Final Exam

raster-network analysis

what region covers the shortest wavelengths used in remote sensing

the visible region

what is the major source of energy for remote sensing data collected from a satellite

the sun

(T/F) aerial photos are the photos taken from a satellite

false

Less than 0.4 μm

not used in remote sensing

3.0 to 100 μm

near infrared

0.7 to 3.0 μm

far infrared

1 mm to 1m

microwave

(T/F) pixel values can have decimal numbers in a floating point raster

true

(T/F) 30 meter spatial resolution raster images have a higher spatial resolution than 10 meter spatial resolution raster images

false

a remote sensing data set is basically a collection of ______ radiations recorded by the sensors in satellites, aircraft, etc.

reflected

(T/F) an area on the surface imaged by a satellite’s sensor is called a swath

true

this region of the electromagnetic spectrum represents the heat emitted from the Earth’s surface

far infrared

a system’s ability to discriminate very slight differences in energy is called _____ resolution

radiometric

expand DEM

digital elevation model

(T/F) SRTM is a global model for elevation data

true

(T/F) LIDAR data is mass point cloud dataset that can be used to create DEMs

true

(T/F) GPS readings can be used as ground control points (GCPs) in geometric transformation of a raster image

true

(T/F) digital terrain models (DTM) include heights of buildings and trees

false

remote sensing satellite series that has been providing global data since the early 1970s

LANDSAT

temporal resolution of the LANDSAT image

16 days

spatial resolution

determines the smallest object or feature that can be detected in an image

spectral resolution

the ability of a sensor to capture different wavelength intervals

georectification of satellite imagery

aligning the satellite image to a map coordinate system for accurate spatial representation

30 degree slope in percent-slope form

58

georectification

how global errors in a DEM can be corrected

if you are selecting a site for a wildlife lookout station in a national park, which terrain analysis will you use to find the area that can be seen from the lookout station

viewshed

how can relative error in a DEM be corrected

filling the DEM

(T/F) the algorithm used in calculating slope in ArcGIS is Horn Algorithm

true

(T/F) the primary input data in a terrain analysis is a Digital Elevation Model (DEM)

true

(T/F) if TIN is derived from a DEM, that TIN cannot be as accurate as the full DEM

true

when defining a stream network, if you define a threshold value of 1,000, this means ____

each cell of the network has a minimum of 1,000 contributing cells

what should be the input file used in the toolbox to calculate flow direction

filled DEM

(T/F) in the Strahler method of stream ordering in a watershed model, the stream order increases only when streams of the same order interact

true

(T/F) in an IDW interpolation technique, estimated values are always between max and min values of known points

true

spatial interpolation method that assumes any point within a Voronoi polygon is closer to the polygon’s known point than any other known points

Thiessen Polygon

the first law of geography

everything is related to everything else but near things are more related than distanced things

global interpolation technique

all points in the data are used to estimate the values of locations for which data is unavailable

positive spatial autocorrelation

if nearby or neighboring areas are alike in spatial data

(T/F) Thiessen interpolation technique is an inexact interpolation technique

false

(T/F) A Moran’s I of 0.94 and a p value of 0.0000 indicate that there is NO significant spatial autocorrelation in the data

false

G statistics

indicates clustering of high values or low values in the data; Global Statistics

hotspot analysis

computes a Z score for every point in the data set

(T/F) LISA is a global pattern analysis

false

in the below semi variogram, “A” is

nugget

universal krigging

interpolation technique that assumes that there is a drift (spatial trend) in the spatial data

Krigging

method that was initially developed to estimate the spread of Dimond mines in South Africa

regression interpolation method

the relationship between the independent and dependent variable is modeled

(T/F) when logical expressions like “&” and “or” are used in a GIS model, the output raster cells will either be 0 or 1

true

four ways to run a tool in ArcGIS

python script, ArcToolBox, standalone python script, and model builder

import arcpy

the initial command to import the ArcPy module in python for use in ArcGIS Pro

what is the main purpose of using ModelBuilder in ArcGIS Pro

to create and automate workflows without coding by visually connecting tools and data

in a turn table of network database, a turn of -90 degrees indicates _____

a right turn

speed limits in a network analysis is a ______

link impedence

a turn angle of 0 degrees in a turn table indicates _____

go straight

expand GIS

Geographic Information System, Science, Studies

(T/F) in a pure network, the flow characteristics such as speed limits, one way, etc. are included

false

(T/F) a hotspot analysis is useful in finding the optimum routing for a UPS truck to deliver the parcel in a city

false

in a turn table, -1 in a minute column indicates

the turn is prohibited

(T/F) a network analysis is a vector analysis

true

(T/F) geometric networks such as utility network allows travel in only one direction at a time

true

what is a “node” in network analysis

a point representing an intersection

what is NOT typically used in network analysis

hotspot analysis

what is the primary input required to perform a network analysis in GIS

a street network

what is “impedance” in network analysis

a resistance factor such as travel time or cost along a network

in service analysis, what does a service area represent

the regions accessible within a specified distance or time from a location

what is a multimodal network in GIS

a network that integrates multiple modes of transportation

in a transportation network, what happens if an overpass and an underpass are not properly modeled

incorrect connectivity may result, allowing unrealistic routes through intersecting pathways

what happens if a network analysis ignores turn tables

it may generate unrealistic routes that violate traffic rules or turn restrictions

(T/F) a path analysis is a raster analysis

true

(T/F) *.gdb is a file extension of a file geodatabase

true

(T/F) *.shp is file format of the shapefile

true

(T/F) vector data includes points, lines, and polygons

true