[jira] [Created] (SIS-574) Grid coverage dimensionality reduction

["Martin Desruisseaux (Jira)" <ji...@apache.org>]

Martin Desruisseaux created SIS-574:
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             Summary: Grid coverage dimensionality reduction
                 Key: SIS-574
                 URL: https://issues.apache.org/jira/browse/SIS-574
             Project: Spatial Information Systems
          Issue Type: Task
          Components: Coverage
            Reporter: Martin Desruisseaux
            Assignee: Martin Desruisseaux
             Fix For: 1.4


Provides methods for reducing the number of dimensions of a grid coverage. For example it should be possible to see a slice of a three-dimensional {{GridCoverage}} as two-dimensional {{GridCoverage}}.

We introduce a new public class, {{DimensionalityReduction}}, which contains information about which grid axes to keep ({{select(…)} method) or remove ({{remove(…)} method). Other methods allow to specify which coordinates to use in the removed axes for making a slice. That {{DimensionalityReduction}} class contains {{apply(…)}} methods for applying dimensionality reduction on a {{GridExtent}}, {{GridGeometry}}, {{GridCoverage}}, {{DirectPosition}} among others, and also a few {{reverse(…)}} methods for "inflating" a {{GridExtent}} or {{GridGeometry}} to the original number of dimensions. The latter are necessary for delegating read operations of a slice to the original {{DataStore}}.

This is part of the [pull request #32|https://github.com/apache/sis/pull/32], refactored with the introduction of above-cited {{DimensionalityReduction}} class.



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