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<blockquote style="border-left: 2px solid blue; padding-left: 3px;"><pre><tt>daan wrote (about a central latitude that doesn't affect the shape of the <br>
projection): <br>
<br>
> Snyder includes it explicitly in his formulations, referring <br>
> to it as the "latitude of origin" and denoting it as φ₀.<br>
<br>
Yes, now that you mention it. I have never noticed it before, but Snyder <br>
uses phi_0 when the parameter does not affect the projection shape, but <br>
otherwise he uses phi_1 (which he often calls the "latitude of the center of <br>
the projection and origin"), or else phi_1 and phi_2 for two standard parallels. <br>
<br>
This convention is, in fact, stated in his list of symbols on pages viii - ix, <br>
which I hadn't read carefully enough before. <br>
<br>
"Latitude of origin" sounds fine, but I am not too fond of using <br>
many different names for what is called lat_0 in Proj.4. The <br>
EPSG Guidance Note 7.2 has gone too far in this direction, I think. <br>
I like "central latitude" as the only name.<br>
</tt></pre><tt></tt></blockquote>
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<font face="Verdana, Arial, Helvetica, sans-serif" size="2"><span style="font-family: monospace;">Please note also that "Latitude of origin" is the name in the Well Known Text format specification.<br>
E.g.,<br>
</span></font><pre><font face="Verdana, Arial, Helvetica, sans-serif" size="2">PARAMETER["latitude_of_origin",49],<br>
</font></pre><sp an style="font-family: monospace;"><font face="Verdana, Arial, Helvetica, sans-serif" size="2"></font><br>
<font face="Arial, Helvetica, sans-serif">Regards,<br>
— daan Strebe<br>
</font></span><!-- end of AOLMsgPart_0_3341eba4-1bbf-4709-9491-9240d7376435 -->
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