to build a URL to the
web service. Notice that as you edit the form,
the link is automatically updated.
What is the nodata=404 URL parameter?
This form primarily serves to illustrate how to create
mustang-measurements URLs and includes a fixed sequence of
temporal and value constraints.
||This parameter identifies a particular metric to show the measurements of.
||You can define a specific target string, or apply a SNCLQ filter.
The five components, in N.S.L.C.Q order are:
- Target: This parameter allows individual
targets to be named directly in N.S.L.C.Q order. See list below.
- SNCLQ filter: These parameters select the
targets that match the given SNCLQ components. Quality is left undefined.
Note: The wildcards
- Network – a SEED network code – ex. IU
- Station – a SEED station code – ex. ANMO
- Location – a SEED location code – ex. 00
- Channel – a SEED channel code – ex. BH1
- Quality – a DMC quality flag – ex. M
? can be used in Target mode. You can also
leave fields empty to exclude them.
||Returned data format.
||The following parameters impose various time
constraints on the query. The list of metrics returned
by the service will be restricted to include only those
that have measurements in the appropriate time range.
- timewindow – two comma–separated
dates specify a time range that must contain measurements
- startbefore – get measurements starting before the defined time.
- startafter – get measurements starting after the defined time.
- endbefore – get measurements ending before the defined time.
- endafter – get measurements ending after the defined time.
||Every metric has one or more fields for the measurements
it contains. You can enter the name of a
in the parameter text box. The most common of these
value, but some metrics are more specific,
so we leave this as a text entry. We can filter our
query based on comparators to these value fields by
adding the parameter name in combination with one of
operator suffixes to the URL:
There are other operators available, which can
be referenced in the web service documentation.
_eq – Equal (the default if no extension is used)
_gt – Greater than
_lt – Less than
||Specify time as: YYYY-MM-DDTHH:mm:ss (e.g. "2010-06-14T00:00:00").
||If no data is returned by the service, return
a 404 response rather than the
Learn more about HTTP response codes.
Problems with this service?
Please send an email report of which service you were using, your URL query, and any error feedback to:
data-help AT earthscope.org
We will address your issue as soon as possible.