As per vastu, the shape of land have certain kinds of effects which are as follows

1. Rectangular - Auspicious
2. Square- Good for gains of wealth.
3. Bhadrasan- Success
4. Circular- Auspicious.
5. Chakrakar- Poverty.
6. A land having odd number of sides e.g. three, five etc.- Sorrow.
7. Triangular- Accidents, quarrels and wrath of govt.
(Tax penalties or adverse results of court cases etc.)
8. Shape of a bullock cart- Poverty.
9. Dandanamak - Loss of animals ( vehicles in our times )
10. Shape of a Mridanga (An indian Musical instrument)- Troubles and death of wife.
11. Brihan Mukhi - Troubles for friends and relatives.
12. Vyajan - Loss of wealth.
13. Land elevated in the middle.- Creates evil tendencies of crime or murder etc.
14. Serpent like shape.- Loss of wealth.
15. Bow like shape.- Prone to thefts, worries, fears.
16. Trishul like shape.- Gives birth to warriors.
17. Elephant like shape.- Gives wealth.
18. Bull like shape.- Increases animal-wealth.
19. Egg like shape.- Gives birth to social workers, and persons capable of making sacrifices.
20. Flag like shape.- Gives fame.
21. Tabla like shape (Indian musical instrument)- Extinction of family.
22. Uneven land.- Sorrow.
23. Danda(stick)like shape.- Loss of animal wealth.
24. Sieve like shape.- Loss of cows.
25. Shape of a tortoise.- Imprisonment.
26. Pot or Panigranate (a fruit) like shape.- Disease like leprosy or other disease of the same nature.
27. Fan like shape.- Loss of eye sight and wealth.
28. Mudgar, Gada (a weapon) like shape. - Loss of friends and relatives.