GIS Question 1 Angular measurements North or South of the Equator are measured u

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GIS


Question 1
Angular measurements North or South of the Equator are measured using_______while angular measurements East or West of the Prime Meridian are called______.

Latitude, Longitude

Longitude, Latitude

Meridians, Parallels

Eastings, Northings

Question 2

Today, in the US we mainly use ____ when using NAD83.

Clarke 1866

WGS 1984

GRS 1980

Clarke 1866

Question 3

A________ is comprised of two parts, 1) an ellipsoid with a spherical coordinate system and an origin, and 2) a set of points and lines that have been painstakingly surveyed using the best survey methods and survey equipment available.

Oblated Spheroid

Geoid

Horizontal Datum

Ellipsoid

Question 4

A______ is a measurement based model of the earth, which is a gravitational equipotential surface, meaning a standard surface of equal gravitational pull. This is the shape the earth would appear as if it were covered by an ocean, not effected by winds, tides or the moon.

Oblated spheroid

Ellipsoid

Geoid

DEM

Question 5

Although the location is no longer current, based on an international agreement of 1884, the Prime Meridian runs through_______.

Saint Peters Cathedral, at the Vatican

University of Stockholm, Sweden

The Royal Greenwich Observatory

The United Nations building, New York

Question 6

In most official ellipsoids, the flattening factor is represented by a number very close to _____.

1/1,000,000

1/5

1/300

1/24,000

Question 7

The science of measuring the shape of the earth is known as_________.

Cartography

Geology

Topology

Geodesy

Question 8

For the earth, the Equatorial radius is known as the ____axis, because it is greater in distance than the Polar radius which represents the ______ axis.

semi-minor, polar

semi-major, semi-minor

semi-minor, semi-major

semi-major, equatorial

Question 9

Isaac Newton reasoned that the shape of the earth must be a _______ because centrifugal forces caused the earth to bulge as it spins on its axis.

Rhombus

Ellipsoid

Sphere

Decahedron

Question 10

Eratosthenes was able to calculate the circumference of the earth by_________.

Taking precise astronomical readings of stars in the Northern and Southern Hemisphere.

Calculating the amount of time it took sailing vessels to disappeared over the horizon, when ships sailed at constant speeds.

Comparing sun angles at two locations, during the summer solstice, the longest day of the year when the sun is directly overhead.

Measuring the size the shadow casts on the moon during an eclipse

Latitude, Longitude

Longitude, Latitude

Meridians, Parallels

Eastings, Northings

Explanation / Answer

1. Meridians , parallels

2. WGS 1984

3. Ellipsoid

4. DEM

5. University of Stockholm, Sweden

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