Question 1

Rubber sheeting

Accepted Answer

A)  reproduces a map on a rubber sheet 
B)  mathematically stretches one map layer along a specific direction 
C)  mathematically stretches one map layer in all directions in order to enlarge it 
D)  geometrically adjusts map features to force a data layer to fit a base map 
A)  reproduces a map on a rubber sheet 
B)  mathematically stretches one map layer along a specific direction 
C)  mathematically stretches one map layer in all directions in order to enlarge it 
D)  geometrically adjusts map features to force a data layer to fit a base map D

Question 2

To digitise a paper map, one first needs to establish control points. The control points may be

Accepted Answer

A)  road intersections 
B)  points on soil boundaries 
C)  points on contour lines 
D)  centre points of water bodies 
E)  all of the above 
A)  road intersections 
B)  points on soil boundaries 
C)  points on contour lines 
D)  centre points of water bodies 
E)  all of the above A

Question 3

Which of the following is correct?

Accepted Answer

A)  Direct transfer of spatial data allows the data to be edited. 
B)  Direct transfer of spatial data is the main means of importing data with complex data formats. 
C)  Direct transfer of spatial data allows the non-native data to be translated on the fly. 
D)  Direct transfer of spatial data does not allow the non-native data to be translated on the fly. 
A)  Direct transfer of spatial data allows the data to be edited. 
B)  Direct transfer of spatial data is the main means of importing data with complex data formats. 
C)  Direct transfer of spatial data allows the non-native data to be translated on the fly. 
D)  Direct transfer of spatial data does not allow the non-native data to be translated on the fly. C

Question 4

Georeferencing an image in GIS involves

Accepted Answer

A)  selecting at least three control points 
B)  mathematically establishing linear or non-linear relationships between image coordinates and real-world coordinates 
C)  transforming the image so that each location on the image can be defined in real-world coordinates 
D)  all of the above 
A)  selecting at least three control points 
B)  mathematically establishing linear or non-linear relationships between image coordinates and real-world coordinates 
C)  transforming the image so that each location on the image can be defined in real-world coordinates 
D)  all of the above

Question 5

The accuracy of soil classification on a soil map can be assessed using

Accepted Answer

A)  RMSE 
B)  cross-tabulation 
C)  standard deviation 
D)  mean 
A)  RMSE 
B)  cross-tabulation 
C)  standard deviation 
D)  mean

Question 6

High accuracy implies high precision and vice versa

Accepted Answer

A) True 
 B)False

Question 7

Raster data can be captured

Accepted Answer

A)  by means of remote sensing 
B)  by means of GNSS 
C)  through on-screen digitising 
D)  through tablet digitising 
A)  by means of remote sensing 
B)  by means of GNSS 
C)  through on-screen digitising 
D)  through tablet digitising

Question 8

Spatial data accuracy refers to

Accepted Answer

A)  how close the spatial data are to a true representation of reality 
B)  how much detail the spatial data contain about the geographical features 
C)  how much bias is contained in the spatial data 
D)  what level of detail at which the spatial data are recorded 
A)  how close the spatial data are to a true representation of reality 
B)  how much detail the spatial data contain about the geographical features 
C)  how much bias is contained in the spatial data 
D)  what level of detail at which the spatial data are recorded

Question 9

The accuracy of vector data captured through digitising is independent of

Accepted Answer

A)  the number of the points selected to approximate the shape of the features 
B)  the number of the geographical features selected to digitise from the original map 
C)  the density of the points selected to approximate the shape of the features 
D)  the accuracy of the individual points selected to approximate the shape of the features 
E)  the accuracy of the original map 
A)  the number of the points selected to approximate the shape of the features 
B)  the number of the geographical features selected to digitise from the original map 
C)  the density of the points selected to approximate the shape of the features 
D)  the accuracy of the individual points selected to approximate the shape of the features 
E)  the accuracy of the original map

Question 10

Slivers are long and narrow polygons generated when

Accepted Answer

A)  overlaying two layers with some common boundaries that were digitised separately 
B)  producing buffers around area features 
C)  digitising river banks 
D)  digitising long and narrow area features 
A)  overlaying two layers with some common boundaries that were digitised separately 
B)  producing buffers around area features 
C)  digitising river banks 
D)  digitising long and narrow area features

Question 11

An affine transformation requires a minimum of

Accepted Answer

A)  3 control points 
B)  6 control points 
C)  9 control points 
D)  10 control points 
A)  3 control points 
B)  6 control points 
C)  9 control points 
D)  10 control points

Question 12

Lineage of a spatial dataset does not describe

Accepted Answer

A)  the scale of its source data 
B)  the date of its source data 
C)  the data capture and processing methods 
D)  the layout of its source maps 
A)  the scale of its source data 
B)  the date of its source data 
C)  the data capture and processing methods 
D)  the layout of its source maps

Question 13

The accuracy of the air temperature data recorded at a number of geographically distributed meteorological stations can be assessed using

Accepted Answer

A)  RMSE 
B)  cross-tabulation 
C)  standard deviation 
D)  mean 
A)  RMSE 
B)  cross-tabulation 
C)  standard deviation 
D)  mean

Question 14

The positional accuracy of a point feature is associated with

Accepted Answer

A)  errors in its recorded x coordinate 
B)  errors in its recorded y coordinate 
C)  errors in its recorded z coordinate 
D)  all the above 
A)  errors in its recorded x coordinate 
B)  errors in its recorded y coordinate 
C)  errors in its recorded z coordinate 
D)  all the above

Question 15

Manual digitising is a significant source of errors in spatial data. But which of the following is not typically an error from manual digitising?

Accepted Answer

A)  undershoot and overshoot 
B)  spikes 
C)  displacement 
D)  incomplete areal coverage 
E)  knot 
A)  undershoot and overshoot 
B)  spikes 
C)  displacement 
D)  incomplete areal coverage 
E)  knot

Question 16

With the classification error matrix below, what is the overall accuracy of the land use classification?
$\begin{array}{|l|l|l|l|l|}
\hline & \text { Urban } & \text { Forest } & \text { Cropland } & \text { Total } \
\hline \text { Urban } & 7 & 2 & 1 & 10 \
\hline \text { Forest } & 2 & 25 & 8 & 35 \
\hline \text { Cropland } & 3 & 1 & 51 & 55 \
\hline \text { Total } & 12 & 28 & 60 & 100 \
\hline
\end{array}$

Accepted Answer

A)  100% 
B)  27.7% 
C)  29% 
D)  83% 
A)  100% 
B)  27.7% 
C)  29% 
D)  83%

Question 17

Digitising is the process of

Accepted Answer

A)  entering the coordinates of a number of point features into a GIS via keyboard 
B)  converting paper maps or images to digital vector data 
C)  capturing vector data using GPS 
D)  collecting vector data through crowdsourcing 
A)  entering the coordinates of a number of point features into a GIS via keyboard 
B)  converting paper maps or images to digital vector data 
C)  capturing vector data using GPS 
D)  collecting vector data through crowdsourcing

Question 18

Vector to raster conversion may cause loss of information because

Accepted Answer

A)  small polygons could be lost 
B)  a point feature can only be represented using a single grid cell 
C)  real-world locations of geographical features can no longer be determined 
D)  measurement becomes inaccurate 
A)  small polygons could be lost 
B)  a point feature can only be represented using a single grid cell 
C)  real-world locations of geographical features can no longer be determined 
D)  measurement becomes inaccurate

Question 19

The positional accuracy of a line feature is associated with

Accepted Answer

A)  errors in the locations of the individual points selected to represent the feature 
B)  errors in locating well-defined points along the line feature 
C)  both a) and b) 
D)  neither a) nor b) 
A)  errors in the locations of the individual points selected to represent the feature 
B)  errors in locating well-defined points along the line feature 
C)  both a) and b) 
D)  neither a) nor b)

Question 20

The quality of data produced from an overlay procedure is

Accepted Answer

A)  as good as the best data input to the process 
B)  as good as the worst data input to the process 
C)  better than the best data input to the process 
D)  irrelevant to the input data 
A)  as good as the best data input to the process 
B)  as good as the worst data input to the process 
C)  better than the best data input to the process 
D)  irrelevant to the input data

Rubber sheeting

To digitise a paper map, one first needs to establish control points. The control points may be

Which of the following is correct?

Georeferencing an image in GIS involves

The accuracy of soil classification on a soil map can be assessed using

High accuracy implies high precision and vice versa

Raster data can be captured

Spatial data accuracy refers to

The accuracy of vector data captured through digitising is independent of

Slivers are long and narrow polygons generated when

An affine transformation requires a minimum of

Lineage of a spatial dataset does not describe

The accuracy of the air temperature data recorded at a number of geographically distributed meteorological stations can be assessed using

The positional accuracy of a point feature is associated with

Manual digitising is a significant source of errors in spatial data. But which of the following is not typically an error from manual digitising?

With the classification error matrix below, what is the overall accuracy of the land use classification? Urban Forest Cropland Total Urban 7 2 1 10 Forest 2 25 8 35 Cropland 3 1 51 55 Total 12 28 60 100

Digitising is the process of

Vector to raster conversion may cause loss of information because

The positional accuracy of a line feature is associated with

The quality of data produced from an overlay procedure is

GIS Overview

Spatial Data and Data Management

Spatial Analysis

Spatial Data Exploration With Statistics

Remote Sensing Data Analysis

Terrain Analysis

Spatial Visualisation

Spatial Modeling and Decision Analysis

Environmental Applications of GIS

Filters

Exam 3: Spatial Data Input and Manipulation

Rubber sheeting

To digitise a paper map, one first needs to establish control points. The control points may be

Which of the following is correct?

Georeferencing an image in GIS involves

The accuracy of soil classification on a soil map can be assessed using

High accuracy implies high precision and vice versa

Raster data can be captured

Spatial data accuracy refers to

The accuracy of vector data captured through digitising is independent of

Slivers are long and narrow polygons generated when

An affine transformation requires a minimum of

Lineage of a spatial dataset does not describe

The accuracy of the air temperature data recorded at a number of geographically distributed meteorological stations can be assessed using

The positional accuracy of a point feature is associated with

Manual digitising is a significant source of errors in spatial data. But which of the following is not typically an error from manual digitising?

With the classification error matrix below, what is the overall accuracy of the land use classification? Urban Forest Cropland Total Urban 7 2 1 10 Forest 2 25 8 35 Cropland 3 1 51 55 Total 12 28 60 100

Digitising is the process of

Vector to raster conversion may cause loss of information because

The positional accuracy of a line feature is associated with

The quality of data produced from an overlay procedure is

GIS Overview

Spatial Data and Data Management

Spatial Analysis

Spatial Data Exploration With Statistics

Remote Sensing Data Analysis

Terrain Analysis

Spatial Visualisation

Spatial Modeling and Decision Analysis

Environmental Applications of GIS

Filters