Gr.11 June Exams GIS

Question 1

What are the components of GIS?

Answer 1

Hardware, software, data, people, methods

Question 2

What is primary data? Give two examples.

Answer 2

Data that is obtained directly from the source for a specific purpose (fieldwork)

E.g. Aerial photographs, satellite images

Question 3

What is attribute data?

Answer 3

Descriptive data. It refers to characteristics of a feature.

E.g. A river: it has a specific direction, velocity, flows over uneven ground, has a name, is in a particular stage, meanders etc.

Question 4

What is spatial data?

Answer 4

This identifies location of features. It is stored as co-ordinates and can be mapped.

Question 5

What is line data? Give examples

Answer 5

An individual circuit or line that carries data in a computer or communication channel

E.g. A road, contour line, river, farm boundary, power lines, row of trees, hiking trail (remember to be specific, e.g. The N2 Freeway)

Question 6

What is point data? Give examples

Answer 6

A single unit of data

E.g. A spot height, fire lookout tower, benchmark etc. (be specific)

Question 7

What is polygon data? Give examples

Answer 7

This is data that has three or more sides so it has a shape

E.g. A dam, street block, recreational zone, cultivated land

Question 8

What is raster data?

Answer 8

Consists of pixels of information

E.g. Digital aerial photographs, satellite images or scanned maps

Question 9

What is vector data?

Answer 9

Stores data as points,lines and polygons. It is useful for storing specific data like country borders and streets

Question 10

What is layering? Give five examples of layers.

Answer 10

Layers of data to are superimposed on top of each other on a map in themes,
E.g. Social factors, vegetation, infrastructure, land use zones, drainage, relief

Question 11

What is secondary data? Give two examples

Answer 11

Data collected by someone else

E.g. Maps, administrative records (any resources that were originally captured in another format and have been converted)

Question 12

What are the functions of GIS?

6

Answer 12

Collecting and capturing data
Storing and management of data
Recall and processing of data
Transforming and integration with other data
Analysis of data
Display of data as maps and information tables

Question 13

Give 3 examples of primary data

Answer 13

Aerial photographs and satellite images
Point data from surveys
Fieldwork

Question 14

Give 3 examples of secondary data

Answer 14

Paper maps
Existing digital data
Administrative records

Question 15

Give examples of possible layers in layering

5

Answer 15

Customers 
Streets
Elevation
Land usage
Parcels