<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
</head>
<body text="#000099" bgcolor="#ffffff">
<p><font size="-1"><font face="Verdana">Hello!</font></font></p>
<p><font size="-1"><font face="Verdana">I am using an OpenLayers map
with OpenStreetMap and Google map base layers. Currently I've
get it working by setting map's projection to EPSG:900913,
map's display projection to EPSG:4326, setting an option
sphericalMercator=true for Google maps layer's and
transforming OpenLayer.LonLat and OpenLayer.Geometry.Point
from EPSG:4326 to </font></font><font size="-1"><font
face="Verdana">EPSG:900913 every time I add one to the map.
I've picked this up from various examples, so I'm not sure if
this is the right approach in my situation. Is it?<br>
</font></font></p>
<p><font size="-1"><font face="Verdana">If it is the right approach,
I have several questions.</font></font></p>
<p><font size="-1"><font face="Verdana">1) Why should I set
sphericalMercator=true for Google maps, but not for
OpenStreetMap? Can the Google maps layers be also used with
the option being false, and can OSM be used with the option
true?</font></font></p>
<p><font size="-1"><font face="Verdana">2) What's the point of
setting the map's projection to EPSG:900913 and map's display
projection to EPSG:4326, if I still have to transform the
coordinates every time my script interacts with the map
(adding objects on specific coordinates)?</font></font></p>
<p><font size="-1"><font face="Verdana">3) Do I need the
transformation at all, if I use only maps with the Spherical
Mercator projection (Google maps and OSM are all supposed to
be using Spherical Mercator)? Shouldn't everything already be
in that projection?<br>
</font></font></p>
<p><font size="-1"><font face="Verdana">Thank you!<br>
Janis<br>
<br>
</font></font></p>
</body>
</html>