[mapserver-users] wcs_timeposition: explicit listing or start/end range?

Alexander Petkov greenkov at gmail.com
Fri Aug 15 08:49:27 PDT 2008


I am trying to allow data downloads via a GetCoverage requests from a
mapserver-backed web coverage service.

>From the documentation, it would appear that the  wcs_timeposition in
a layers'  metadata section can specify the start and end time
positions for the layer.
wcs_timeposition

    * Description: (Optional) A list of the start and end time of a
given coverage (i.e. "2000-11-11T11:11:11Z,2001-11-11T11:11:11Z"),
used when advertising GetCapabilities.

However, in practice, it looks like each time position needs to be
listed explicitly, or else an exception is thrown:
<ServiceExceptionReport version="1.2.0"
xsi:schemaLocation="http://www.opengis.net/ogc
http://schemas.opengis.net/wcs/1.0.0/OGC-exception.xsd">
<ServiceException code="InvalidParameterValue" locator="time">
msWCSGetCoverage(): WCS server error. The coverage does not have a
time position of 2005-12-20.

</ServiceException>
</ServiceExceptionReport>

Is it possible to define the time extent with start and end time
stamps, and time resolution, similar to the wms_timeextent parameter?
Otherwise, my time position list would end up being rather long for a
coverage that has data for several years...

TIA,
Alex



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