According to Vastu the site of a town should be selected at the bank of a river, sea shore or lake. The site should be surrounded by milky trees, full of fruits and flowers. The Eastern side of the town should be lowered to get sun rays on the door fronts. The site should not be selected on the Western side of a mountain. The capital of the state should be selected at the centre of a town classified as: Stanya, Dronamukha, Kharvitika, Sarhgrahana.

Shapes of Town

Vastu Sastra recommends five shapes of towns:
1. Chandura (square)
2. Agatara (rectangle)
3. Vritta (circle)
4. Krittta Vritta (elliptical)
5. Gola Vritta (full circle)

A city resembling a diamond (octagonal) should be regarded as inauspicious. If the front part of the city is in the shape of a bow, it is very good and auspicious. The Agni Purana recommends highly the semi- lunar shape of the town. The holy city of Banaras is situated on the convex side of the Gangetic belt and presents a semilunar phase. Nanjangud town near Mysore also is situated on the convex side of the river Kapila. The Matsya Purana says that the semilunar shape of a town is not auspicious. The development of industrial factories at Nanjangud brings the shape of the town to a semilunar aspect. This is not auspicious. The factories may become sick.

The engineer should consider the weather records of the area for the past ten years in designing any building. From the weather records obtained from the meteorological centre of the region, we can understand the influence of the site affected by the weather. If the buildings are designed considering the facts like I the weather data, wind velocity and its direction, rainfall, evaporation, humidity of the area, sunlight and maximum and minimum temperature, etc., it will satisfy most of the specifications of Vastu.

The Agni Purana says that the semilunar shape of the town is only useful for a riparian town, but not for a cosmopolitan city of the now developed Nanjangud.

The Matsya Purana says that the semilunar shape of the town will have a weak defense. People will be too selfish and expect too much with too little effort. In general, the semilunar shaped town will face much difficulty in power, water supply, drainage, transport and communications and most of the factories will become sick.