protected GribCollectionProto.Coord writeCoordProto(VertCoord vc, int index) throws IOException {
GribCollectionProto.Coord.Builder b = GribCollectionProto.Coord.newBuilder();
b.setCode(vc.getCode());
b.setUnit(vc.getUnits());
for (VertCoord.Level coord : vc.getCoords()) {
if (vc.isLayer()) {
b.addValues((float) coord.getValue1());
b.addBound((float) coord.getValue2());
} else {
b.addValues((float) coord.getValue1());
}
}
return b.build();
}