What is GIS - Knowing GIS (SS)

10 important questions on What is GIS - Knowing GIS (SS)

What are the components which are included in GIS?

1. the computer system (hardware and operating system)
2. the software, spatial data, data management and analysis procedures
3. the people to operate the GIS

What is spatial data? (ruimtelijke gegevens)

spatial data is characterized by information about position, connections with other features and details of non-spatial characteristics.

What is included for the spatial data about one of happy valley's weather station?

*lattitude and longitude as a geographical reference
*connection details such as which service roads, lift and ski rails
*non-spatial data, amount of snowfall, temperature, wind speed and direction
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What is important and should be considered at the outlet of any GIS project?

the spatial referencing of spatial data is important

The traditional method of representant the geographic space occupied by spatial data is as a series of thematic layers. Give some exempels

*traditional cartografie maps
*a map for geology
*one for soils

How is spatial data represented?

Either as layers or objects and must be simplified before they can be stored on a computer

Give for the three entity types an example

*points can be used , for restaurants, rescue stations
*lines can be used, for roads, rivers
*areas can be used geographical zones like skizones

The functions that a GIS should be able to perform is?

include data input
storage
management
transformation
analysis and output

GIS analysis procedures can be divided into three types, name them ?

1.those used for storage and retrieval, for example, presetation capabilities may allow the display of a soil map of the area of interest
2.constrained queries that allow the user to look at patterns in their data
example using queries only for erodible soils
3.modelling procedures or functions for the predicatiën of what data might be at a different time and place. (which stil would be highly vulnerable to erosion in high winds.

What contain data layers normally?

they contain normally data of only one entity type: that is a point or line, or area data

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