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Hi all,<br>
<br>
A draft tutorial has been completed on use of projections in
MapServer: <a
href="https://geographika.github.io/tutorial/quickstart/projections.html">https://geographika.github.io/tutorial/quickstart/projections.html</a><br>
Comments and feedback welcome. This relates to <a
href="http://mapserver.org/development/rfc/ms-rfc-115.html">http://mapserver.org/development/rfc/ms-rfc-115.html</a><br>
<br>
There are a couple of things I came across that are still unclear to
me relating to extents.<br>
<br>
<ul>
<li>Setting the EXTENT for a map has no effect when accessing via
WMS, apart from the BoundingBox of the GetCapabilities metadata.
Data is not restricted/limited.Not setting this leaves the MAP
level BoundingBox extent as -1,-1,-1,-1. Should the MAP EXTENT
have any other effects?<br>
</li>
</ul>
<ul>
<li>The help for LAYER EXTENT states "In most cases you will not
need to specify this, but it can be used to avoid the speed cost
of having MapServer compute the extents of the data" - however
all BoundingBox extents for each layer are automatically
calculated from the source data in the WMS GetCapabilities
request. I presume this could become quite slow with more and
more layers. Is it/should it be recommended to manually set
these (either with wms_extent in the LAYER METADATA or using
LAYER EXTENT)?</li>
</ul>
<p>Thanks for any clarifications on the above. <br>
</p>
<p>Regards,</p>
<p>Seth<br>
</p>
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