1. Name the coordinates on the surface of the earth in the North-South and East-
ID: 1839174 • Letter: 1
Question
1. Name the coordinates on the surface of the earth in the North-South and East-West directions 2. Simply stated, surveying involves the measurement of and 3. Name the two ways of measuring distances. 4. Name the two ways of measuring angles. 5. Where is the center of gravity? 6. Angles are measured in what units? 7. Area uses what type of units? 8. Volume uses what type of units? 9. How many square meters are in the metric area of a hectare? 10. On an engineer's tape and a level rod, how many divisions are there per foot?Explanation / Answer
1. North to South: Latitude East to West : Longitude
2. Surveying involves the measurement of Linear and Angular.
Reason: Through application of mathematics (geometry and trigonometry) and spatial information knowledge, the surveyor converts these measurements to the horizontal and vertical relationships necessary to produce maps, plans of engineering projects, or Geographical Information System/ Land Information System (GIS/LIS).
3. In surveying there are several methods for measurement of distance. They are
In any work, the choice of a method depends on many factors like field condition, accuracy required, availability of resources (instruments, time, skill, fund etc).
4. Bearing and Azimuth
Reason: Generally express angles in several ways, angles may be specified as bearings or azimuths. A bearing is an angle less than 90° within a quadrant defined by the cardinal directions. An azimuth is an angle between 0° and 360° measured clockwise from North.
5. Dead Center of the Earth.
Reason: The position of the center of gravity depends upon the distribution of mass. It may not be at the geometric center. But the earth being a very big object and human can make nullable impact on its mass distribution and it was formed through spinning, it's center of gravity should be very close to its geometric center.
6. Degrees and Radians.
Reason: The sexagesimal system of angular measurement is used. In the sexagesimal system, there are 360° in the circumference of a circle. The basic unit is the degree (°), which is further divided into 60 minutes (60'), and the minute is subdivided into 60 seconds (60"). Other angular unit systems utilize 400g (grads) or 2pi Radians per complete circle (360°).
7. Acre
Reason: Different countries uses different units. For example: India and US uses Acre. Canada uses arpent. It depends on the place and what engineers want to adopt.
8. Cubic Feet or Acre-Foot.
Reason: According to English system are typically given in cubic feet or cubic yards. For larger volumes we use the unit acre-foot. It is equivalent to the area of an acre having a depth of 1 foot. Volumes in the metric system are given in cubic meters.
9. 10,000 square meters.
Reason: Unit conversion 1 hectare = 10,000 Sq. Meters.
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