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.
Types of Snake Venom As explained in the introduction venomous snakes can be classified into three classes the snake venoms for two are explain below: 1) The elapines, short front fangs (Proteroglyphs) snakes, which include the cobra, mamba, and coral snakes, their venom is neurotoxic (nerve toxins) and paralyses the respiratory centre. Animals that survive these bites seldom have any sequelae (aftereffects of the snake bite such as tissue damage).