Due to the current gap in continued funding from the U.S. National Science Foundation (NSF), the NSF Unidata Program Center has temporarily paused most operations. See NSF Unidata Pause in Most Operations for details.
Due to the current gap in continued funding from the U.S. National Science Foundation (NSF), the NSF Unidata Program Center has temporarily paused most operations. See NSF Unidata Pause in Most Operations for details.
Hello,In the attached test case, inconsistent coordinate results are returned depending on which methods of the NetCDF Java API are called (tested against v4.2.26).
Sample output: Using coordAxis.getMinValue() method ----- minLon=-86.76239013671875 maxLon=268.2677307128906 minLat=21.105741500854492 maxLat=31.007230758666992 Using CoordinateAxis1D method ----- minLon=-86.76998901367188 maxLon=280.256103515625 minLat=18.15138816833496 maxLat=31.010635375976562 Using read method ----- minLon=-97.85687255859375 maxLon=-79.7386474609375 minLat=18.15138816833496 maxLat=31.010635375976562 -Dave
package gov.noaa.eds.threddsutilities.util;
import static org.junit.Assert.assertTrue;
import java.util.List;
import org.junit.Test;
import ucar.ma2.Array;
import ucar.nc2.Variable;
import ucar.nc2.constants.AxisType;
import ucar.nc2.dataset.CoordinateAxis;
import ucar.nc2.dataset.CoordinateAxis1D;
import ucar.nc2.dataset.NetcdfDataset;
public class ThreddsExtentUtilTest {
@Test
public void getExtentTest() {
// String urlStr =
//
"http://oos.soest.hawaii.edu/thredds/dodsC/pacioos/ncom/global/NCOM_Global_Ocean_Model_best.ncd";;
// String urlStr =
//
"http://localhost:8080/thredds/dodsC/test/ncom_glb_sfc_2011050100.nc";;
// String urlStr =
//
"dods://dods.ndbc.noaa.gov/thredds/dodsC/data/oceansites/DATA/MBARI/OS_MBARI-M0_20100614_R_M.nc";
// String urlStr =
//
"dods://dods.ndbc.noaa.gov/thredds/dodsC/data/oceansites/DATA/ANTARES/OS_ANTARES-1_200509_D_CTD.nc";
String urlStr =
"dods://testbedapps.sura.org/threddsdev/dodsC/inundation/FVCOM/ike/2Dvrwoww";
try {
NetcdfDataset ncd = NetcdfDataset.openDataset(urlStr);
List<CoordinateAxis> coordAxes =
ncd.getCoordinateAxes();
try {
double maxLon = -9999.999;
double minLon = 9999.999;
double maxLat = -9999.999;
double minLat = 9999.999;
for (CoordinateAxis coordAxis : coordAxes) {
if (coordAxis.getAxisType() ==
AxisType.Lat) {
minLat =
coordAxis.getMinValue();
maxLat =
coordAxis.getMaxValue();
}
if (coordAxis.getAxisType() ==
AxisType.Lon) {
minLon =
coordAxis.getMinValue();
maxLon =
coordAxis.getMaxValue();
}
}
System.out
.println("Using
coordAxis.getMinValue() method -----");
System.out.println("minLon=" + minLon);
System.out.println("maxLon=" + maxLon);
System.out.println("minLat=" + minLat);
System.out.println("maxLat=" + maxLat);
assertTrue(maxLon > -180.0);
} catch (Exception e) {
System.out
.println("Warning CF Axis
problem: " + e.getMessage());
}
} catch (Exception e) {
System.err.println(e);
}
}
@Test
public void getExtentUsing1DCoordTest() {
// String urlStr =
//
"dods://dods.ndbc.noaa.gov/thredds/dodsC/data/oceansites/DATA/ANTARES/OS_ANTARES-1_200509_D_CTD.nc";
// String varName = "LONGITUDE";
String urlStr =
"dods://testbedapps.sura.org/threddsdev/dodsC/inundation/FVCOM/ike/2Dvrwoww";
String lonName = "lon";
String latName = "lat";
try {
NetcdfDataset ncd = NetcdfDataset.openDataset(urlStr);
CoordinateAxis1D coordLon = (CoordinateAxis1D) ncd
.findVariable(lonName);
double maxLon = -9999.999;
double minLon = 9999.999;
double[] vals = coordLon.getCoordValues();
for (int i = 0; i < vals.length; i++) {
double lon = vals[i];
// System.out.println("lon=" + lon);
if (lon > maxLon) {
maxLon = lon;
}
if (lon < minLon) {
minLon = lon;
}
}
CoordinateAxis1D coordLat = (CoordinateAxis1D) ncd
.findVariable(latName);
double maxLat = -9999.999;
double minLat = 9999.999;
vals = coordLat.getCoordValues();
for (int i = 0; i < vals.length; i++) {
double lat = vals[i];
// System.out.println("lat=" + lat);
if (lat > maxLat) {
maxLat = lat;
}
if (lat < minLat) {
minLat = lat;
}
}
System.out.println("");
System.out.println("Using CoordinateAxis1D method
-----");
System.out.println("minLon=" + minLon);
System.out.println("maxLon=" + maxLon);
System.out.println("minLat=" + minLat);
System.out.println("maxLat=" + maxLat);
assertTrue(maxLon > -180.0);
} catch (Exception e) {
System.err.println(e);
}
}
@Test
public void getExtentUsingReadTest() {
// String urlStr =
//
"dods://dods.ndbc.noaa.gov/thredds/dodsC/data/oceansites/DATA/ANTARES/OS_ANTARES-1_200509_D_CTD.nc";
// String varName = "LONGITUDE";
String urlStr =
"dods://testbedapps.sura.org/threddsdev/dodsC/inundation/FVCOM/ike/2Dvrwoww";
String lonName = "lon";
String latName = "lat";
try {
NetcdfDataset ncd = NetcdfDataset.openDataset(urlStr);
Variable varLon = ncd.findVariable(lonName);
double maxLon = -9999.999;
double minLon = 9999.999;
Array vals = varLon.read();
for (int i = 0; i < vals.getSize(); i++) {
double lon = vals.getDouble(i);
// System.out.println("lon=" + lon);
if (lon > maxLon) {
maxLon = lon;
}
if (lon < minLon) {
minLon = lon;
}
}
Variable varLat = ncd.findVariable(latName);
double maxLat = -9999.999;
double minLat = 9999.999;
vals = varLat.read();
for (int i = 0; i < vals.getSize(); i++) {
double lat = vals.getDouble(i);
// System.out.println("lat=" + lat);
if (lat > maxLat) {
maxLat = lat;
}
if (lat < minLat) {
minLat = lat;
}
}
System.out.println("");
System.out.println("Using read method -----");
System.out.println("minLon=" + minLon);
System.out.println("maxLon=" + maxLon);
System.out.println("minLat=" + minLat);
System.out.println("maxLat=" + maxLat);
assertTrue(maxLon > -180.0);
} catch (Exception e) {
System.err.println(e);
}
}
}
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