1, hectare: the hectare is the international land area unit, and the symbol is ha. It is equal to the area of a square with a length of 100 m and a width of 100 m, that is, 1 hectare = 100 m×100 m = 1000 m2. A hectare is a small unit, usually used to measure the area of cities, villages, buildings, etc.
2. Square kilometer: Square kilometer is the large unit of land area, with the symbol km? . It is equal to the area of a square with length 1km and width 1km, that is,1km =/km ×1km =100000 square meters. The square kilometer is a large unit, which is usually used to measure large areas of land, such as provinces and countries.
3. Conversion between hectares and square kilometers: 1 square kilometers = 100000 square meters and 1 hectare = 1000 square meters, so 1 square kilometers = 1000 hectares. For example, a piece of farmland with an area of 25 square kilometers and an area of 25,000 hectares.
Practical application of hectares and square kilometers
1. Urban planning: In urban planning, statistics and analysis of urban land area are often needed. At this time, you can better understand the land use of the city in hectares or square kilometers. For example, a city covers an area of 3,500 hectares, of which residential land accounts for 60%, commercial land accounts for 25% and public facilities land accounts for 15%.
2. Geographical research: In geographical research, the area is often measured in square kilometers to study the landform and vegetation distribution. For example, the vegetation coverage of a certain area is 60 square kilometers.
3. Real estate transaction: In real estate transaction, the building area and usable area of the house are usually in square meters, while the land area where the house is located is in hectares or square kilometers. This helps buyers to understand the actual use space of the house and the land price level in the area. For example, a real estate * * * has 2,500 houses, each with a usable area of 90 square meters, and the real estate covers an area of 3.5 hectares.