[Talk-in] How to Server Any default Image in Empty Tiles

Tue Jun 29 20:09:16 BST 2010

Hello everyone,
 I have set up a OSM tile server which is at:

http://202.164.53.116/~parveen

i have rendered some area upto zoom level 19,
and other area is less  than 19 zoom level,
so that area is showing no images found.
I want to put there a default image, of data is not available or any other
like it.
Is there any need to change the code to do it.
 The code i used is given below:
<html>  <head> <title>OpenLayers Demo</title>  <style type="text/css">
html, body, #basicMap {width: 100%; height:
100%; margin: 0; } </style>  <script src="
http://202.164.53.116/~hsrai/OSM/OpenLayers.js"></script>  <script> function
init() { map = new OpenLayers.Map("basicMap");// var mapnik = new
OpenLayers.Layer.OSM(); // map.addLayer(mapnik); var newLayer = new
OpenLayers.Layer.OSM("New Layer", "
http://202.164.53.116/~hsrai/OSM/tiles/${z}/${x}/${y}.png", {numZoomLevels:
20}); map.addLayer(newLayer); map.setCenter(new
OpenLayers.LonLat(75.8588,30.904) // Center of the map .transform( new
OpenLayers.Projection("EPSG:4326"), // transform from WGS 1984 new
OpenLayers.Projection("EPSG:900913") // to Spherical Mercator Projection ),
10 // Zoom level ); } </script> <script type="text/javascript">  function
openMapKey() { updateMapKey();  openSidebar({ title: "Map key", onclose:
closeMapKey });  map.events.register("zoomend", map, updateMapKey);
map.events.register("changelayer",
map, updateMapKey); }  function closeMapKey()
{map.events.unregister("zoomend", map,
updateMapKey);map.events.unregister("changelayer", map, updateMapKey);
} function updateMapKey() { var layer = map.baseLayer.keyid; var zoom =
map.getZoom(); new Ajax.Updater('sidebar_content', '/key',
{asynchronous:true, evalScripts:true, method:'get', parameters:'layer=' +
layer + '&zoom=' + zoom}) }</script>  <script type="text/javascript">
<!--function startSearch() { updateSidebar("Search
Results", ""); }  function describeLocation() { var args =
getArgs($("viewanchor").href); new Ajax.Request('/geocoder/description',
{asynchronous:true, evalScripts:true,
onLoading:function(request){startSearch()}, parameters:'lat=' + args['lat']
+ '&lon=' + args['lon'] + '&zoom=' + args['zoom']}) } function
setSearchViewbox() { var extent = getMapExtent();  $("minlon").value =
extent.left; $("minlat").value = extent.bottom; $("maxlon").value =
extent.right; $("maxlat").value = extent.top;  }  // --></script>
</head> <body
onload="init();">  <div id="basicMap"></div>  </body> </html>

-- 
With Kind Regards
Parveen Arora
www.osmpunjab.co.cc
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