Geneva 15.7%. Of the agricultural land, 0.3% is used for growing crops. Of the water in the municipality, 0.2% is composed of lakes and 2.9% is rivers and streams. The altitude of Geneva is , and corresponds to the altitude of the largest of the Pierres du Niton, two large rocks emerging from the lake which date from the last ice age. This rock was chosen by General Guillaume Henri Dufour as the reference point for surveying in Switzerland. The second main river of Geneva is the Arve, which flows into the Rhône just west of the city centre. Mont Blanc
County of Geneva about 970 and died about 1020. The county never played a major part as a feudal entity. The city of Geneva and its environs were retained, but the approaches to the western end of Lake Geneva, which had made the position strategic, were soon lost. In 1124 the Bishops of Geneva had their rule over the city acknowledged and continued to make themselves an independent force, while the Counts of Savoy encircled the territory and controlled the trade routes. From 1219 on, the counts' stronghold and capital was Annecy. At a moment when the male line of the counts was