QGIS MCQ EXAM QUESTIONS
WITH 100% CORRECT ANSWERS
101 QUESTIONS AND ANSWERS
What is data vs information?
Data is of little use unless transformed into information.
We transform data into information through an information system.
What is an information system?
A system used for capturing, storing, updating, manipulating and analysing (that
is all examples of data)
What is the definition for geographical information systems?
GIS is a set of tools for collecting, storing, retrieving at will, transforming, and
displaying spatial data from the real world for a particular set of purposes
-Collecting, storing, retrieving, transforming spatial data.
What is geographical information science?
GIS are tools that allow for the processing of spatial data into information,
generally information tied explicitly to, and used to make decisions about, some
portion of the Earth
-Processing of spatial data into information
What does spatial data mean?
,Information about the locations and shapes of geographic features and the
relationships between them, usually stored as coordinates and topology.
Geographic features - provide representations of the real world for quantitative
or qualitative use (RASTER)
Any data that can be mapped to a geographic location (data model)
What is the traditional QGIS cycle?
Data collection - Spatial data - Database - Data analysis/retrieval and LOOP
How is QGIS data visualised?
Data model - An abstraction of the real world (showing geographic objects,
spatial representation, attributes, portrayal and relationships).
A mathematical construct for representing geographic objects or surfaces as
thematic layers, including their spatial representation, attributes, portrayal and
relationships.
What are the two forms of spatial data?
Raster and Vector
What is a spatial entity and associated problems?
A representation of the real world
Scale - How the real world is modelled depends on the scale of the modelling
Dynamics - Real world is dynamic, forests, cities etc change.
Definition (fuzziness problems) - Some real world features do not fit into any
categories.
What is the difference between raster and vector?
Vector - Points, lines or polygons.
Extended types of vector - Networks + Contour lines
Raster - Gridded classified image (1,0,1,0)
What is the definition of a raster?
, A representation of the world as a surface divided into a grid of cells of a
uniform size.
Data can be classified as either 'continuous', or 'thematic/discrete'.
Raster data is inefficient when data is sparse or homogenous.
What is a discrete raster?
Raster that represents phoneomea with a CLEAR boundary with attributes that
are descriptions, classes or boundaries.
Land cover is an example of this - Each cell will have a different class, assumed
that the entire cell is filled with that class.
What is a continuous raster?
A raster in which cells values vary continuously to form a surface. Values exist
on a scale RELATIVE to each other. There is no random change for any reason,
no hard boundary.
Elevation, rainfall, temperatures are all examples.
What are raster bands?
-Single band or multiple band. A raster dataset can contain one or more layers
called bands
Single band - contain a single matrix of cell values e.g elevation data
Multiple band raster - contain multiple spatially coincident matrices of cell
values representing the same spatial area e.g spectral data
What is a DEM (e.g of single band)?
DIGITAL ELEVATION MODEL - Digital representation of topography.
Represented by cell based values with a single elevation (attribute) value
representing the entire area of the cell. DEM, DSM, DTM are EXCLUSIVLEY
raster.
How is multiband raster in a remote sensing context?
WITH 100% CORRECT ANSWERS
101 QUESTIONS AND ANSWERS
What is data vs information?
Data is of little use unless transformed into information.
We transform data into information through an information system.
What is an information system?
A system used for capturing, storing, updating, manipulating and analysing (that
is all examples of data)
What is the definition for geographical information systems?
GIS is a set of tools for collecting, storing, retrieving at will, transforming, and
displaying spatial data from the real world for a particular set of purposes
-Collecting, storing, retrieving, transforming spatial data.
What is geographical information science?
GIS are tools that allow for the processing of spatial data into information,
generally information tied explicitly to, and used to make decisions about, some
portion of the Earth
-Processing of spatial data into information
What does spatial data mean?
,Information about the locations and shapes of geographic features and the
relationships between them, usually stored as coordinates and topology.
Geographic features - provide representations of the real world for quantitative
or qualitative use (RASTER)
Any data that can be mapped to a geographic location (data model)
What is the traditional QGIS cycle?
Data collection - Spatial data - Database - Data analysis/retrieval and LOOP
How is QGIS data visualised?
Data model - An abstraction of the real world (showing geographic objects,
spatial representation, attributes, portrayal and relationships).
A mathematical construct for representing geographic objects or surfaces as
thematic layers, including their spatial representation, attributes, portrayal and
relationships.
What are the two forms of spatial data?
Raster and Vector
What is a spatial entity and associated problems?
A representation of the real world
Scale - How the real world is modelled depends on the scale of the modelling
Dynamics - Real world is dynamic, forests, cities etc change.
Definition (fuzziness problems) - Some real world features do not fit into any
categories.
What is the difference between raster and vector?
Vector - Points, lines or polygons.
Extended types of vector - Networks + Contour lines
Raster - Gridded classified image (1,0,1,0)
What is the definition of a raster?
, A representation of the world as a surface divided into a grid of cells of a
uniform size.
Data can be classified as either 'continuous', or 'thematic/discrete'.
Raster data is inefficient when data is sparse or homogenous.
What is a discrete raster?
Raster that represents phoneomea with a CLEAR boundary with attributes that
are descriptions, classes or boundaries.
Land cover is an example of this - Each cell will have a different class, assumed
that the entire cell is filled with that class.
What is a continuous raster?
A raster in which cells values vary continuously to form a surface. Values exist
on a scale RELATIVE to each other. There is no random change for any reason,
no hard boundary.
Elevation, rainfall, temperatures are all examples.
What are raster bands?
-Single band or multiple band. A raster dataset can contain one or more layers
called bands
Single band - contain a single matrix of cell values e.g elevation data
Multiple band raster - contain multiple spatially coincident matrices of cell
values representing the same spatial area e.g spectral data
What is a DEM (e.g of single band)?
DIGITAL ELEVATION MODEL - Digital representation of topography.
Represented by cell based values with a single elevation (attribute) value
representing the entire area of the cell. DEM, DSM, DTM are EXCLUSIVLEY
raster.
How is multiband raster in a remote sensing context?
