Question 1

Which of the following can affect the result of watershed analysis?

Accepted Answer

A)  Flow accumulation threshold 
B)  both DEM resolution and Flow accumulation threshold 
C)  Flow direction method 
D)  DEM resolution 
E)  all of these are correct 
A)  Flow accumulation threshold 
B)  both DEM resolution and Flow accumulation threshold 
C)  Flow direction method 
D)  DEM resolution 
E)  all of these are correct

Question 2

List three parameters, which one can experiment in viewshed analysis.

Accepted Answer

In viewshed analysis, which is a method

Question 3

Define a reverse viewshed analysis.

Accepted Answer

A reverse viewshed analysis is a type of

Question 4

How can the viewing radius affect the result of a viewshed analysis?

Accepted Answer

The viewing radius, or the maximum dista

Question 5

A cell value of zero in a flow accumulation raster indicates that the cell is located on a:

Accepted Answer

A)  flat area 
B)  stream 
C)  ridge 
A)  flat area 
B)  stream 
C)  ridge

Question 6

If you have 2 observation points for a viewshed analysis, the output raster from ArcGIS will have ____different cell values:

Accepted Answer

A)  4 
B)  1 
C)  3 
D)  2 
A)  4 
B)  1 
C)  3 
D)  2

Question 7

A filled DEM means that:

Accepted Answer

A)  None of these is correct 
B)  An elevation value has been filled for each cell in the raster. 
C)  Sinks have been removed from the raster. 
D)  Cells with 'no data' have been removed from the raster. 
A)  None of these is correct 
B)  An elevation value has been filled for each cell in the raster. 
C)  Sinks have been removed from the raster. 
D)  Cells with 'no data' have been removed from the raster.

Question 8

Explain the D8 method for deriving a flow direction raster.

Accepted Answer

The D8 method for deriving a flow direct

Question 9

A threshold value is needed for converting a flow accumulation raster to a stream network raster. How should one choose the threshold value?

Accepted Answer

Choosing an appropriate threshold value

Which of the following can affect the result of watershed analysis?

List three parameters, which one can experiment in viewshed analysis.

Define a reverse viewshed analysis.

How can the viewing radius affect the result of a viewshed analysis?

A cell value of zero in a flow accumulation raster indicates that the cell is located on a:

If you have 2 observation points for a viewshed analysis, the output raster from ArcGIS will have ____different cell values:

A filled DEM means that:

Explain the D8 method for deriving a flow direction raster.

A threshold value is needed for converting a flow accumulation raster to a stream network raster. How should one choose the threshold value?

Introduction

Coordinate Systems

Vector Data Model

Raster Data Model

GIS Data Acquisition

Geometric Transformation

Spatial Data Accuracy and Quality

Attribute Data Management

Data Display and Cartography

Data Exploration

Vector Data Analysis

Raster Data Analysis

Terrain Mapping and Analysis

Spatial Interpolation

Geocoding and Dynamic Segmentation

Least Cost Path and Network Analysis

GIS Models and Modeling

Filters

Exam 14: Viewshed and Watershed Analysis

Which of the following can affect the result of watershed analysis?

List three parameters, which one can experiment in viewshed analysis.

Define a reverse viewshed analysis.

How can the viewing radius affect the result of a viewshed analysis?

A cell value of zero in a flow accumulation raster indicates that the cell is located on a:

If you have 2 observation points for a viewshed analysis, the output raster from ArcGIS will have ____different cell values:

A filled DEM means that:

Explain the D8 method for deriving a flow direction raster.

A threshold value is needed for converting a flow accumulation raster to a stream network raster. How should one choose the threshold value?

Introduction

Coordinate Systems

Vector Data Model

Raster Data Model

GIS Data Acquisition

Geometric Transformation

Spatial Data Accuracy and Quality

Attribute Data Management

Data Display and Cartography

Data Exploration

Vector Data Analysis

Raster Data Analysis

Terrain Mapping and Analysis

Spatial Interpolation

Geocoding and Dynamic Segmentation

Least Cost Path and Network Analysis

GIS Models and Modeling

Filters