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The OpenTripPlanner multimodal journey planning system

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package org.opentripplanner.graph_builder.services.ned;

import org.geotools.coverage.grid.GridCoverage2D;
import org.opengis.coverage.Coverage;
import org.opentripplanner.routing.graph.Graph;

/**
 * Factory interface specifying the ability to generate GeoTools {@link GridCoverage2D} objects 
 * representing National Elevation Dataset (NED) raster data. 
 * 
 * @author demory
 *
 */

public interface ElevationGridCoverageFactory {
    /** Creates a new coverage instance from files already fetched */
    public Coverage getGridCoverage();

    public void checkInputs();

    /** Sets the graph of the factory and initiates the fetching of data that is not present in the cache */
    public void fetchData(Graph graph);
}