code: public static TIN readTIN(ByteReader reader, boolean hasZ, boolean hasM) {
  
  		TIN tin = new TIN(hasZ, hasM);
  
  		int numPolygons = reader.readInt();
  
  		for (int i = 0; i < numPolygons; i++) {
  			Polygon polygon = readGeometry(reader, Polygon.class);
  			tin.addPolygon(polygon);
  
  		}
  
  		return tin;
  	}
docs: Read a TIN
  
  @param reader
  @param hasZ
  @param hasM
  @return TIN