?file=api&v=2&key=INSERT_YOUR_KEY_HERE' type='text/javascript'></script>

<script type="text/javascript">
//<![CDATA[

/*

* Constants for given map
* TODO: read it from tilemapresource.xml
*/

var mapBounds = new GLatLngBounds(new GLatLng(48.3147789163, 24.439), new GLatLng(50.1558, 26.2179283796));
var mapMinZoom = 2;

var mapMaxZoom = 8;

var opacity = 0.75;
var map;

var ge;
var hybridOverlay;

/*

* Create a Custom Opacity GControl
* http://www.maptiler.org/google-maps-overlay-opacity-control/

*/

var CTransparencyLENGTH = 58;
// maximum width that the knob can move (slide width minus knob width)

function CTransparencyControl( overlay ) {
this.overlay = overlay;
this.opacity = overlay.getTileLayer().getOpacity();

}
CTransparencyControl.prototype = new GControl();

// This function positions the slider to match the specified opacity

CTransparencyControl.prototype.setSlider = function(pos) {
var left = Math.round((CTransparencyLENGTH*pos));

this.slide.left = left;
this.knob.style.left = left+"px";
this.knob.style.top = "0px";

}

// This function reads the slider and sets the overlay opacity level
CTransparencyControl.prototype.setOpacity = function() {

// set the global variable
opacity = this.slide.left/CTransparencyLENGTH;
this.map.clearOverlays();

this.map.addOverlay(this.overlay, { zPriority: 0 });
if (this.map.getCurrentMapType() == G_HYBRID_MAP) {

this.map.addOverlay(hybridOverlay);
}
}

// This gets called by the API when addControl(new CTransparencyControl())
CTransparencyControl.prototype.initialize = function(map) {

var that=this;
this.map = map;

// Is this MSIE, if so we need to use AlphaImageLoader

var agent = navigator.userAgent.toLowerCase();
if ((agent.indexOf("msie") > -1) && (agent.indexOf("opera") < 1)){this.ie = true} else {this.ie = false}

// create the background graphic as a <div> containing an image
var container = document.createElement("div");

container.style.width="70px";
container.style.height="21px";

// Handle transparent PNG files in MSIE
if (this.ie) {

var loader = "filter:progid:DXImageTransform.Microsoft.AlphaImageLoader(src='http://www.maptiler.org/img/opacity-slider.png', sizingMethod='crop');";

container.innerHTML = '<div style="height:21px; width:70px; ' +loader+ '" ></div>';
} else {

container.innerHTML = '<div style="height:21px; width:70px; background-image: url(http://www.maptiler.org/img/opacity-slider.png)" ></div>';

}

// create the knob as a GDraggableObject
// Handle transparent PNG files in MSIE

if (this.ie) {
var loader = "progid:DXImageTransform.Microsoft.AlphaImageLoader(src='http://www.maptiler.org/img/opacity-slider.png', sizingMethod='crop');";

this.knob = document.createElement("div");
this.knob.style.height="21px";

this.knob.style.width="13px";
this.knob.style.overflow="hidden";
this.knob_img = document.createElement("div");

this.knob_img.style.height="21px";
this.knob_img.style.width="83px";
this.knob_img.style.filter=loader;
this.knob_img.style.position="relative";
this.knob_img.style.left="-70px";

this.knob.appendChild(this.knob_img);
} else {
this.knob = document.createElement("div");

this.knob.style.height="21px";
this.knob.style.width="13px";
this.knob.style.backgroundImage="url(http://www.maptiler.org/img/opacity-slider.png)";

this.knob.style.backgroundPosition="-70px 0px";
}
container.appendChild(this.knob);

this.slide=new GDraggableObject(this.knob, {container:container});
this.slide.setDraggableCursor('pointer');

this.slide.setDraggingCursor('pointer');
this.container = container;

// attach the control to the map
map.getContainer().appendChild(container);

// init slider

this.setSlider(this.opacity);

// Listen for the slider being moved and set the opacity

GEvent.addListener(this.slide, "dragend", function() {that.setOpacity()});
//GEvent.addListener(this.container, "click", function( x, y ) { alert(x, y) });

return container;
}

// Set the default position for the control

CTransparencyControl.prototype.getDefaultPosition = function() {
return new GControlPosition(G_ANCHOR_TOP_RIGHT, new GSize(7, 47));

}

/*
* Full-screen Window Resize

*/

function getWindowHeight() {
if (self.innerHeight) return self.innerHeight;

if (document.documentElement && document.documentElement.clientHeight)
return document.documentElement.clientHeight;

if (document.body) return document.body.clientHeight;
return 0;
}

function getWindowWidth() {
if (self.innerWidth) return self.innerWidth;
if (document.documentElement && document.documentElement.clientWidth)

return document.documentElement.clientWidth;
if (document.body) return document.body.clientWidth;

return 0;
}

function resize() {

var map = document.getElementById("map");
var header = document.getElementById("header");

var subheader = document.getElementById("subheader");
map.style.height = (getWindowHeight()-80) + "px";

map.style.width = (getWindowWidth()-20) + "px";
header.style.width = (getWindowWidth()-20) + "px";

subheader.style.width = (getWindowWidth()-20) + "px";
// map.checkResize();
}

/*
* Main load function:
*/

function load() {

if (GBrowserIsCompatible()) {

// Bug in the Google Maps: Copyright for Overlay is not correctly displayed

var gcr = GMapType.prototype.getCopyrights;
GMapType.prototype.getCopyrights = function(bounds,zoom) {

return ["©"].concat(gcr.call(this,bounds,zoom));
}

map = new GMap2( document.getElementById("map"), { backgroundColor: '#fff' } );

map.addMapType(G_PHYSICAL_MAP);

map.setMapType(G_PHYSICAL_MAP);

map.setCenter( mapBounds.getCenter(), map.getBoundsZoomLevel( mapBounds ));

hybridOverlay = new GTileLayerOverlay( G_HYBRID_MAP.getTileLayers()[1] );
GEvent.addListener(map, "maptypechanged", function() {

if (map.getCurrentMapType() == G_HYBRID_MAP) {
map.addOverlay(hybridOverlay);
} else {
map.removeOverlay(hybridOverlay);
}

} );

var tilelayer = new GTileLayer(GCopyrightCollection(''), mapMinZoom, mapMaxZoom);

var mercator = new GMercatorProjection(mapMaxZoom+1);
tilelayer.getTileUrl = function(tile,zoom) {

if ((zoom < mapMinZoom) || (zoom > mapMaxZoom)) {
return "http://www.maptiler.org/img/none.png";

}
var ymax = 1 << zoom;
var y = ymax - tile.y -1;

var tileBounds = new GLatLngBounds(
mercator.fromPixelToLatLng( new GPoint( (tile.x)*256, (tile.y+1)*256 ) , zoom ),

mercator.fromPixelToLatLng( new GPoint( (tile.x+1)*256, (tile.y)*256 ) , zoom )
);

if (mapBounds.intersects(tileBounds)) {
return zoom+"/"+tile.x+"/"+y+".png";

} else {
return "http://www.maptiler.org/img/none.png";

}
}
// IE 7-: support for PNG alpha channel

// Unfortunately, the opacity for whole overlay is then not changeable, either or...
tilelayer.isPng = function() { return true;};

tilelayer.getOpacity = function() { return opacity; }

overlay = new GTileLayerOverlay( tilelayer );

map.addOverlay(overlay);

map.addControl(new GLargeMapControl3D());
map.addControl(new GHierarchicalMapTypeControl());

map.addControl(new CTransparencyControl( overlay ));

map.enableContinuousZoom();

map.enableScrollWheelZoom();

map.setMapType(G_HYBRID_MAP);
}

resize();
}

onresize=function(){ resize(); };

//]]>
</script>
</head>

<body onload="load()">
<div id="header"><h1>ternopil.png</h1></div>

<div id="subheader">Generated by <a href="http://www.maptiler.org/">MapTiler</a>/<a href="http://www.klokan.cz/projects/gdal2tiles/">GDAL2Tiles</a>, Copyright © 2008 <a href="http://www.klokan.cz/">Klokan Petr Pridal</a>, <a href="http://www.gdal.org/">GDAL</a> & <a href="http://www.osgeo.org/">OSGeo</a> <a href="http://code.google.com/soc/">GSoC</a>


</div>

<div id="map"></div>
</body>
</html>

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Gavin

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Dec 3, 2012, 5:16:16 PM12/3/12

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You should be able to use the code here with very little tweaking: http://www.gavinharriss.com/code/opacity-control

Sasha

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Dec 12, 2012, 6:27:59 AM12/12/12

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Dear Petr,

you posted a map. could you please post code. thank's

Gavin

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Dec 12, 2012, 5:03:49 PM12/12/12

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Just use the browser to dig in to the code. No need to post. e.g. in Firefox right click on page and select "View page source" menu option.

Sasha

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Dec 12, 2012, 7:12:27 PM12/12/12

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Thanks Gavin. It was easier than I thought

Grzegorz Jendrzej

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May 22, 2013, 1:44:26 AM5/22/13

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Hello

I have also qestion about v3 google maps version.

In v2 version in egzample
http://www.maptiler.org/example-usgs-drg-grand-canyon-gtiff/

we have oportunity to switch into earth mode

but in v3 version there is no those option we can only swith into mode

map
map terrrain
satelitte
sateliite with labels

and what with earth mode?
is it still posible to se 3d view?

Ofcourse I have instaled google earth so it is not problem with drivers.

I would like to see reanswer.

Best Regards

1.png

Petr Pridal

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May 23, 2013, 7:29:25 AM5/23/13

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Google deprecated this in the Maps API V3. There are unofficial solutions or you have to code it separately in the Earth API.

Petr

Peak

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Jun 24, 2013, 8:57:47 PM6/24/13

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You are free to use the code in the following webpage. It supports API v3, as well as an added jscript switching multiple tile overlays, with the MapTiler slider.

http://www.maptest.net/mashups/BP_MapBeta.html

Cheers
Brett Marraccini
PeakGIS

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