Module 2 - Geodesy and Geographic Information Systems

Question 1

WGS84 is a ___ ___.

Answer 1

global datum

Question 2

NAD83 is a ___ ___.

Answer 2

local datum

Question 3

UTM stands for ___ ___ ___

Answer 3

Universal Transversal Mercator projection

Question 4

What is a data layer?

Answer 4

A data layer is a geographic representation of a specified type of object.

Question 5

What is the map component?

Answer 5

The map component is made up of the point, line, and polygon features that represent objects in the real world.

Question 6

What are attribute table components?

Answer 6

Attributes are those characteristics of interest or concern for a specified data layer. These attributes are in the form of data values collected for
objects in the real world and need to be associated with a feature on a map. The attribute table is an organized matrix within the data layer to store this data.

Question 7

Name six GIS functions.

Answer 7

1) Display of Data
2) Storage of Data
3) Retrieval of Data
4) Manipulation of Data
5) Analysis of Data
6) Presentation of Data

Question 8

What are the two data formats?

Answer 8

Vector and Raster

Question 9

What is vector data?

Answer 9

Vector data formats use vertices and segments to create points, lines, and polygons to represent objects.