Answer:
There are lots of data sources available for map makers online. These data sources provides information on satellite imagery, topographical surveys, aerial photography, populations,natural features, etc. The information they provide is vital for the accuracy of a map. Some of these sources are;
- <u><em>Natural Earth</em></u>: A public free domain that provides cultural, physical and basemap data.
- <u><em>USGS Earth Explorer</em></u>: This data source provides an abundance of satellite and aerial imagery worldwide.
- <u><em>Open Topology</em></u>: Gives access to a high spatial resolution topographic data and tools like LiDAR (Light Detection and Ranging) Data.
- <u><em>UNEP Environmental Data Explorer</em></u>: This is a United Nations based data source. It provides useful data on population, forests, emissions, disasters and GDP of people and places.
- <u><em>Global Map Github</em></u>: provides useful data on boundaries, drainage, transportation, population centers, elevation, land cover, land use and vegetation of places on earth.
Water!!! think of hydrolics, answer is c!
Altocumulus - medium-level
Altostratus - medium-level
Cirrocumulus - high-level
Cirrus - high-level
Cumulus - low-level
Nimbostratus - high-level
Stratus - low-level
A tropical cyclone (TC) is a rotational low-pressure system in tropics when the central pressure falls by 5 to 6 hPa from the surrounding and maximum sustained wind speed reaches 34 knots (about 62 kmph). It is a vast violent whirl of 150 to 800 km, spiraling around a centre and progressing along the surface of the sea at a rate of 300 to 500 km a day.
The word cyclone has been derived from Greek word ‘cyclos’ which means ‘coiling of a snake’. The word cyclone was coined by Heary Piddington who worked as a Rapporteur in Kolkata during British rule. The terms "hurricane" and "typhoon" are region specific names for a strong "tropical cyclone". Tropical cyclones are called “Hurricanes” over the Atlantic Ocean and “Typhoons” over the Pacific Ocean. The reason is that the earth's rotation sets up an apparent force (called the Coriolis force) that pulls the winds to the right in the Northern Hemisphere (and to the left in the Southern Hemisphere). So, when a low pressure starts to form over north of the equator, the surface winds will flow inward trying to fill in the low and will be deflected to the right and a counter-clockwise rotation will be initiated. The opposite (a deflection to the left and a clockwise rotation) will occur south of the equator.
This Coriolis force is too tiny to effect rotation in, for example, water that is going down the drains of sinks and toilets. The rotation in those will be determined by the geometry of the container and the original motion of the water. Thus, one can find both clockwise and counter-clockwise flowing drains no matter what hemisphere you are located. If you don't believe this, test it out for yourself.
It is determined by by subtracting birth rate from death rate
