Datasets:

boettiger-lab
/

ca-30x30

License:

Dataset card Files Files and versions Community

File size: 27,868 Bytes

3897bd0

<!DOCTYPE html>
            <html>
              <head>
                <title>colored_ca_range_size_rarity.tif</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>
          <!-- Replace URL below with https://maps.googleapis.com/maps/api/js?key=INSERT_YOUR_KEY_HERE -->
          <script src='https://maps.googleapis.com/maps/api/js'></script>
          <script>
          //<![CDATA[

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

                var mapBounds = new google.maps.LatLngBounds(
                    new google.maps.LatLng(31.423689826371422, -125.08104466955334),
                    new google.maps.LatLng(43.470185949106565, -113.80939078827362));
                var mapMinZoom = 1;
                var mapMaxZoom = 10;


                var initialOpacity = 0.75 * 100;
                var map;

                /*
                 * 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();
                }


                // getZoomByBounds(): adapted from https://stackoverflow.com/a/9982152
                /**
                * Returns the zoom level at which the given rectangular region fits in the map view.
                * The zoom level is computed for the currently selected map type.
                * @param {google.maps.Map} map
                * @param {google.maps.LatLngBounds} bounds
                * @return {Number} zoom level
                **/
                function getZoomByBounds(  map, bounds ){
                  var MAX_ZOOM = 21 ;
                  var MIN_ZOOM =  0 ;

                  var ne= map.getProjection().fromLatLngToPoint( bounds.getNorthEast() );
                  var sw= map.getProjection().fromLatLngToPoint( bounds.getSouthWest() );

                  var worldCoordWidth = Math.abs(ne.x-sw.x);
                  var worldCoordHeight = Math.abs(ne.y-sw.y);
                  //Fit padding in pixels
                  var FIT_PAD = 40;
                  for( var zoom = MAX_ZOOM; zoom >= MIN_ZOOM; --zoom ){
                      if( worldCoordWidth*(1<<zoom)+2*FIT_PAD < map.getDiv().offsetWidth &&
                          worldCoordHeight*(1<<zoom)+2*FIT_PAD < map.getDiv().offsetHeight )
                      {
                          if( zoom > mapMaxZoom )
                              zoom = mapMaxZoom;
                          return zoom;
                      }
                  }
                  return 0;
                }

                function fromMercatorPixelToLatLng(pixel, zoom)
                {
                    var CST = 6378137 * Math.PI;
                    var res = 2 * CST / 256 / Math.pow(2, zoom);
                    var X = -CST + pixel.x * res;
                    var Y = CST - pixel.y * res;
                    var lon = X / CST * 180;
                    var lat = Math.atan(Math.sinh(Y / CST * Math.PI)) / Math.PI * 180;
                    return new google.maps.LatLng(lat, lon);
                }


                var OPACITY_MAX_PIXELS = 57; // Width of opacity control image

                function createOpacityControl(map, opacity) {
                    var sliderImageUrl = "https://gdal.org/resources/gdal2tiles/opacity-slider.png";

                    // Create main div to hold the control.
                    var opacityDiv = document.createElement('DIV');
                    var opacityDivMargin = 5;
                    opacityDiv.setAttribute("style", "margin:" + opacityDivMargin + "px;overflow-x:hidden;overflow-y:hidden;background:url(" + sliderImageUrl + ") no-repeat;width:71px;height:21px;cursor:pointer;");

                    // Create knob
                    var opacityKnobDiv = document.createElement('DIV');
                    opacityKnobDiv.setAttribute("style", "padding:0;margin:0;overflow-x:hidden;overflow-y:hidden;background:url(" + sliderImageUrl + ") no-repeat -71px 0;width:14px;height:21px;");
                    opacityDiv.appendChild(opacityKnobDiv);

                    var opacityCtrlKnob = new ExtDraggableObject(opacityKnobDiv, {
                        restrictY: true,
                        container: opacityDiv
                    });

                    google.maps.event.addListener(opacityCtrlKnob, "dragend", function () {
                        setOpacity(opacityCtrlKnob.valueX());
                    });

                    google.maps.event.addDomListener(opacityDiv, "click", function (e) {
                        var left = this.getBoundingClientRect().left;
                        var x = e.pageX - left - opacityDivMargin;
                        opacityCtrlKnob.setValueX(x);
                        setOpacity(x);
                    });

                    map.controls[google.maps.ControlPosition.TOP_RIGHT].push(opacityDiv);

                    // Set initial value
                    var initialValue = OPACITY_MAX_PIXELS / (100 / opacity);
                    opacityCtrlKnob.setValueX(initialValue);
                    setOpacity(initialValue);
                }

                function setOpacity(pixelX) {
                    // Range = 0 to OPACITY_MAX_PIXELS
                    var value = (100 / OPACITY_MAX_PIXELS) * pixelX;
                    if (value < 0) value = 0;
                    if (value == 0) {
                        if (overlay.visible == true) {
                            overlay.hide();
                        }
                    }
                    else {
                        overlay.setOpacity(value);
                        if (overlay.visible == false) {
                            overlay.show();
                        }
                    }
                }

                function createCopyrightControl(map, copyright) {
                    const label = document.createElement("label");
                    label.style.backgroundColor = "#ffffff";
                    label.textContent = copyright;

                    const div = document.createElement("div");
                    div.appendChild(label);

                    map.controls[google.maps.ControlPosition.BOTTOM_RIGHT].push(div);
                }

                
// Beginning of https://github.com/gavinharriss/google-maps-v3-opacity-control/blob/master/ExtDraggableObject.js

/**
 * @name ExtDraggableObject
 * @version 1.0
 * @author Gabriel Schneider
 * @copyright (c) 2009 Gabriel Schneider
 * @fileoverview This sets up a given DOM element to be draggable
 *     around the page.
 */

/*
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

/**
 * Sets up a DOM element to be draggable. The options available
 *     within {@link ExtDraggableObjectOptions} are: top, left, container,
 *     draggingCursor, draggableCursor, intervalX, intervalY,
 *     toleranceX, toleranceY, restrictX, and restrictY.
 * @param {HTMLElement} src The element to make draggable
 * @param {ExtDraggableObjectOptions} [opts] options
 * @constructor
 */
function ExtDraggableObject(src, opt_drag) {
  var me = this;
  var event_ = (window["GEvent"]||google.maps.Event||google.maps.event);
  var opt_drag_=opt_drag||{};
  var draggingCursor_ = opt_drag_.draggingCursor||"default";
  var draggableCursor_ = opt_drag_.draggableCursor||"default";
  var moving_ = false, preventDefault_;
  var currentX_, currentY_, formerY_, formerX_, formerMouseX_, formerMouseY_;
  var top_, left_;
  var mouseDownEvent_, mouseUpEvent_, mouseMoveEvent_;
  var originalX_, originalY_;
  var halfIntervalX_ = Math.round(opt_drag_.intervalX/2);
  var halfIntervalY_ = Math.round(opt_drag_.intervalY/2);
  var target_ = src.setCapture?src:document;

  if (typeof opt_drag_.intervalX !== "number") {
    opt_drag_.intervalX = 1;
  }
  if (typeof opt_drag_.intervalY !== "number") {
    opt_drag_.intervalY = 1;
  }
  if (typeof opt_drag_.toleranceX !== "number") {
    opt_drag_.toleranceX = Infinity;
  }
  if (typeof opt_drag_.toleranceY !== "number") {
    opt_drag_.toleranceY = Infinity;
  }

  mouseDownEvent_ = event_.addDomListener(src, "mousedown", mouseDown_);
  mouseUpEvent_ = event_.addDomListener(target_, "mouseup", mouseUp_);

  setCursor_(false);
  if (opt_drag_.container) {

  }
  src.style.position = "absolute";
  opt_drag_.left = opt_drag_.left||src.offsetLeft;
  opt_drag_.top = opt_drag_.top||src.offsetTop;
  opt_drag_.interval = opt_drag_.interval||1;
  moveTo_(opt_drag_.left, opt_drag_.top, false);

  /**
   * Set the cursor for {@link src} based on whether or not
   *     the element is currently being dragged.
   * @param {Boolean} a Is the element being dragged?
   * @private
   */
  function setCursor_(a) {
    if(a) {
      src.style.cursor = draggingCursor_;
    } else {
      src.style.cursor = draggableCursor_;
    }
  }

  /**
   * Moves the element {@link src} to the given
   *     location.
   * @param {Number} x The left position to move to.
   * @param {Number} y The top position to move to.
   * @param {Boolean} prevent Prevent moving?
   * @private
   */
  function moveTo_(x, y, prevent) {
    var roundedIntervalX_, roundedIntervalY_;
    left_ = Math.round(x);
    top_ = Math.round(y);
    if (opt_drag_.intervalX>1) {
      roundedIntervalX_ = Math.round(left_%opt_drag_.intervalX);
      left_ = (roundedIntervalX_<halfIntervalX_)?(left_-roundedIntervalX_):(left_+(opt_drag_.intervalX-roundedIntervalX_));
    }
    if (opt_drag_.intervalY>1) {
      roundedIntervalY_ = Math.round(top_%opt_drag_.intervalY);
      top_ = (roundedIntervalY_<halfIntervalY_)?(top_-roundedIntervalY_):(top_+(opt_drag_.intervalY-roundedIntervalY_));
    }
    if (opt_drag_.container&&opt_drag_.container.offsetWidth) {
      left_ = Math.max(0,Math.min(left_,opt_drag_.container.offsetWidth-src.offsetWidth));
      top_ = Math.max(0,Math.min(top_,opt_drag_.container.offsetHeight-src.offsetHeight));
    }
    if (typeof currentX_ === "number") {
      if (((left_-currentX_)>opt_drag_.toleranceX||(currentX_-(left_+src.offsetWidth))>opt_drag_.toleranceX)||((top_-currentY_)>opt_drag_.toleranceY||(currentY_-(top_+src.offsetHeight))>opt_drag_.toleranceY)) {
        left_ = originalX_;
        top_ = originalY_;
      }
    }
    if(!opt_drag_.restrictX&&!prevent) {
      src.style.left = left_ + "px";
    }
    if(!opt_drag_.restrictY&&!prevent) {
      src.style.top = top_ + "px";
    }
  }

  /**
   * Handles the mousemove event.
   * @param {event} ev The event data sent by the browser.
   * @private
   */
  function mouseMove_(ev) {
    var e=ev||event;
    currentX_ = formerX_+((e.pageX||(e.clientX+document.body.scrollLeft+document.documentElement.scrollLeft))-formerMouseX_);
    currentY_ = formerY_+((e.pageY||(e.clientY+document.body.scrollTop+document.documentElement.scrollTop))-formerMouseY_);
    formerX_ = currentX_;
    formerY_ = currentY_;
    formerMouseX_ = e.pageX||(e.clientX+document.body.scrollLeft+document.documentElement.scrollLeft);
    formerMouseY_ = e.pageY||(e.clientY+document.body.scrollTop+document.documentElement.scrollTop);
    if (moving_) {
      moveTo_(currentX_,currentY_, preventDefault_);
      event_.trigger(me, "drag", {mouseX: formerMouseX_, mouseY: formerMouseY_, startLeft: originalX_, startTop: originalY_, event:e});
    }
  }

  /**
   * Handles the mousedown event.
   * @param {event} ev The event data sent by the browser.
   * @private
   */
  function mouseDown_(ev) {
    var e=ev||event;
    setCursor_(true);
    event_.trigger(me, "mousedown", e);
    if (src.style.position !== "absolute") {
      src.style.position = "absolute";
      return;
    }
    formerMouseX_ = e.pageX||(e.clientX+document.body.scrollLeft+document.documentElement.scrollLeft);
    formerMouseY_ = e.pageY||(e.clientY+document.body.scrollTop+document.documentElement.scrollTop);
    originalX_ = src.offsetLeft;
    originalY_ = src.offsetTop;
    formerX_ = originalX_;
    formerY_ = originalY_;
    mouseMoveEvent_ = event_.addDomListener(target_, "mousemove", mouseMove_);
    if (src.setCapture) {
      src.setCapture();
    }
    if (e.preventDefault) {
      e.preventDefault();
      e.stopPropagation();
    } else {
      e.cancelBubble=true;
      e.returnValue=false;
    }
    moving_ = true;
    event_.trigger(me, "dragstart", {mouseX: formerMouseX_, mouseY: formerMouseY_, startLeft: originalX_, startTop: originalY_, event:e});
  }

  /**
   * Handles the mouseup event.
   * @param {event} ev The event data sent by the browser.
   * @private
   */
  function mouseUp_(ev) {
    var e=ev||event;
    if (moving_) {
      setCursor_(false);
      event_.removeListener(mouseMoveEvent_);
      if (src.releaseCapture) {
        src.releaseCapture();
      }
      moving_ = false;
      event_.trigger(me, "dragend", {mouseX: formerMouseX_, mouseY: formerMouseY_, startLeft: originalX_, startTop: originalY_, event:e});
    }
    currentX_ = currentY_ = null;
    event_.trigger(me, "mouseup", e);
  }

  /**
   * Move the element {@link src} to the given location.
   * @param {Point} point An object with an x and y property
   *     that represents the location to move to.
   */
  me.moveTo = function(point) {
    moveTo_(point.x, point.y, false);
  };

  /**
   * Move the element {@link src} by the given amount.
   * @param {Size} size An object with an x and y property
   *     that represents distance to move the element.
   */
  me.moveBy = function(size) {
    moveTo_(src.offsetLeft + size.width, src.offsetHeight + size.height, false);
  }

  /**
   * Sets the cursor for the dragging state.
   * @param {String} cursor The name of the cursor to use.
   */
  me.setDraggingCursor = function(cursor) {
    draggingCursor_ = cursor;
    setCursor_(moving_);
  };

  /**
   * Sets the cursor for the draggable state.
   * @param {String} cursor The name of the cursor to use.
   */
  me.setDraggableCursor = function(cursor) {
    draggableCursor_ = cursor;
    setCursor_(moving_);
  };

  /**
   * Returns the current left location.
   * @return {Number}
   */
  me.left = function() {
    return left_;
  };

  /**
   * Returns the current top location.
   * @return {Number}
   */
  me.top = function() {
    return top_;
  };

  /**
   * Returns the number of intervals the element has moved
   *     along the X axis. Useful for scrollbar type
   *     applications.
   * @return {Number}
   */
  me.valueX = function() {
    var i = opt_drag_.intervalX||1;
    return Math.round(left_ / i);
  };

  /**
   * Returns the number of intervals the element has moved
   *     along the Y axis. Useful for scrollbar type
   *     applications.
   * @return {Number}
   */
  me.valueY = function() {
    var i = opt_drag_.intervalY||1;
    return Math.round(top_ / i);
  };

  /**
   * Sets the left position of the draggable object based on
   *     intervalX.
   * @param {Number} value The location to move to.
   */
  me.setValueX = function(value) {
    moveTo_(value * opt_drag_.intervalX, top_, false);
  };

  /**
   * Sets the top position of the draggable object based on
   *     intervalY.
   * @param {Number} value The location to move to.
   */
  me.setValueY = function(value) {
    moveTo_(left_, value * opt_drag_.intervalY, false);
  };

  /**
   * Prevents the default movement behavior of the object.
   *     The object can still be moved by other methods.
   */
  me.preventDefaultMovement = function(prevent) {
    preventDefault_ = prevent;
  };
}
  /**
   * @name ExtDraggableObjectOptions
   * @class This class represents the optional parameter passed into constructor of
   * <code>ExtDraggableObject</code>.
   * @property {Number} [top] Top pixel
   * @property {Number} [left] Left pixel
   * @property {HTMLElement} [container] HTMLElement as container.
   * @property {String} [draggingCursor] Dragging Cursor
   * @property {String} [draggableCursor] Draggable Cursor
   * @property {Number} [intervalX] Interval in X direction
   * @property {Number} [intervalY] Interval in Y direction
   * @property {Number} [toleranceX] Tolerance X in pixel
   * @property {Number} [toleranceY] Tolerance Y in pixel
   * @property {Boolean} [restrictX] Whether to restrict move in X direction
   * @property {Boolean} [restrictY] Whether to restrict move in Y direction
   */

 // End of https://github.com/gavinharriss/google-maps-v3-opacity-control/blob/master/ExtDraggableObject.js


                /*
                 * Main load function:
                 */

                function load() {

                    var options = {
                      center: mapBounds.getCenter(),
                      zoom: mapMaxZoom,
                      mapTypeId: google.maps.MapTypeId.HYBRID,

                      // Add map type control
                      mapTypeControl: true,
                      mapTypeControlOptions: {
                          style: google.maps.MapTypeControlStyle.HORIZONTAL_BAR,
                          position: google.maps.ControlPosition.TOP_LEFT
                      },

                      // Add scale
                      scaleControl: true,
                      scaleControlOptions: {
                          position: google.maps.ControlPosition.BOTTOM_RIGHT
                      }
                    };

                    map = new google.maps.Map( document.getElementById("map"), options);
                    google.maps.event.addListenerOnce(map, "projection_changed", function() {
                       map.setZoom(getZoomByBounds( map, mapBounds ));
                    });

                    
// Beginning of https://github.com/gavinharriss/google-maps-v3-opacity-control/blob/master/CustomTileOverlay.js
// with CustomTileOverlay.prototype.getTileUrl() method customized for gdal2tiles needs.

/*******************************************************************************
Copyright (c) 2010-2012. Gavin Harriss
Site: http://www.gavinharriss.com/
Originally developed for: http://www.topomap.co.nz/
Licences: Creative Commons Attribution 3.0 New Zealand License
http://creativecommons.org/licenses/by/3.0/nz/
******************************************************************************/

CustomTileOverlay = function (map, opacity) {
    this.tileSize = new google.maps.Size(256, 256); // Change to tile size being used

    this.map = map;
    this.opacity = opacity;
    this.tiles = [];

    this.visible = false;
    this.initialized = false;

    this.self = this;
}

CustomTileOverlay.prototype = new google.maps.OverlayView();

CustomTileOverlay.prototype.getTile = function (p, z, ownerDocument) {
    // If tile already exists then use it
    for (var n = 0; n < this.tiles.length; n++) {
        if (this.tiles[n].id == 't_' + p.x + '_' + p.y + '_' + z) {
            return this.tiles[n];
        }
    }

    // If tile doesn't exist then create it
    var tile = ownerDocument.createElement('div');
    var tp = this.getTileUrlCoord(p, z);
    tile.id = 't_' + tp.x + '_' + tp.y + '_' + z
    tile.style.width = this.tileSize.width + 'px';
    tile.style.height = this.tileSize.height + 'px';
    tile.style.backgroundImage = 'url(' + this.getTileUrl(tp, z) + ')';
    tile.style.backgroundRepeat = 'no-repeat';

    if (!this.visible) {
        tile.style.display = 'none';
    }

    this.tiles.push(tile)

    this.setObjectOpacity(tile);

    return tile;
}

// Save memory / speed up the display by deleting tiles out of view
// Essential for use on iOS devices such as iPhone and iPod!
CustomTileOverlay.prototype.deleteHiddenTiles = function (zoom) {
    var bounds = this.map.getBounds();
    var tileNE = this.getTileUrlCoordFromLatLng(bounds.getNorthEast(), zoom);
    var tileSW = this.getTileUrlCoordFromLatLng(bounds.getSouthWest(), zoom);

    var minX = tileSW.x - 1;
    var maxX = tileNE.x + 1;
    var minY = tileSW.y - 1;
    var maxY = tileNE.y + 1;

    var tilesToKeep = [];
    var tilesLength = this.tiles.length;
    for (var i = 0; i < tilesLength; i++) {
        var idParts = this.tiles[i].id.split("_");
        var tileX = Number(idParts[1]);
        var tileY = Number(idParts[2]);
        var tileZ = Number(idParts[3]);
        if ((
                (minX < maxX && (tileX >= minX && tileX <= maxX))
                || (minX > maxX && ((tileX >= minX && tileX <= (Math.pow(2, zoom) - 1)) || (tileX >= 0 && tileX <= maxX))) // Lapped the earth!
            )
            && (tileY >= minY && tileY <= maxY)
            && tileZ == zoom) {
            tilesToKeep.push(this.tiles[i]);
        }
        else {
            delete this.tiles[i];
        }
    }

    this.tiles = tilesToKeep;
};

CustomTileOverlay.prototype.pointToTile = function (point, z) {
    var projection = this.map.getProjection();
    var worldCoordinate = projection.fromLatLngToPoint(point);
    var pixelCoordinate = new google.maps.Point(worldCoordinate.x * Math.pow(2, z), worldCoordinate.y * Math.pow(2, z));
    var tileCoordinate = new google.maps.Point(Math.floor(pixelCoordinate.x / this.tileSize.width), Math.floor(pixelCoordinate.y / this.tileSize.height));
    return tileCoordinate;
}

CustomTileOverlay.prototype.getTileUrlCoordFromLatLng = function (latlng, zoom) {
    return this.getTileUrlCoord(this.pointToTile(latlng, zoom), zoom)
}

CustomTileOverlay.prototype.getTileUrlCoord = function (coord, zoom) {
    var tileRange = 1 << zoom;
    var y = tileRange - coord.y - 1;
    var x = coord.x;
    if (x < 0 || x >= tileRange) {
        x = (x % tileRange + tileRange) % tileRange;
    }
    return new google.maps.Point(x, y);
}

// Modified for gdal2tiles needs
CustomTileOverlay.prototype.getTileUrl = function (tile, zoom) {

      if ((zoom < mapMinZoom) || (zoom > mapMaxZoom)) {
          return "https://gdal.org/resources/gdal2tiles/none.png";
      }
      var ymax = 1 << zoom;
      var y = ymax - tile.y -1;
      var tileBounds = new google.maps.LatLngBounds(
          fromMercatorPixelToLatLng( new google.maps.Point( (tile.x)*256, (y+1)*256 ) , zoom ),
          fromMercatorPixelToLatLng( new google.maps.Point( (tile.x+1)*256, (y)*256 ) , zoom )
      );
      if (mapBounds.intersects(tileBounds)) {
          return zoom+"/"+tile.x+"/"+tile.y+".png";
      } else {
          return "https://gdal.org/resources/gdal2tiles/none.png";
      }

}

CustomTileOverlay.prototype.initialize = function () {
    if (this.initialized) {
        return;
    }
    var self = this.self;
    this.map.overlayMapTypes.insertAt(0, self);
    this.initialized = true;
}

CustomTileOverlay.prototype.hide = function () {
    this.visible = false;

    var tileCount = this.tiles.length;
    for (var n = 0; n < tileCount; n++) {
        this.tiles[n].style.display = 'none';
    }
}

CustomTileOverlay.prototype.show = function () {
    this.initialize();
    this.visible = true;
    var tileCount = this.tiles.length;
    for (var n = 0; n < tileCount; n++) {
        this.tiles[n].style.display = '';
    }
}

CustomTileOverlay.prototype.releaseTile = function (tile) {
    tile = null;
}

CustomTileOverlay.prototype.setOpacity = function (op) {
    this.opacity = op;

    var tileCount = this.tiles.length;
    for (var n = 0; n < tileCount; n++) {
        this.setObjectOpacity(this.tiles[n]);
    }
}

CustomTileOverlay.prototype.setObjectOpacity = function (obj) {
    if (this.opacity > 0) {
        if (typeof (obj.style.filter) == 'string') { obj.style.filter = 'alpha(opacity:' + this.opacity + ')'; }
        if (typeof (obj.style.KHTMLOpacity) == 'string') { obj.style.KHTMLOpacity = this.opacity / 100; }
        if (typeof (obj.style.MozOpacity) == 'string') { obj.style.MozOpacity = this.opacity / 100; }
        if (typeof (obj.style.opacity) == 'string') { obj.style.opacity = this.opacity / 100; }
    }
}

// End of https://github.com/gavinharriss/google-maps-v3-opacity-control/blob/master/CustomTileOverlay.js


                    overlay = new CustomTileOverlay(map, initialOpacity);
                    overlay.show();

                    google.maps.event.addListener(map, 'tilesloaded', function () {
                        overlay.deleteHiddenTiles(map.getZoom());
                    });

                    // Add opacity control and set initial value
                    createOpacityControl(map, initialOpacity);

                    var copyright = "";
                    if( copyright != "" ) {
                        createCopyrightControl(map, copyright);
                    }

                    resize();
                }

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

                //]]>
                </script>
              </head>
              <body onload="load()">
                  <div id="header"><h1>colored_ca_range_size_rarity.tif</h1></div>
                  <div id="subheader">Generated by <a href="https://gdal.org/programs/gdal2tiles.html">GDAL2Tiles</a>, Copyright &copy; 2008 <a href="http://www.klokan.cz/">Klokan Petr Pridal</a>,  <a href="https://gdal.org">GDAL</a> &amp; <a href="http://www.osgeo.org/">OSGeo</a> <a href="http://code.google.com/soc/">GSoC</a>
            <!-- PLEASE, LET THIS NOTE ABOUT AUTHOR AND PROJECT SOMEWHERE ON YOUR WEBSITE, OR AT LEAST IN THE COMMENT IN HTML. THANK YOU -->
                  </div>
                   <div id="map"></div>
              </body>
            </html>