[OpenLayers-Users] Re: Lat Long as units for zoomify layer

[Albert Ang]

> Dear all,
>
> I like to seek advice on using the zoomify layer. I'll using a satellite
> image and I know the lat long of this image. I like to ask the following
> questions :
>
> 1) Is it possible to set latitude / longitude (degree decimals) as unit for
> the zoomify layer instead of pixels?
> 2) is it possible to have a small overview window for zoomify layer?
> 3) how to code it so that the map zoom to a particular lat / long?
>
> Below are my code snipplet.
>
> Thank you very much and best regards.
>
> Albert Ang
>
> <script type="text/javascript">
>
>         var zoomify_width = 4645;
>   var zoomify_height = 4915;
>   var zoomify_url = "SPOT5_20110223/";
>
>         var map, zoomify;
>
>         function init(){
>         /* First we initialize the zoomify pyramid (to get number of tiers)
> */
>          var zoomify = new OpenLayers.Layer.Zoomify( "Zoomify",
> zoomify_url,
>       new OpenLayers.Size( zoomify_width, zoomify_height ) );
>
>         /* Map with raster coordinates (pixels) from Zoomify image */
>          var options = {
>              controls: [],
>              maxExtent: new OpenLayers.Bounds(0, 0, zoomify_width,
> zoomify_height),
>              maxResolution: Math.pow(2, zoomify.numberOfTiers-1 ),
>              numZoomLevels: zoomify.numberOfTiers,
>              units: 'pixels'
>          };
>
>          map = new OpenLayers.Map("map", options);
>          map.addLayer(zoomify);
>
>          map.addControl(new OpenLayers.Control.MousePosition());
>          map.addControl(new OpenLayers.Control.PanZoomBar());
>          map.addControl(new OpenLayers.Control.MouseDefaults());
>          map.addControl(new OpenLayers.Control.KeyboardDefaults());
>
>             map.setBaseLayer(zoomify);
>          map.zoomToMaxExtent();
>         };
>
> </script>
>
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