Horizontal datums are used for describing a point on the earth 's surface, in latitude and longitude or another coordinate system. Vertical datums measure elevations or depths. In engineering and drafting, a datum is a reference point, surface, or axis on an object against which measurements are made.orizontal datums are used for describing a point on the earth 's surface, in latitude and longitude or another coordinate system. Vertical datums measure elevations or depths. In engineering and drafting, a datum is a reference point, surface, or axis on an object against which measurements are made.
There are 25 known species of pythons in the world. Like all snakes, pythons are cold blooded. Pythons are not venomous; they kill their prey by constriction. Some of the different types of pythons are the reticulated python, the ball python, the Burmese python, the green tree python, and the carpet python. While some of these species should not be held captive by a non-professional, other types of pythons can make good pets.
Coral snake is a close relative of cobras, mambas and sea snakes. There are 65 species of coral snakes that can be found through the whole world. Some of them live in the water, but most of them are terrestrial (living on the land), preferring the habitats such as marshes, swamps, scrub areas and forests.oral snakes are not very large. Rare specimens may reach 3 feet in length, but most of them are 18 to 20 inches long. Coral snakes are characterized by specific body coloration which consists of black, red and yellow bands. Some species may have pink or blue bands, while some others lack the bands completely.