GIS Flashcards
What is a geographical information system?
A computer based technology and method for collection, analysing,managing and presenting geographical data for a wide range of uses
Name FIVE areas where GIS is applied in South Africa ?
Police use it showing different crimes to protect citizens
Farmers use it to match crops to spoil,water supply,slopes
Business managers use it to plan marketing and service delivery, management of resources and the environment
City planning, engineering planning projects etc.
Your friend lives in Nompumelelo and he/she wants to start a business in the area. How can GIS be used in order to ensure the success of his/her business?
GIS can be used to plan deliveries and advertising. Future development can be predicted which will help with planning of shopping centres and parking facilities. Low income and high income areas can be detected and crime spots or safer areas
Differentiate between spatial data and non spatial data.
Spatial data: accurately linked to a point,line or area on the surface of the earth.
Non spatial data: stats and measurements linked to places.
Imagine that you are looking at a topographical map showing as a school. Give one example of possible spatial data?
Area of school, grounds, corridors, walkways,point of entrance
There are two types of data, namely spatial and attribute data. Differentiate between the two
Spatial data: information linked to a specific location through coordinates and represented by points,lines or polygons.
Attribute data: descriptive quality or characteristic
What type of spatial object is a road?
Name one attribute data that can be captured for the N3?
A) Line
B) National road, tarred road, many lanes, altitudes shown by benchmarks.
Classify the following as either spatial or attribute data.
A) a map showing housing density.
B) the shape of a ploughed field
A) attribute data
B) spatial data
How is spatial data stored?
Raster or vector
What is the difference between primary and secondary data
Primary: obtained from field work
Secondary : obtained from other sources such as textbooks,journals
Buffering can be used in many ways. Explain how buffering can be used in determining the enrolment of a school?
Demarcation of specific areas around the schools, create areas of calculated distances from each school, drawings rings around at specific distances .
Explain the term of buffering?
Name one advantage buffering for the school identified in.
1) buffering allows specific distances from a selected point.
2) a need was seen for a school and it will be supported once it is there.
What does GIS stand for?
Geographical Information system
