audrey33972_bioInfo, you should read this:
http://groups.google.com/group/Google-Maps-API/web/suggested-posting-guidelines
(the bit about posting a link, and also not hijacking threads)
On Wed, Nov 19, 2008 at 2:21 PM, audrey33972_bioInfo
<[EMAIL PROTECTED]> wrote:
>
> Hello
>
> I have some problems with Google Map. I'm working with Ruby On Rails
> (2.0). I'have written som functions for creating the maps in my web
> application in the application.js file. The points to display are in a
> Javascript Object array. This array is created dynamically in a script
> tag (<script></script>).
> When this array contains about more than 15 points, I don't have any
> markers on my map.
>
> There is the code :
>
> in application.js
>
> var map;
> function addMarker(latitude,longitude,description){
> var marker = new GMarker(new GLatLng(latitude,longitude));
> GEvent.addListener(marker,'click',
> function(){
> marker.openInfoWindowHtml(description);
> }
> );
> return marker;
> }
>
> function setCenterToPoint(longitude,latitude,description){
> map = new GMap2(document.getElementById("map"));
> map.setCenter(new GLatLng(latitude,longitude),10);
>
> map.addControl(new GSmallMapControl());
> map.setMapType(G_SATELLITE_MAP);
> for(i=0;i<markers.length();i++){
>
> var marker = new GMarker(new GLatLng(markers[i].latitude,markers
> [i].longitude));
> GEvent.addListener(marker,'click',function(){
> marker.openInfoWindowHtml(markers[i].html);
> });
> map.addOverlay(marker);
> }
> map.openInfoWindowHtml(new GLatLng
> (latitude,longitude),description);
> }
>
> function init(){
> map = new GMap2(document.getElementById("map"));
> map.addControl(new GSmallMapControl());
> map.setCenter(new GLatLng(34,15),5);
> map.setMapType(G_SATELLITE_MAP);
> var markerManager = new GMarkerManager(map);
> for (i=0; i<markers.length();i++){
> var marker = new GMarker(new GLatLng(markers[i].latitude,markers
> [i].longitude));
> GEvent.addListener(marker,'click',function(){
> marker.openInfoWindowHtml(markers[i].html);
> });
> map.addOverlay(marker);
> }
>
> }
>
> in the script tag :
> <script type="text/javascript">
> var markers = [];
>
> <% @populations.each do|pop| %>
> markers.push({'latitude': <%= pop.geo_coordinate.lat %>,
> 'longitude': <%= pop.geo_coordinate.long %>,
> 'html':'<div>Population : <%= pop.name %><br>Species :
> <%= pop.espece.name %> </div>'});
>
> <% end %>
>
> init();
>
>
> </script>
>
> I have sometimes 306 markers to display. Is it normal (my code is
> wrong) ?
> I also try with the GMarkerManager class, and it's the same result.
> [EMAIL PROTECTED] a écrit :
>> On Nov 18, 3:49�pm, cjackson <[EMAIL PROTECTED]> wrote:
>> > Is there a limit to the number of markers that can appear on a map at
>> > a time? �Thanks for the help!
>>
>> Not by the API. The browser will limit usability after a few hundred,
>> IE is much worse performance than other browsers (so if you expect the
>> general public, be sure to test with IE6).
>>
>> -- Larry
>
> >
>
--
Barry
- www.nearby.org.uk - www.geograph.org.uk -
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