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Searching the catalog

The catalog holds three main types of entities:

  • Provider describes an individual or organization providing a service.
  • Service is an endpoint identified by an URL to access provided resources and consists of Layers.
  • Layer is a view on data provided by the a service. 

Both Services and Layers can be searched by temporal and geographical extent. It 's is also possible to search in service and layer metadata. Have For model structure and semantics habe a look at the models section. Please see also API documentation for interface details.

Example: search for layers providing data beginning with 2010

Set the start_date query parameter as UTC time string.

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Add the search query parameter to your constraints. To search for "temperature" in the title of a Layer use for exampleyou can use something like this

Code Block
https://marine-data.de/servcat/rest/layers?start_date=2010-01-01T00:00:00&search=title==*temperature*&offset=0&limit=10

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OperatorExampleComment
LogicalAND, OR
Semicolon ; can be used as shorthand AND. Comma can be used as shorthand OR.
Equal to==

https://marine-data.de/servcat/rest/layers?search=title==*temperature*

https://marine-data.de/servcat/rest/layers?search=parent_name=="Maximum Shear Stress"

Compares the whole field value. Use *value* to find value anywhere in the fieldfields content.
Not equal to!=https://marine-data.de/servcat/rest/layers?search=title!=*temperature*
Less than<https://marine-data.de/servcat/rest/layers?search=date_time_start<2020-01-01T00:00:00
Less than or equal to<=

https://marine-data.de/servcat/rest/layers?search=date_time_start<=2020-01-01T00:00:00


Greater than>https://marine-data.de/servcat/rest/layers?search=date_time_start>2020-01-01T00:00:00
Greater than or equal to>=https://marine-data.de/servcat/rest/layers?search=date_time_start>=2020-01-01T00:00:00
In=in=https://marine-data.de/servcat/rest/layers?search=service.provider.acronym=in=(AWI,HZG)&limit=100Compares any value (e.g. AWI and HZG) in brackets with field values.
Not in=out=

Contains=contains=https://marine-data.de/servcat/rest/layers?search=available_crs=contains=(EPSG:3857)Compares a model array field or geometries.

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