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<p>Hello<br>
</p>
<p>The C++ API defines the following enumeration:</p>
<blockquote>
<pre>osgeo::proj::common::UnitOfMeasure::Type</pre>
</blockquote>
<p>With the following values:</p>
<blockquote>
<pre>UNKNOWN, NONE, ANGULAR, LINEAR, SCALE, TIME, PARAMETRIC
</pre>
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<p>The <tt>METRE</tt> unit for instance is of type <tt>LINEAR</tt>,
which is fine. But I find the following more surprising:</p>
<ul>
<li><tt>METRE_PER_YEAR</tt> declared of type <tt>LINEAR</tt></li>
<li><tt>ARC_SECOND_PER_YEAR</tt> declared of type <tt>ANGULAR</tt></li>
<li><tt>PPM_PER_YEAR</tt> declared of type <tt>SCALE</tt></li>
</ul>
<p>I do not see an API for declaring that above units are rates of
change (speed, angular velocity, etc.) rather than classic linear
or angular units. Shouldn't the API contain something for that?</p>
<p> Martin</p>
<p><br>
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