Includes Chapter 1-4 concepts and vocabulary, notes on resources, and labs 1 & 2
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Creado por Shea Poage
hace casi 9 años
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Cerrar
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Creado por Shea Poage
hace casi 9 años
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Geospatial technology
GIS
Remote sensing
Satellite imagery
Aerial photography
GPS
Geospatial data
Non-spatial data
Google Earth
virtual globe
The study of geography is...
Geospatial technology includes...
True or false...Remote sensing images are typically "snapshots."
Aerial photography is from ________, satellite imagery is from _________.
True or false...geospatial dada and nonspatial data can be linked in useful ways.
True or false...environmental conditions can be monitored with remote sensing.
Homeland security GIS applications include...
Urban planners deal with...
What is the goal of GPS?
True or false...the US Dept of Labor believes that geospatial technology is an enormous growth area likely to generate many new jobs.
Example of non-spatial data...
True or false...images pulled from Google Earth are continuous.
True or false...geospatial data is location--based.
How does OCEARCH use geospatial technology?
Thoughts on volunteered geographic data...
Datum
Ellipsoid
Geoid
Geodesy
NAD27
NAD83
WGS84
Datum transformation
Geographic coordinate system
Latitude
Equator
Longitudes
Prime Meridian
DMS
DD
Great circle distance
Time zones
International Date Line
Map projection
Mercator projection
Lambert conformal conic
Transverse Mercator
UTM
UTM Zone
easting
northing
false northing
false easting
USNG
SPCS
SPCS zones
A reference surface or model of the Earth, used for plotting locations across the globe, is called a...
True or false: Lines of latitude run in an east-to-west direction around the globe.
Commonly used datums
In a Mercator projection, _______ remains intact but _______ can be grossly distorted.
True or false: Measurements made from one datum are unlikely to precisely match the measurements made from another datum
True or false: A false easting is a measurement made east or west of an imaginary meridian set up for a particular zone in the UTM system
Which US state is composed of more than one SPCS zone?
In general, GSC measurements are made in...
True or false: One datum is used for all measurements of Earth's locations
True or false: In the UTM system, each UTM zone has its own central meridian
When making measurements on a sphere, the distance between two points is referred to as the...
True or false: Earth is perfectly rounded.
Which datum is used by the Global Positioning System?
A map's distortion is minimized at...
SPCS is a coordinate system for...
Negative values can be used when making measurements _______ of the Equator and _____ of the Prime Meridian
One degree = __ minutes, one minute = __ seconds
True or false: All flat maps have some distortion built into them.
Reproject
Spatial reference
Georeferencing
Control points
RMSE
Which type of transformation entails pulling the image, often at a slant?
True or false: In general, the higher the RMSE, the better the match between the unreferenced data and the source data.
On an older printed map, the zero reference point is usually found in the...
The common areas that the unreferenced data to spatially referenced data are called...
The process of transforming all your data sets to match one spatial referencing measurement system is called...
True or false: When selecting control points, its best to cluster them near the center of the map.
True or false: In the georeferencing process, it is best if the source dsata uses a similar projection to the unreferenced data.
Which type of transformation entails altering the location and placement of a map?
If you use a photo scanner to scan an old map, then open the image in a GIS with data for the same location, the image will...
Assuming your control points are well chose, adding more points should...
True or false: Georeferencing can be used for non-map data, including unreferenced drawing and plans
In georeferencing, what is the minimum number of control points required to fit an unreferenced image to the source?
True or false: In general, it is quite easy to overlay maps created from different datums.
All of the following are poor control-point selection choices EXCEPT...
GPS
NAVSTAR GPS
GNSS
3 components of GPS
Space segment
Constellation
Control segment
User segment
Channels
Single frequency
Dual frequency
almanac
ephemeris
C/A code
P Code
Y Code
Pseudorange
Trilateration
3D trilateration
Selective availability
PDOP
multipath
DGPS
NDGPS
CORS
SBAS
WAAS
GLONASS
Galileo
Compass
EGNOS
MSAS
True or false: GPS is a "public domain" good that is free and available to everyone worldwide
A technology that uses signals broadcast from satellites to determine position and navigation on Earth is ______
What is the minimum # of satellites needed for a constellation?
The control segment of GPS is composed of a series of __________.
GPS satellites make ___ orbits around the Earth every day.
The signals containing info about the satellite's status, orbit, and location are collectively referred to as the ________.
Which of the following does not describe an attempt to make GPS more accurate?
Ephemeris errors typically introduce ______ or so of error
The European Union's version of GNSS is known as _______.
Transmission time (t) x speed of light (c) =
The original developer of NAVSTAR GPS was which county's Dept. of Defense?
Which of the following is NOT one of the 3 main/cooperating elements of GNSS?
How many points of reference (satellites) are required for you to find your exact location on Earth?
In which year was the first GPS satellite launched?
Which of the following is the most highly encrypted and secure?
True or false: Users of GPS can send info back to satellites.
