org.apache.sis.storage

Interface DataSet

All Superinterfaces:

Resource

All Known Subinterfaces:

FeatureSet

public interface DataSet
extends Resource

Collection of features that share a common set of attributes or properties. Features may be organized in coverages, but not necessarily. The common set of properties is described by feature types, grid geometries or sample dimensions, depending on the Data­Set subtype. The actual values are provided by methods defined in Data­Set subtypes.

Example: the features contained in a Data­Set could be all bridges in a city. A Data­Set can be associated to one Feature­Type which specifies that all bridges shall have "construction date" and "height" attributes, and an arbitrary amount of Feature instances which contains the actual values for all bridges in the dataset.

Metadata

Datasets should have metadata / metadata­Scope / resource­Scope sets to Scope­Code.DATASET. If this datasets is part of a series or an Aggregate, the aggregate name should be declared as the parent metadata. That parent metadata is often the same instance than Data­Store.get­Metadata().

Since:

0.8

Defined in the sis-storage module

Method Summary

Modifier and Type	Method and Description
Envelope	getEnvelope() Returns the spatio-temporal extent of this resource in its most natural coordinate reference system.

Methods inherited from interface Resource

get­Metadata

Method Detail

getEnvelope

Envelope getEnvelope()
              throws DataStoreException

Returns the spatio-temporal extent of this resource in its most natural coordinate reference system. The following relationship to Resource.getMetadata() should hold:

• The envelope should be contained in the union of all geographic, vertical or temporal extents described by metadata / identification­Info / extent.
• The coordinate reference system should be one of the instances returned by reference­System­Info.

The envelope should use the coordinate reference system (CRS) that most closely matches the geometry of the resource storage. It is often a projected CRS, but other types like engineering CRS are also allowed. If this resource uses many different CRS with none of them covering all data, then the envelope should use a global system (typically a geographic CRS).

Returns:

the spatio-temporal resource extent. Should not be null.

Throws:

Data­Store­Exception - if an error occurred while reading or computing the envelope.