<p>The answers you got in StackExchange are correct: your images are in EPSG:4326, which dies not do any vertical stretching. Distance units at the poles converge to zero. Web Mercator, which Google and OSM tiles are in, stretches the latitudes, converging to infinity at the poles.</p>
<p>In early OpenLayers days, it was possible to have tiles stretched to losely match the Google tiles. This is now deprecated, because it adds inaccuracy. Some other mapping clients still do this, so probably this is the reason why things worked in your previous implementations.</p>
<p>Having said that, the recommendation above to use WMS instead of image layers is a good one. GeoServer or MapServer are easy to set up, and can easily be configured to serve and transform georeferenced images.</p>
<p>Regards,<br>
Andreas.</p>
<p><blockquote type="cite">On Apr 29, 2011 5:21 PM, "Ian Turton" <<a href="mailto:ijturton@gmail.com">ijturton@gmail.com</a>> wrote:<br><br><p><font color="#500050">On 29 April 2011 10:31, hayley <<a href="mailto:openlayers@vortex.cx">openlayers@vortex.cx</a>> wrote:<br>
> I've posted the longer story over on ...</font></p>Couldn't you use the WMS layer instead?<br>
<br>
new OpenLayers.Layer.WMS("Weather Radar",<br>
"<a href="http://nowcoast.noaa.gov/wms/com.esri.wms.Esrimap/obs" target="_blank">http://nowcoast.noaa.gov/wms/com.esri.wms.Esrimap/obs</a>?",<br>
{layers:'RAS_RIDGE_NEXRAD',<br>
transparent: true,<br>
format: 'image/png'<br>
},<br>
{isBaseLayer: false,<br>
singleTile: true,<br>
ratio: 1<br>
}<br>
)<br>
<br>
See <a href="http://ian01.geog.psu.edu/geoserver/www/maps/jessica-groups.html" target="_blank">http://ian01.geog.psu.edu/geoserver/www/maps/jessica-groups.html</a><br>
for a full example. Then assuming you set spericalmecator:true it will<br>
line up over Google just fine.<br>
<br>
Ian<br>
<font color="#888888">--<br>
Ian Turton<br>
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</font></blockquote></p>