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<div class="moz-cite-prefix">Good Morning to you! <br>
<br>
So if I understand the entire question correctly - Yes that is how
I would do it (but I'm not a geographer, Mathematician, and/or
Geodetic person) . You set the custom projection under Settings
-> custom CRS in the QGIS menus (at the top). The projection
(once set) will show up as a choice for your data for display or
reprojection. Just give it a name and don't forget to save it. <br>
<br>
Randy
<pre class="moz-signature" cols="72">-----------------
Randal Hale, GISP
North River Geographic Systems, Inc
<a class="moz-txt-link-freetext" href="http://www.northrivergeographic.com">http://www.northrivergeographic.com</a>
423.653.3611 <a class="moz-txt-link-abbreviated" href="mailto:rjhale@northrivergeographic.com">rjhale@northrivergeographic.com</a>
<a class="moz-txt-link-rfc2396E" href="mailto:rjhale@northrivergeographic.com"><mailto:rjhale@northrivergeographic.com></a>
twitter:rjhale
<a class="moz-txt-link-freetext" href="http://about.me/rjhale">http://about.me/rjhale</a>
</pre>
On 07/10/2013 10:02 PM, Leo Kris Palao wrote:<br>
</div>
<blockquote
cite="mid:CAMktv+0i9kYjo16o7JMJhQXMDtanzcKWjF5tfbnB-=L7nJ=a9A@mail.gmail.com"
type="cite">
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<div>
<div>Dear QGIS Community,<br>
<br>
</div>
Good Day!<br>
<br>
</div>
I am currently working with a project that covers the whole
country. My problem is if I want to compute for perimeter, area,
and when using terrain analysis modules, the spatial datasets
should be projected. But the country covers two UTM zones and I
want to use a much broader scale projection. I want to use the
Equal Area Cylindrical > <i>NSIDC EASE-Grid Global
Projection</i> but I want to set the central meridian to be in
the middle of my country of interest. In this case, I can
minimize the distortions in my country of interest, right? I do
not know what parameter should I change to do it. Below is the
code for the abovementioned projection.<br>
<div><br>
</div>
<div>+proj=cea +lon_0=0 +lat_ts=30 +x_0=0 +y_0=0 +a=6371228
+b=6371228 +units=m +no_defs<br>
</div>
<div><br>
</div>
<div style="">Thanks in advance.</div>
<div style=""><br>
</div>
<div style="">-Leo</div>
</div>
<br>
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</pre>
</blockquote>
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