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From "Martin Desruisseaux (Jira)" <j...@apache.org>
Subject [jira] [Created] (SIS-485) Replace GridCoverage.evaluate(DirectPosition, …) method
Date Wed, 18 Dec 2019 13:07:00 GMT
Martin Desruisseaux created SIS-485:
---------------------------------------

             Summary: Replace GridCoverage.evaluate(DirectPosition, …) method
                 Key: SIS-485
                 URL: https://issues.apache.org/jira/browse/SIS-485
             Project: Spatial Information Systems
          Issue Type: Task
          Components: Features
            Reporter: Martin Desruisseaux
             Fix For: 1.1


The following method has been added in the {{GridCoverage}} class in the development branch:

{code:java}
public double[] evaluate(final DirectPosition point, double[] buffer) throws CannotEvaluateException;
{code}

However this method is inefficient if invoked for more than one point (which is a typical
scenario). It may trig many readings of small areas, construct many times the same {{CoordinateOperation}},
_etc._ Furthermore it does not allow users to control the interpolatipn method.

An alternative approach could be to define a separated {{Evaluator}} class with methods for
setting the interpolation types among other. All coordinates to evaluate could be specified
in advance, allowing {{Evaluator}} to perform only one larger read operation instead than
many small operations.

We may keep {{GridCoverage.evaluate}} as a convenience method when there is really only one
point to evaluate. But we would need to clarify at least the policy regarding interpolation
method.



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