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
Geneva Seal which is composed of a centre for certifications (Hallmark of Geneva, COSC, Sport time-keeping) and a centre for Research and Development.) The Geneva seal in horology (watches), is a certification reserved for wrist watch movements made in the City or Canton of Geneva. Although it is concerned mainly with the finishing and decoration of the watch movement, it is considered a high accolade in the industry. Precision testing, though not mandatory, is an option in the inspection process. The Geneva Seal is the quality and Canton of Geneva. It is a certification reserved for wrist and pocket watch movements made