visad/src/main/java/ucar/nc2/iosp/grid/GridHorizCoordSys.java
private double getGridSpacingInKm(String type) {
    double value = gds.getDouble(type);
    if (Double.isNaN(value)) return value;
    String gridUnit = gds.getParam(GridDefRecord.GRID_UNITS);
    SimpleUnit unit;

    if (gridUnit == null || gridUnit.length() == 0) {
      unit = SimpleUnit.meterUnit;
    } else {
      unit = SimpleUnit.factory(gridUnit);
    }
    if (unit != null && SimpleUnit.isCompatible(unit.getUnitString(), "km")) {
      value = unit.convertTo(value, SimpleUnit.kmUnit);
    }
    return value;

  }
private double getGridSpacingInKm(String type) {
    double value = gds.getDouble(type);
    if (Double.isNaN(value)) return value;
    String gridUnit = gds.getParam(GridDefRecord.GRID_UNITS);
    SimpleUnit unit;

    if (gridUnit == null || gridUnit.length() == 0) {
      unit = SimpleUnit.meterUnit;
    } else {
      unit = SimpleUnit.factory(gridUnit);
    }
    if (unit != null && SimpleUnit.isCompatible(unit.getUnitString(), "km")) {
      value = unit.convertTo(value, SimpleUnit.kmUnit);
    }
    return value;

  }
Get the grid spacing in kilometers
@param type param name
@return the grid spacing in kilometers