Lookup system for FDSN web services, predates the new FDSN DataCenters web service, which is now the preferred method, as this may be out of date.
Loads all known data centers. JSON top level has: created - modification date, datacenters - array of objects, each with id, name, website, email, host, region and and supports that is an array of type and version.
Promise<KnownDCS_JSON>:
a Promise that resolves to the returned json.
Forces a reload of the remote json. In general, because the data is updated infrequently, this is unlikely to be needed. However, a very long running instance may wish to update this periodically, likely at most daily.
Promise<KnownDCS_JSON>:
a Promise to known datacenters.
returns the hostname for type web service. In many cases this is the same as the host for the overall datacenter, but sometimes not all web services are hosted on the same machine. For example all fdsn web services at IRIS are hosted at service.iris.edu but the ringserver is hosted at rtserve.iris.edu
(DataCenterType)
data center
(string)
type of service
string:
host