johnolulu.github.io/map.html at main · johnolulu/johnolulu.github.io · GitHub

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

<head>

<title>Atlas of Hawai&#699;i &middot; Palapala&#699;&#257;ina o Hawai&#699;i</title>

<link rel="shortcut icon" href="icons/favicon_ah_navy.ico" />
<link href="css/main.css" rel="stylesheet" type="text/css">

<style type="text/css">

* {
  margin: 0;
  padding: 0;
}

a img, iframe {
  border: 0;
}

body {
  font-family: Arial, Helvetica, Verdana, sans-serif;
  font-size: 85%;
}

form, fieldset {
  border: 0;
}

table {
  border-collapse: collapse;
  border: 0;
}

#homelogo {
  position: absolute;
  top: 5px;
  left: 5px;
  border: 1px solid #0F1B28;
}

#header {
  position: absolute;
  top: 5px;
  left: 332px;
  right: 5px;
  height: 26px;
  padding: 6px 5px 0px 5px;
  /*text-align: center;
  font-size: 22px;*/
  border: 1px solid #AAAAAA;
}

#zoomToText {
  position: absolute;
  top: 6px;
  left: 332px;
  right: 5px;
  height: 26px;
  padding: 6px 5px 0px 5px;
}

#title {
  position: absolute;
  top: 5px;
  left: 42px;
  right: 5px;
  height: 26px;
  width: 275px;
  padding: 6px 5px 0px 5px;
  border: 1px solid #AAAAAA;
  /*text-align: center;*/
  /*font-size: 22px;*/
  /*font-weight: bolder;*/
  /*font-family: Arial, Verdana, Arial, sans-serif;*/
}

#addressBox {
  position: absolute;
  top: 5px;
  right: 5px;
  height: 26px;
  padding: 7px 5px 0px 5px;
}

#map {
  position: absolute;
  top: 42px;
  left: 5px;
  right: 210px;
  bottom: 5px;
  border: 1px solid #979797;
}

#dragZoomInfo {
  position: absolute;
  top: 47px;
  left: 13px;
}

#sidebar {
  position: absolute;
  top: 42px;
  right: 5px;
  width: 190px;
  bottom: 77px;
  padding: 5px 5px 5px 5px;
  /*background-color: #CCCCCC; */
  border: 1px solid #777777;
  overflow: auto;
  /*font-family: "Times New Roman", Times, serif;*/
  /*font-size: 14px;*/
  /*font-style: normal;*/
}

#sidebar * {
  margin-bottom: 5px;
}

#sidebar select {
  margin-top: 5px;
}

#toolBox {
  position: absolute;
  right: 5px;
  width: 200px;
  bottom: 55px;
  height: 17px;
  border: 1px solid #777777;
  overflow: auto;
  text-align: center;
  font-size: small;
}

#mapInfo {
  position: absolute;
  right: 5px;
  width: 200px;
  bottom: 5px;
  height: 45px;
  border: 1px solid #777777;
  overflow: auto;
  font-size: small;
}

#boundingBox {
  position: absolute;
  bottom: 25px;
  text-align: center;
  width: 200px;
  /*font-family: "Times New Roman", Times, serif;*/
  /*font-size: 15px;*/
}

#cursorPosition {
  position: absolute;
  bottom: 3px;
  left: 5px;
  right: 5px;
  z-index: 2;
  background-color: #FFCC00; /*#FF9900; */
  /*background-color: #FFFFFF;*/
  /*color: #000000;*/
  text-align: center;
  /*font-size: small;*/
  /*font-size: 15px;*/
  color: #0F1B28;
}

#max_display_text {
  left: 4px;
  top: 20px;
}

#max_display_selector {
  width: 150px;
}

#welcomeMessage {
  background: #FFCC00;
  color: #000000;
  border: 1px dashed #FFFFFF;
  padding: 15px;
  margin: 15px;
}

#welcomeMessage a:link {
  color: #006699;
  text-decoration: none;
}

#welcomeMessage a:visited {
  color: #006699;
  text-decoration: none;
}

#welcomeMessage a:hover {
  color: #990033;
  text-decoration: none;
}

#welcomeMessage a:active {
  color: #990033;
  text-decoration: none;
}

#welcomeMessage p {
  margin: 0px 0px 8px 0px;
}

/* NOTE: .labelstyle used by planimeter.js and ruler.js for style of ELabel in elabel.js: */
.labelstyle {
  color: #000000;
  background-color: #FFFFFF;
  font-weight: bold;
}

.niceborder {
  border: 0px solid #000000;
  margin: 3px;
  padding-top: 2px;
  padding-right: 2px;
  padding-bottom: 4px;
  padding-left: 2px;
}

</style>

<!--
This supplies the Google Maps API Key for John Maurer's homepage:
-->

<script src="http://maps.google.com/maps?file=api&amp;v=2&amp;key=ABQIAAAAKfKzHtniMnzunHIMxSVkPxQaLZwQxbrHWeSEzQ5oyC7vtQh23xSu92Qem5E5uIg-Elfocps16Em-8A" type="text/javascript"></script>

<!--
Add JavaScript code for Key DragZoom Google Map utility library.
Source: http://gmaps-utility-library.googlecode.com/svn/trunk/keydragzoom/
Key Drag Zoom v1.0
Authors: Nianwei Liu [nianwei at gmail dot com] & Gary Little [gary at luxcentral dot com]
NOTE: Put in document.write so loads after above Google Maps API.
-->

<script>document.write( '<script src="scripts/keyDragZoom.js"><\/script>' );</script>

<!--
Add JavaScript code to display a latitude/longitude graticule on the map.
Source: http://www.bdcc.co.uk/Gmaps/BdccGmapBits.htm
Author: Bill Chadwick
-->

<script src="scripts/latLonGraticule.js" type="text/javascript"></script>

<!--
Add JavaScript code to display circular rings showing distance from a point
on the map.
Source: http://www.bdcc.co.uk/Gmaps/BdccGmapBits.htm
Author: Bill Chadwick
-->

<script src="scripts/rangeRings.js" type="text/javascript"></script>

<!--
Add JavaScript code to display ELabels, which allows you to place text labels
or images or any other HTML elements on the map and have them move with the map,
like marker and polyline overlays.
Source: http://econym.org.uk/gmap/elabel.htm
Author: Mike Williams
-->

<script src="scripts/elabel.js" type="text/javascript"></script>

<!--
Add JavaScript code to create or remove a dynamic ruler on the map.
Source: http://koti.mbnet.fi/ojalesa/exam/ruler.html
Author: Esa Ilmari
NOTE: Requires above elabel.js for ELabels.
-->

<script src="scripts/ruler.js" type="text/javascript"></script>

<!--
Add JavaScript code to create or remove a dynamic area calculator (a.k.a.
planimeter) on the map.
Source:
Author:
Modified By: John Maurer (2009).
NOTE: Requires above elabel.js for ELabels.
-->

<script src="scripts/planimeter.js" type="text/javascript"></script>

<!--
Add JavaScript code for iBox inline pop-up window.
Source: http://www.ibegin.com/labs/ibox/
Author: iBegin
-->

<script src="scripts/ibox/ibox.js" type="text/javascript"></script>

<!--
Add JavaScript code for jQuery cluetip inline pop-up window.
Source:
Author:
-->

<script src="scripts/jquery/cluetip/lib/jquery-1.3.2.js" type="text/javascript"></script>
<!-- Need these?
<script src="scripts/jquery/cluetip/lib/jquery.hoverIntent.js" type="text/javascript"></script>
<script src="scripts/jquery/cluetip/old/jquery.dimensions.js" type="text/javascript"></script>
-->
<script src="scripts/jquery/cluetip/jquery.cluetip.js" type="text/javascript"></script>
<script type="text/javascript">
$(document).ready(function() {
  $('a.clue').cluetip({activation: 'click', attribute: 'href', closePosition: 'title', closeText: '<img src="icons/cross.png" alt="close window" title="close window"/>', sticky: true, width: 300});
});
</script>
<link rel="stylesheet" href="scripts/jquery/cluetip/jquery.cluetip.css" type="text/css" />

<!--
User-defined JavaScript functions:
-->

<script type="text/javascript">

/* Pre-load image icons: */

var ahLogoGold = new Image( 32, 32 );
    ahLogoGold.src = "logos/ah_icon_simple_gold_32x32.png";

var ahLogoOlive = new Image( 32, 32 );
    ahLogoOlive.src = "logos/ah_icon_simple_olive_32x32.png";

var nextImage = new Image( 19, 18 );
    nextImage.src = "icons/next.png";

var nextHighlightImage = new Image( 19, 18 );
    nextHighlightImage.src = "icons/nextHighlight.png";

var pauseImage = new Image( 13, 18 );
    pauseImage.src = "icons/pause.png";

var pauseHighlightImage = new Image( 13, 18 );
    pauseHighlightImage.src = "icons/pauseHighlight.png";

var playImage = new Image( 13, 18 );
    playImage.src = "icons/play.png";

var playHighlightImage = new Image( 13, 18 );
    playHighlightImage.src = "icons/playHighlight.png";

var prevImage = new Image( 19, 18 );
    prevImage.src = "icons/prev.png";

var prevHighlightImage = new Image( 19, 18 );
    prevHighlightImage.src = "icons/prevHighlight.png";

/* Global variables: */

// For storing Google Map:

var map;

// For storing Google Map address geocoder:

var geocoder;

// For storing ID of setInterval() function when looping through locations:

var loopIntervalID;

// For storing number of milliseconds to loop in the above setInterval():

var loopIntervalMilliseconds = 5000;

// Global variables to hold IDs for various tools overlays:

var latLonGraticuleID  = 0;
var rangeRingsID       = 0;

// For storing whether a marker has been single or double clicked:

var markerSingleClicked = false;
var markerDoubleClicked = false;
var clickTimeoutTest = 0;

// For storing KML/KMZ overlays...

var nwsOverlayTest;
var nws_1hour_precip;
var nws_composite_reflectivity;
var nws_longrange_reflectivity;
var nws_shortrange_reflectivity;
var nws_storm_relativemotion;
var nws_storm_totalprecip;
var nws_velocity;
var nws_warnings;

/*
This JavaScript function controls the Google Map that is displayed.
Author: John Maurer
*/

function loadGoogleMap() {

  // Only create a Google Map if Google determines the browser is compatible:

  if ( GBrowserIsCompatible() ) {

    // Start a new Google Map and Geocoder:

    map      = new GMap2( document.getElementById( 'map' ) );
    geocoder = new GClientGeocoder();

    // Set starting map center, bounds, and zoom level; to
    // fit the main islands of Hawaii:

    var center    = new GLatLng( 20.5453, -157.4780 );
    var sw        = new GLatLng( 18.5941, -160.4498 );
    var ne        = new GLatLng( 22.4364, -154.5996 );
    var bounds    = new GLatLngBounds( sw, ne );
    var zoomLevel = map.getBoundsZoomLevel( bounds );

    map.setCenter( center, zoomLevel );

    // Set various features of the map:

    map.setMapType( G_HYBRID_MAP );

    //map.setMapType( G_SATELLITE_MAP );

    map.addMapType( G_PHYSICAL_MAP );
    map.addMapType( G_SATELLITE_3D_MAP );

    map.addControl( new GLargeMapControl3D(), new GControlPosition( G_ANCHOR_TOP_LEFT, new GSize( 7, 24 ) ) );
    map.addControl( new GMapTypeControl() );
    map.addControl( new GScaleControl() );
    //map.addControl( new GNavLabelControl(), new GControlPosition( G_ANCHOR_BOTTOM_RIGHT ) );

    // Add draggable zoom box from keyDragZoom.js:

    map.enableKeyDragZoom( {
         key: "shift",
         boxStyle: { border: "medium solid yellow", backgroundColor: "transparent", opacity: 1 },
         paneStyle: { backgroundColor: "black", opacity: 0.1 }
      }
    );

    map.enableDoubleClickZoom();
    map.enableContinuousZoom();
    map.enableScrollWheelZoom();

    // Add an overview map:
    //var overviewMap = new GOverviewMapControl()
    //map.addControl( overviewMap );
    //overviewMap.hide();

    // Display the lat/long of the current cursor location when the
    // mouse is over the map image:

    GEvent.addListener( map, "mousemove", function( point ) {

        // First, strip the latitude and longitude of the cursor location
        // down to a reasonable number of decimals (Google supplies many by default!):

        var numDecimals = 4;

        // Get latitude and longitude and convert to strings:

        var cursorLat    = point.lat();
        var cursorLatStr = cursorLat.toString();
        var cursorLng    = point.lng();
        var cursorLngStr = cursorLng.toString();

        // Get the string index of the decimal point for each:

        var decimalPointIndexLat = cursorLatStr.indexOf( '.' );
        var decimalPointIndexLng = cursorLngStr.indexOf( '.' );

        // Get the substring that goes up to the number of decimals specified
        // in numDecimals:

        var cursorLatSubstr = cursorLatStr.substr( 0, decimalPointIndexLat + 1 + numDecimals );
        var cursorLngSubstr = cursorLngStr.substr( 0, decimalPointIndexLng + 1 + numDecimals );

        // Define and display the string that will be displayed using these two
        // n-digit numbers:

        var pointNumDecimals = cursorLatSubstr + ', ' + cursorLngSubstr;

        document.getElementById( "cursorPosition" ).innerHTML = '<b>cursor:</b> ' + pointNumDecimals;
      }
    );

    // When the mouse is not over the map image, display nothing:

    GEvent.addListener( map, "mouseout", function() {
        document.getElementById( "cursorPosition" ).innerHTML = '';
      }
    );

    // Define various KML overlays:

    // Give them a useless random parameter so that Google does not cache results; this will
    // allow content that get refreshed to be refreshed in our map:

    var date = new Date();
    var junkParameter = ( date.getYear() + 1900 ).toString() + date.getMonth().toString() + date.getDate().toString() + date.getHours().toString() + date.getMinutes().toString() + date.getSeconds().toString();

    // Doppler radar overlays:

    nws_1hour_precip            = new GGeoXml( "http://www2.hawaii.edu/~jmaurer/kml/doppler/nws_1hour_precip.kml?" + junkParameter );
    nws_composite_reflectivity  = new GGeoXml( "http://www2.hawaii.edu/~jmaurer/kml/doppler/nws_composite_reflectivity.kml?" + junkParameter );
    nws_longrange_reflectivity  = new GGeoXml( "http://www2.hawaii.edu/~jmaurer/kml/doppler/nws_longrange_reflectivity.kml?" + junkParameter );
    nws_shortrange_reflectivity = new GGeoXml( "http://www2.hawaii.edu/~jmaurer/kml/doppler/nws_shortrange_reflectivity.kml?" + junkParameter );
    nws_storm_relativemotion    = new GGeoXml( "http://www2.hawaii.edu/~jmaurer/kml/doppler/nws_storm_relativemotion.kml?" + junkParameter );
    nws_storm_totalprecip       = new GGeoXml( "http://www2.hawaii.edu/~jmaurer/kml/doppler/nws_storm_totalprecip.kml?" + junkParameter );
    nws_velocity                = new GGeoXml( "http://www2.hawaii.edu/~jmaurer/kml/doppler/nws_velocity.kml?" + junkParameter );
    nws_warnings                = new GGeoXml( "http://www2.hawaii.edu/~jmaurer/kml/doppler/nws_warnings.kml?" + junkParameter );

  } // if browser compatible

  // If the browser is not compatible, display a static image instead:

  else {
    alert( "You're browser is not compatible with Google Maps." );
  }

} // end function loadGoogleMap()

/*
This JavaScript function prints a message with the current map dimensions,
including the map center, zoom level, and map bounding box:
NOTE: map needs to be predefined (see loadGoogleMap() above).
Author: John Maurer
*/

function showMapDimensions() {

  // First, strip latitudes and longitudes down to a reasonable
  // number of decimals (Google supplies many by default!):

  var numDecimals = 4;

  // Get map center:

  var centerStr = map.getCenter().toString();

  // Split map center into latitude and longitude:

  centerStr.match( /^\((.+), (.+)\)$/ );

  var centerLat = RegExp.$1;
  var centerLon = RegExp.$2;

  // Reduce number of digits in map center lat/long:

  var centerLatSubstr = centerLat.substr( 0, centerLat.indexOf( '.' ) + 1 + numDecimals );
  var centerLonSubstr = centerLon.substr( 0, centerLon.indexOf( '.' ) + 1 + numDecimals );

  // Get map zoom level:

  var zoomLevel = map.getZoom().toString();

  // Get map bounding box:

  var bboxStr = map.getBounds().toString();

  // Split bounding box into minlat, minlon, maxlat, and maxlon:

  bboxStr.match( /^\(\((.+), (.+)\), \((.+), (.+)\)\)$/ );

  var minLat = RegExp.$1;
  var minLon = RegExp.$2;
  var maxLat = RegExp.$3;
  var maxLon = RegExp.$4;

  // Reduce the number of digits in each of the above:

  var minLatSubstr = minLat.substr( 0, minLat.indexOf( '.' ) + 1 + numDecimals );
  var minLonSubstr = minLon.substr( 0, minLon.indexOf( '.' ) + 1 + numDecimals );
  var maxLatSubstr = maxLat.substr( 0, maxLat.indexOf( '.' ) + 1 + numDecimals );
  var maxLonSubstr = maxLon.substr( 0, maxLon.indexOf( '.' ) + 1 + numDecimals );

  // Get map size (in number of pixels):

  var sizeStr = map.getSize().toString();

  // Split map size into width and height:

  sizeStr.match( /^\((.+), (.+)\)$/ );

  var width  = RegExp.$1;
  var height = RegExp.$2;

  // Print the above dimensions into a separate pop-up window:

  var popup = window.open( '', 'popup', 'resizable=yes, width=650, height=200, menubar=no, toolbar=no, location=no, scrollbars=no, left=400, top=400' );

  popup.document.write(
      '<html>'
    + '<head>'
    + '<title>Current Map Dimensions</title>'
    + '<link href="css/subpages.css" rel="stylesheet" type="text/css">'
    + '<style>'
    + 'h3 { font-family: Verdana, Tahoma, sans-serif; font-size: 105%; font-weight: bold; color: #003366; line-height: normal; padding-top: 6px; padding-bottom: 3px; padding-left: 0px; margin: 0px; }'
    + '</style>'
    + '</head>'
    + '<body style="padding: 0px 0px 0px 12px;">'
    + '<h3>Current map dimensions:</h3>'
    + '<ul>'
    + '<li>Center (Lat, Long): ' + centerLatSubstr + ', ' + centerLonSubstr
    + '<br/>'
    + '<li>Zoom Level: ' + zoomLevel
    + '<br/>'
    + '<li>Bounds (Min Lat, Min Long, Max Lat, Max Long): ' + minLatSubstr + ', ' + minLonSubstr + ', ' + maxLatSubstr + ', ' + maxLonSubstr
    + '<br/>'
    + '<li>Size (Width, Height): ' + width + ' px, ' + height + ' px'
    + '<br/>'
    + '<li>Map Projection: Spherical Mercator'
    + '</ul>'
    + '<a href="javascript:window.close();" class="NavLinksNSIDC" style="cursor: pointer; cursor: hand;"><img src="icons/cross_maroon_8x8.gif" border=0 align="absmiddle" width="8" height="8"/> <font color="#990033" style="Arial, Helvetica, sans-serif;">close window</font></a>'
    + '</body>'
    + '</html>'
  );

} // function showMapDimensions()

/*
This JavaScript function puts a marker and info window at the submitted address.
NOTE: map and geocoder need to be predefined (see loadGoogleMap() above).
Author: Google Maps API Documentation
*/

function showAddress( address ) {

  if ( geocoder ) {

    geocoder.getLatLng(
      address,
      function( point ) {

        // If the address is not found, display an alert message:

        if ( !point ) {
          alert( address + " not found" );
        }

        // Otherwise, display a marker and info window at the address:

        else {

          map.setCenter( point );

          var markerOptions = { title:address };
          var marker = new GMarker( point, markerOptions );

          var markerHtml;

          markerHtml  = "<p class='googleMapMarkerText'>" + address + "</p>";
          markerHtml += "<br/><p><font class='SmallTextGray'><i>NOTE: Double-click marker to remove it...</i></font></p>";

          map.addOverlay( marker );
          marker.openInfoWindowHtml( markerHtml );

          // Make the info window appear when the marker is clicked, and
          // make the marker disappear when it is double-clicked. Google
          // Maps doesn't work to give a marker both a click and a double-
          // click listener, so we're going to listen for a double-click
          // by using a 250 millisecond setTimeout():

          GEvent.addListener( marker, "click", function() {
              if ( markerSingleClicked ) {
                markerDoubleClicked = true;
              }
              else {
                markerSingleClicked = true;
                markerDoubleClicked = false;
                setTimeout( makeCaller( markerActionAddress, marker, point, markerHtml ), 250 );
              }
            }
          );
        }
      } // function()

    ); // geocoder()

  } // if geocoder

  // Set the default message and style into address display box:

  var addressBox = window.document.atlasForm.address;

  addressBox.value           = "Enter an address or coordinates here...";
  addressBox.style.color     = "gray";
  addressBox.style.fontStyle = "italic";

} // function showAddress()

/*
This function displays an info pop-up window on a marker if it is single-clicked
or it removes the marker if it is double-clicked. A setTimeout() must be used
to toggle global variables that determine if there is a single or double-click.
Author: John Maurer
*/

function markerActionAddress ( marker, point, markerHtml ) {

  if ( markerDoubleClicked ) {
    map.removeOverlay( marker );
  }
  else {
    map.openInfoWindowHtml( point, markerHtml );
  }

  // Reset the clicked/double-clicked status:

  markerSingleClicked = false;
}

/*
This fuction turns the first argument into a function with up to 10 optional
arguments. Used in event listeners like GEvent.addListener() and setTimeout() so
they properly handle arguments.
Author: Acme Laboratories (http://acme.com/javascript/Utils.jsm)
*/

function makeCaller ( func, arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8, arg9, arg10 ) {
  return function () {
    func( arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8, arg9, arg10 );
  };
}

/*
This JavaScript function jumps to a particular location from a list of options.
It chooses an appopriate zoom level for each location.
NOTE: map needs to be predefined (see loadGoogleMap() above).
Author: John Maurer
*/

function jumpTo( location ) {

  var center;
  var zoomLevel;
  var sw;
  var ne;
  var bounds;

  // Home location:

  if ( location == "Hawai'i (State)" ) {
    center = new GLatLng( 19.5869, -155.4675 );
    sw     = new GLatLng( 17.7225, -161.9494 );
    ne     = new GLatLng( 23.1757, -152.5836 );
  }

  // Each of the main Hawaiian islands:

  else if ( location == "Hawai'i (Big Island)" ) {
    center = new GLatLng( 19.5895, -155.5128 );
    sw     = new GLatLng( 18.9023, -156.6842 );
    ne     = new GLatLng( 20.2737, -154.3428 );
  }
  else if ( location == "Kaho'olawe" ) {
    center = new GLatLng( 20.5476, -156.6066 );
    sw     = new GLatLng( 20.4850, -156.7103 );
    ne     = new GLatLng( 20.6226, -156.5220 );
  }
  else if ( location == "Kaua'i" ) {
    center = new GLatLng( 22.0506, -159.4960 );
    sw     = new GLatLng( 21.7862, -159.8497 );
    ne     = new GLatLng( 22.3310, -159.1905 );
  }
  else if ( location == "Lana'i" ) {
    center = new GLatLng( 20.8312, -156.9348 );
    sw     = new GLatLng( 20.6970, -157.1020 );
    ne     = new GLatLng( 20.9716, -156.7724 );
  }
  else if ( location == "Maui" ) {
    center = new GLatLng( 20.7920, -156.3327 );
    sw     = new GLatLng( 20.5241, -156.7172 );
    ne     = new GLatLng( 21.0736, -155.9193 );
  }
  else if ( location == "Moloka'i" ) {
    center = new GLatLng( 21.1280, -157.0159 );
    sw     = new GLatLng( 20.9934, -157.3743 );
    ne     = new GLatLng( 21.2573, -156.665 );
  }
  else if ( location == "Ni'ihau" ) {
    center = new GLatLng( 21.8965, -160.1408 );
    sw     = new GLatLng( 21.7652, -160.2726 );
    ne     = new GLatLng( 22.0219, -160.0254 );
  }
  else if ( location == "O'ahu" ) {
    center = new GLatLng( 21.4524, -157.9648 );
    sw     = new GLatLng( 21.1914, -158.3164 );
    ne     = new GLatLng( 21.7505, -157.6023 );
  }

  // The Northwestern (Leeward) Islands:

  else if ( location == "Northwestern" ) {
    center = new GLatLng( 24.5271, -168.6621 );
    sw     = new GLatLng( 17.9996, 177.6708 );
    ne     = new GLatLng( 31.5972, -154.0722 );
  }

  // Compute the zoomLevel that will fit the location's bounding box:

  bounds    = new GLatLngBounds( sw, ne );
  zoomLevel = map.getBoundsZoomLevel( bounds );

  // Set map to specified center point and zoom level:

  map.setCenter( center, zoomLevel );
}

/*
This JavaScript function fills in the appropriate select options for
zoom-to locations based on the selected category.
Author: John Maurer
*/

function setJumpToOptions ( category ) {

  var form = window.document.atlasForm;

  form.jumpToIsland.style.display = "none";
  form.jumpToBeach.style.display = "none";
  form.jumpToStatePark.style.display = "none";

  if ( category == "Island" ) {
    form.jumpToIsland.style.display = "inline";
    form.jumpToIsland.selectedIndex = 0;
  }
  else if ( category == "Beach" ) {
    form.jumpToBeach.style.display = "inline";
    form.jumpToBeach.selectedIndex = 0;
  }
  else if ( category == "State Park" ) {
    form.jumpToStatePark.style.display = "inline";
    form.jumpToStatePark.selectedIndex = 0;
  }
}

/*
This JavaScript function increments either "forward" or "backward" in the
select list for the specified category.
Author: John Maurer
*/

function incrementCategory ( category, direction ) {

  var form = window.document.atlasForm;

  // Determine which select list to increment:

  var jumpToList;

  if ( category == "Island" ) {
    jumpToList = form.jumpToIsland;
  }
  else if ( category == "Beach" ) {
    jumpToList = form.jumpToBeach;
  }
  else if ( category == "State Park" ) {
    jumpToList = form.jumpToStatePark;
  }

  // Get currently selected location and total length of this list:

  var currentIndex = jumpToList.selectedIndex;
  var length       = jumpToList.length;
  var lastIndex    = length - 1;

  // Determine the incremented index in this list; if value is
  // null, skip another increment until you find a non-null value:
  // this allows us to have select options that provide other
  // event handler functions like displaying or removing markers:

  var incIndex = currentIndex;
  var incValue = '';

  do {
    if ( direction == "forward" ) {
      if ( incIndex == lastIndex ) {
        incIndex = 1;
      }
      else {
        incIndex++;
      }
    }
    else {
      if ( incIndex == 1 ) {
        incIndex = lastIndex;
      }
      else {
        incIndex--;
      }
    }

    // Get the value associated with the incremented index:

    incValue = jumpToList[ incIndex ].value;
  }
  while ( !incValue );

  // Set and jump to the next location value:

  jumpToList.value = incValue;
  jumpTo( incValue );
}

/*
This JavaScript function increments the loop speed for looping through
location lists when the play button has been pressed either "faster" or
"slower"; this either increases or decreases the number of milliseconds
in the global loopIntervalMilliseconds variable.
Author: John Maurer
*/

function incrementSpeed ( direction ) {

  var minIntervalMilliseconds =  3000;
  var maxIntervalMilliseconds = 10000;

  if ( direction == "faster" ) {
    if ( loopIntervalMilliseconds > minIntervalMilliseconds ) {
      loopIntervalMilliseconds -= 1000;
    }
  }
  else {
    if ( loopIntervalMilliseconds < maxIntervalMilliseconds ) {
      loopIntervalMilliseconds += 1000;
    }
  }

  // Update the speed display with the new interval:

  var loopIntervalSeconds = ( loopIntervalMilliseconds / 1000 ).toString();

  window.document.getElementById( 'displaySpeed' ).innerHTML = "<font color='gold'><b>" + loopIntervalSeconds + "</b></font>";

  // Stop the current loop and restart another with the new speed:

  clearInterval( loopIntervalID );
  loopIntervalID = setInterval( "incrementCategory( window.document.atlasForm.jumpToCategory.value, 'forward' )", loopIntervalMilliseconds );
}

/*
This function removes all map overlays using the values in the
given "category" select list.
Author: John Maurer
*/

function removeOverlays ( category ) {

  for ( var i = 0; i < category.length; i++ ) {
    // eval() is used to turn option value into reference to global variable
    // of the same name holding that Google Maps API GGeoXml object:

    map.removeOverlay( eval( category.options[ i ].value ) );
  }
}

/*
This function adds the specified overlay with the specified refresh rate.
Since the Google Map API does not currently seem to honor the refresh rate
specified in the KML, this is a workaround to achieve it, since data that
are frequently updated (doppler radar, etc.) need it in order to stay current.
Before adding the overlay each time it is removed and then added back.
Author: John Maurer
*/

function addOverlayWithRefresh( overlay, refreshRateMilliseconds ) {

  alert( overlay.value );
  refreshIntervalID = setInterval( "map.removeOverlay( overlay ); map.addOverlay( overlay );", refreshRateMilliseconds );
}

</script>

</head>

<body onLoad="loadGoogleMap();" onUnload="GUnload();">

<form name="atlasForm">

<div id="homelogo"><a rel="ibox&width=500&height=263" href="mapwelcome.html" title="About the Atlas of Hawai&#699;i..."><img src='logos/ah_icon_simple_gold_32x32.png' width="32" height="32" onMouseOver="this.src='logos/ah_icon_simple_olive_32x32.png'" onMouseOut="this.src='logos/ah_icon_simple_gold_32x32.png'" /></a></div>
<div id="title"><b>Atlas of Hawai&#699;i <font color="gray">&middot;</font> Palapala&#699;&#257;ina o Hawai&#699;i</b></div>
<div id="zoomToText"><b>Zoom to:</b></div>
<div id="header"><!--&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;-->
  <select style="margin: 0px 0px 0px 65px;" name="jumpToCategory" onChange="this.blur(); setJumpToOptions( this.value );">
    <option value="" disabled>Select a category...</option>
    <option value="Beach">Beach</option>
    <option value="Island" selected>Island</option>
    <option value="State Park">State Park</option>
  </select>
  <select id="jumpToIsland" name="jumpToIsland" onChange="this.blur(); jumpTo( this.value );">