Question 1

Which of the following interpolation methods is not a deterministic method?&#10;A) IDW&#10;B) Kriging&#10;C) Spline&#10;D) Global Interpolation

Accepted Answer

Kriging is a geostatistical method that incorporates both the distance and the degree of variation between known data points to perform interpolation. Unlike deterministic methods such as IDW (Inverse Distance Weighting), Spline, and Global Interpolation, which rely solely on the spatial configuration of the points, Kriging considers both the spatial autocorrelation and statistical properties of the underlying data, making it a stochastic method.

Question 2

Which type of Kriging assumes the presence of a trend in the dataset?&#10;A) Polynomial&#10;B) Ordinary&#10;C) Universal&#10;D) Global

Accepted Answer

Universal Kriging assumes the presence of a trend in the dataset, allowing for modeling both the local variation and the underlying trend.

Question 3

Which is true of a local interpolation method?&#10;A) All points in the dataset are used to determine an unknown value at a particular location.&#10;B) A subset of both the closest known points to a location as well as a subset of the farthest away known points from a location are used in the interpolation process.&#10;C) Only the values of the three closest known points are used to determine the unknown value for a location.&#10;D) A small subset of known points near a location are used to determine the unknown value at that location.

Accepted Answer

Local interpolation methods use a small subset of points that are near the location of interest to estimate unknown values, rather than using all points or specific configurations of distant and near points.

Question 4

Which of the following interpolation methods uses the premise that the closer a nearby value is to a location, the more weight it contributes to calculating the value at that location?&#10;A) IDW&#10;B) Kriging&#10;C) Spline&#10;D) Global Interpolation

Accepted Answer

IDW (Inverse Distance Weighting) uses the premise that the closer a point is to the location being interpolated, the more influence it has on the interpolated value.

Question 5

The goal of spatial interpolation is:&#10;A) To determine the unknown value at a location based on known values at other locations&#10;B) To identify the points used in the IDW process&#10;C) To compute a series of unknown values based on field measurements&#10;D) To turn a point into a functional surface

Accepted Answer

Spatial interpolation aims to estimate unknown values at specific locations using known values from surrounding locations.

Question 6

Which type of spline has a tendency to produce a less smooth surface?&#10;A) Tension&#10;B) Continuous&#10;C) General&#10;D) Regularized

Accepted Answer

Tension splines are designed to allow the user to adjust the tension parameter, which can lead to less smooth surfaces if the tension is increased. This is because increasing the tension effectively pulls the curve closer to the control points, potentially creating sharper turns or less smooth transitions between points.

Question 7

Which of the following interpolation methods is inexact and used for identifying overall broad trends?&#10;A) IDW&#10;B) Kriging&#10;C) Spline&#10;D) Global Interpolation

Accepted Answer

Global Interpolation is inexact and is used for identifying overall broad trends rather than precise local details. It considers the entire dataset to generate a single surface that reflects the general pattern of the data.

Question 8

Which of the following interpolation methods tends to produce overly smooth surfaces?&#10;A) IDW&#10;B) Kriging&#10;C) Spline&#10;D) Global Interpolation

Accepted Answer

Spline interpolation tends to produce overly smooth surfaces because it fits a mathematical function (typically a polynomial) that passes through all the given points, minimizing the overall curvature of the surface. This can lead to an unrealistic representation of the surface if the actual data has abrupt changes, as the spline method will smooth these out.

Question 9

Using the polygon boundaries of states to determine statistics (such as the sum) of raster cells that fall within those boundaries is an example of which concept?&#10;A) Global interpolation&#10;B) Zonal&#10;C) Power&#10;D) Universal Kriging

Accepted Answer

Zonal statistics involve analyzing raster data within the boundaries of specified zones, in this case, the polygon boundaries of states, to calculate statistics like sums, averages, or maximum values of the raster cells within those zones.

Question 10

Which of the following interpolation methods takes statistical measures and spatial autocorrelation into account when interpolating?&#10;A) IDW&#10;B) Kriging&#10;C) Spline&#10;D) Global Interpolation

Accepted Answer

Kriging is a geostatistical interpolation method that considers both the distance and the degree of variation between known data points when estimating values in unknown areas. It uses statistical models that include spatial autocorrelation: the statistical relationship among the measured points based on the distance between them.

Question 11

Which ArcGIS Extension contains utilities for working with spatial statistics?&#10;A) Geostatistical Analyst&#10;B) Spatial Analyst&#10;C) Zonal Statistics Analyst&#10;D) Interpolation Analyst

Accepted Answer

The answer of Which ArcGIS Extension contains utilities for working...

Question 12

An interpolation method that accounts for spatial variation is:&#10;A) Variogramming&#10;B) Semivariance&#10;C) Deterministic&#10;D) Geostatistical

Accepted Answer

The answer of An interpolation method that accounts for spatial...

Question 13

Which type of spline has a tendency to produce a surface with values well outside the range of source values?&#10;A) Tension&#10;B) Continuous&#10;C) General&#10;D) Regularized

Accepted Answer

The answer of Which type of spline has a tendency...

Question 14

An interpolation method that uses a mathematical process to fit the surface exactly through the known points is:&#10;A) Tension&#10;B) Nearest Neighbor&#10;C) Spline&#10;D) Kriging

Accepted Answer

The answer of An interpolation method that uses a mathematical...

Question 15

Which of the following interpolation methods will often contain a &#34;bull's-eye&#34; effect in its resulting surface?&#10;A) IDW&#10;B) Kriging&#10;C) Spline&#10;D) Global Interpolation

Accepted Answer

The answer of Which of the following interpolation methods will...

Deck 14: How to Perform Spatial Interpolation With Arcgis Pro