ARCGIS TRAINING UPDATED Questions
and CORRECT Answers
What is the difference between a Projected Coordinate System and a Geographic Coordinate
System? - CORRECT ANSWER - A Geographic Coordinate System is used to locate
objects on the curved surface of the Earth.
A Projected Coordinate System is used to locate objects on a flat surface, e.g. a paper map
[What are the features of a Geographic Coordinate System? How do they measure/indicate
location?] - CORRECT ANSWER - Graticule - consists of intersecting vertical and
horizontal lines, which are called longitude (meridians) and latitude (parallels) respectively.
Measurements are expressed in degrees, minutes, and seconds.
What is an attribute? - CORRECT ANSWER - Information about a geographic feature in a
GIS, generally stored in a table and linked to the feature by a unique identifier. For example,
attributes of a river might include its name, length, and average depth.
What is a class? - CORRECT ANSWER - A group or category of attribute values; a set of
entities possessing certain common attribute values.
What is a coordinate system? - CORRECT ANSWER - A reference system used to locate
geographic features on a two- or three-dimensional surface. A coordinate system is comprised of
a spheroid, datum, projection, and units. Common coordinate systems are geographic (three-
dimensional), in which locations are measured in degrees of latitude and longitude, and planar
(also called projected or Cartesian), in which the earth's surface is projected onto a two-
dimensional plane and locations are measured in meters or feet.
What is a datum? - CORRECT ANSWER - The reference specifications of a measurement
system, usually a system of coordinate positions on a surface (a horizontal datum) or heights
above or below a surface (a vertical datum).
and CORRECT Answers
What is the difference between a Projected Coordinate System and a Geographic Coordinate
System? - CORRECT ANSWER - A Geographic Coordinate System is used to locate
objects on the curved surface of the Earth.
A Projected Coordinate System is used to locate objects on a flat surface, e.g. a paper map
[What are the features of a Geographic Coordinate System? How do they measure/indicate
location?] - CORRECT ANSWER - Graticule - consists of intersecting vertical and
horizontal lines, which are called longitude (meridians) and latitude (parallels) respectively.
Measurements are expressed in degrees, minutes, and seconds.
What is an attribute? - CORRECT ANSWER - Information about a geographic feature in a
GIS, generally stored in a table and linked to the feature by a unique identifier. For example,
attributes of a river might include its name, length, and average depth.
What is a class? - CORRECT ANSWER - A group or category of attribute values; a set of
entities possessing certain common attribute values.
What is a coordinate system? - CORRECT ANSWER - A reference system used to locate
geographic features on a two- or three-dimensional surface. A coordinate system is comprised of
a spheroid, datum, projection, and units. Common coordinate systems are geographic (three-
dimensional), in which locations are measured in degrees of latitude and longitude, and planar
(also called projected or Cartesian), in which the earth's surface is projected onto a two-
dimensional plane and locations are measured in meters or feet.
What is a datum? - CORRECT ANSWER - The reference specifications of a measurement
system, usually a system of coordinate positions on a surface (a horizontal datum) or heights
above or below a surface (a vertical datum).
