This is what I came up with...
package org.geotools.tutorial.quickstart;
import java.io.File;
import java.io.IOException;
import java.util.logging.Level;
import java.util.logging.Logger;
import org.geotools.coverage.grid.GridCoverage2D;
import org.geotools.data.DataSourceException;
import org.geotools.factory.Hints;
import org.geotools.gce.geotiff.GeoTiffReader;
import org.geotools.geometry.DirectPosition2D;
import org.opengis.geometry.DirectPosition;
import org.opengis.referencing.crs.CoordinateReferenceSystem;
public class GetElevation {
//
https://gis.stackexchange.com/questions/230237/looking-for-the-simplest-way-to-get-elevation-for-a-give-wgs84-coordinate/230253
// http://docs.geotools.org/latest/userguide/library/coverage/grid.html
//
https://www.programcreek.com/java-api-examples/?api=org.geotools.geometry.DirectPosition2D
public static void main(String[] args) throws IOException {
// GET TILES HERE: http://dwtkns.com/srtm/
File rasterFile = new File("/tmp/srtm_20_07.tif");
GeoTiffReader reader;
try {
double lat = -81.36;
double lon = 27.28;
reader = new GeoTiffReader(rasterFile, new
Hints(Hints.FORCE_LONGITUDE_FIRST_AXIS_ORDER, Boolean.TRUE));
GridCoverage2D coverage = reader.read(null);
CoordinateReferenceSystem crs =
coverage.getCoordinateReferenceSystem2D();
DirectPosition position = new DirectPosition2D(lat, lon);
double elev = coverage.evaluate(position, (double[]) null)[0];
System.out.println(lat + " lat");
System.out.println(lon + " lon");
System.out.println(elev + " meters");
} catch (DataSourceException ex) {
Logger.getLogger(GetElevation.class.getName()).log(Level.SEVERE,
null, ex);
}
}
}
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