[webservices] New web service announcement

[Robert Weekly]

Hello web service users,

The DMC is pleased to announce the release of a new web service called metadatachange (ver 1.0.2):

http://service.iris.edu/irisws/metadatachange/1/

The DMC has been tracking important changes to metadata received as SEED since January 2014.  The purpose of this service is to search for and return entries in this accumulating set of changes.  There are many uses for this information, such as checking for critical changes in metadata (after the initial download) before publishing results.

Some examples of the types of changes that can be queried for include the geographic location of channels, sensor orientation, sensor type, and instrument response.  A complete list of the searchable metadata as well as example queries can be found on the main service page, at the link above.  Results are returned as XML.

A URL Builder (http://service.iris.edu/irisws/metadatachange/docs/1/builder/) is available help explore the service and data set.

We welcome feedback, questions, etc.

Sincerely,
The Web Services Team
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