Jal International Land Surveyor Interview Questions and Answers for Experienced

To convert quadrant bearing to whole circle bearing, add 90 degrees to the quadrant bearing.

• Quadrant bearings range from 0 to 90 degrees.

• Whole circle bearings range from 0 to 360 degrees.

• To convert, add 90 degrees to the quadrant bearing.

• For example, a quadrant bearing of N45°E would become 135°.

Contours are lines on a map that connect points of equal elevation, representing the shape and relief of the land.

• Contours are used in land surveying to depict the topography of an area.

• They connect points of equal elevation, allowing surveyors to visualize the shape and relief of the land.

• Contours are typically represented as curved lines on a map, with each line representing a specific elevation.

• The spacing between c...read more

To find out the angle and distance of a polygon, you can use trigonometry and surveying techniques.

• Measure the lengths of each side of the polygon using a tape measure or surveying equipment.

• Use a theodolite or total station to measure the angles between each side of the polygon.

• Apply trigonometric formulas to calculate the angles and distances based on the measured values.

• For example, you can use the Law of Cosines to...read more

UTM stands for Universal Transverse Mercator. It is a coordinate system used to locate positions on the Earth's surface.

• UTM is a grid-based system that divides the Earth into 60 zones, each 6 degrees of longitude wide.

• It uses a metric coordinate system, with eastings and northings measured in meters.

• UTM coordinates consist of a zone number, hemisphere (N or S), easting, and northing.

• For example, a UTM coordinate might ...read more

WGS stands for World Geodetic System, a standard reference system used for mapping and surveying the Earth.

• WGS is a global coordinate system used to accurately represent the Earth's surface.

• It provides a consistent framework for measuring and locating points on the Earth's surface.

• WGS is commonly used in GPS navigation, cartography, and land surveying.

• It uses latitude and longitude coordinates to define positions on th...read more

Working with GPS involves understanding its functions, using the correct equipment, and interpreting the data accurately.

• Learn the basic functions of GPS devices and how to operate them.

• Ensure that the GPS device is properly calibrated and has a clear view of the sky for accurate readings.

• Use the appropriate GPS equipment for the specific surveying task, such as a handheld GPS unit or a survey-grade GPS receiver.

• Unders...read more

The number of satellites a GPS receiver wants depends on its accuracy requirements and the availability of satellite signals.

• The minimum number of satellites required for a GPS receiver to function is 4.

• Most GPS receivers aim to acquire signals from at least 8 to 12 satellites for better accuracy.

• The more satellites a GPS receiver can track, the more accurate its positioning and timing information becomes.

• GPS receivers...read more

The principle of surveying involves measuring and mapping the Earth's surface to determine the relative positions of points.

• Surveying is used to establish property boundaries, create topographic maps, and plan construction projects.

• The principle of surveying relies on accurate measurements using various instruments such as total stations, GPS receivers, and levels.

• Surveyors use mathematical calculations and trigonometr...read more

The machine total station can be set up using the bech mark as a reference point.

• Place the total station over the bech mark.

• Level the instrument using the built-in bubble level.

• Enter the coordinates of the bech mark into the total station.

• Perform a backsight measurement to the bech mark.

• Perform a foresight measurement to the desired point.

• Record the data and repeat for additional points.

• Adjust the instrument as necessa