Question 1

Which of the following is true about Thiessen polygons?

Accepted Answer

A)  Thiessen polygons do not vary in size. 
B)  Thiessen polygons are smaller in areas with denser control points. 
C)  The derivation of Thiessen polygons is based on a global method. 
D)  The derivation of Thiessen polygons is based on a mathematical model. 
A)  Thiessen polygons do not vary in size. 
B)  Thiessen polygons are smaller in areas with denser control points. 
C)  The derivation of Thiessen polygons is based on a global method. 
D)  The derivation of Thiessen polygons is based on a mathematical model.

Question 2

Describe how the semivariance can be used to quantify the spatial dependence in a data set.

Accepted Answer

Semivariance is a measure of the dispers

Question 3

Which kriging method allows the use of one or more secondary variables?

Accepted Answer

A)  block kriging 
B)  disjunctive kriging 
C)  cokriging 
D)  indicator kriging 
A)  block kriging 
B)  disjunctive kriging 
C)  cokriging 
D)  indicator kriging

Question 4

Define the elements of nugget, range, and sill in a semivariogram.

Accepted Answer

In geostatistics, a semivariogram is a t

Question 5

The accuracy of spatial interpolation can be influenced by:

Accepted Answer

A)  number of control points 
B)  all of these are correct 
C)  data-poor areas 
D)  distribution of control points 
A)  number of control points 
B)  all of these are correct 
C)  data-poor areas 
D)  distribution of control points

Question 6

Which of the following will typically result in a smooth interpolated surface?

Accepted Answer

A)  thin-plate splines 
B)  kriging 
C)  IDW 
A)  thin-plate splines 
B)  kriging 
C)  IDW

Question 7

Which of the following is not true about the inverse distance weighted (IDW) method?

Accepted Answer

A)  IDW tends to produce small, enclosed isolines. 
B)  The predicted values from IDW are always within the range of maximum and minimum values of the known points. 
C)  IDW is a local interpolation method. 
D)  None of these is correct 
A)  IDW tends to produce small, enclosed isolines. 
B)  The predicted values from IDW are always within the range of maximum and minimum values of the known points. 
C)  IDW is a local interpolation method. 
D)  None of these is correct

Question 8

Describe how a cross-validation analysis is performed.

Accepted Answer

Cross-validation analysis is a technique

Question 9

Which of the following is true about thin-plate splines for spatial interpolation?

Accepted Answer

A)  All of these are correct 
B)  Both the thin-plate splines method produces a minimum-curvature surface and and smooth isolines. 
C)  The thin-plate splines method tends to produce steep gradients (overshoots) in data-poor areas. 
D)  The thin-plate splines method produces a minimum-curvature surface. 
E)  The thin-plate splines method produces smooth isolines. 
A)  All of these are correct 
B)  Both the thin-plate splines method produces a minimum-curvature surface and and smooth isolines. 
C)  The thin-plate splines method tends to produce steep gradients (overshoots) in data-poor areas. 
D)  The thin-plate splines method produces a minimum-curvature surface. 
E)  The thin-plate splines method produces smooth isolines.

Question 10

How does universal kriging differ from ordinary kriging?

Accepted Answer

Universal kriging and ordinary kriging a

Which of the following is true about Thiessen polygons?

Describe how the semivariance can be used to quantify the spatial dependence in a data set.

Which kriging method allows the use of one or more secondary variables?

Define the elements of nugget, range, and sill in a semivariogram.

The accuracy of spatial interpolation can be influenced by:

Which of the following will typically result in a smooth interpolated surface?

Which of the following is not true about the inverse distance weighted (IDW) method?

Describe how a cross-validation analysis is performed.

Which of the following is true about thin-plate splines for spatial interpolation?

How does universal kriging differ from ordinary kriging?

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

Viewshed and Watershed Analysis

Geocoding and Dynamic Segmentation

Least Cost Path and Network Analysis

GIS Models and Modeling

Filters

Exam 15: Spatial Interpolation

Which of the following is true about Thiessen polygons?

Describe how the semivariance can be used to quantify the spatial dependence in a data set.

Which kriging method allows the use of one or more secondary variables?

Define the elements of nugget, range, and sill in a semivariogram.

The accuracy of spatial interpolation can be influenced by:

Which of the following will typically result in a smooth interpolated surface?

Which of the following is not true about the inverse distance weighted (IDW) method?

Describe how a cross-validation analysis is performed.

Which of the following is true about thin-plate splines for spatial interpolation?

How does universal kriging differ from ordinary kriging?

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

Viewshed and Watershed Analysis

Geocoding and Dynamic Segmentation

Least Cost Path and Network Analysis

GIS Models and Modeling

Filters