seek(treFatBlock.getSubfileOffset() + treHeader.getPolylineOverviewSectionOffset());
int numberOfPolylines =
treHeader.getPolylineOverviewSectionLength() /
treHeader.getPolylineOverviewRecordsSize();
for (int i = 0; i < numberOfPolylines; i++) {
Polyline polyline = new Polyline();
polyline.setNumber(i + 1);
// Polyline type
nextByte(); // fixme, siempre es por default? no se usa el byte?
polyline.setType(PolylineType.DEFAULT);
// Maximum level
polyline.setMaximumLevelWherePresent(nextByte());
if (treHeader.getPolylineOverviewRecordsSize() == 3) {
skipBytes(1);
}