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WorksheetsGIS (Unit-III)
Total questions: 45
Worksheet time: 23mins
Define Georeferencing?
What is the need for georeferencing in GIS?
To ensure accuracy in analysis and visualization
To ignore real-world locations and spatial data
To make the analysis and visualization less accurate
To add unnecessary complexity to the data
Define graticule.
A network of lines representing longitudes and latitudes on a map.
A type of clothing material.
A type of tropical fruit.
A type of musical instrument.
Method for representing the three-dimensional surface of the Earth on a two-dimensional plane is called __________.
Map projection
Globe conversion
2D transformation
Earth compression
What is used to specify the absolute location on the Earth's surface?
Temperature and humidity
North and south
East and west
Latitude and longitude
The vertical distance from the Equator measured in degrees.
Latitude
Altitude
Attitude
Longitude
All longitudes are great circles.
What is a Geodetic Datum?
A type of rock formation
A method for measuring time
A unit of measurement for distance
A reference system used to represent the shape and orientation of the Earth
Keyboard entry is no longer used in GIS projects.
True
False
Mention the types of analysis used with vector data.
Buffering
Overlay
Feature Manipulation
All of these
What is buffering?
Area of interest
Area of distance around an area
Area of concentration
Which of the following types of attribute tables can be joined in GIS?
Excel .XLSX
CSV
Text
All of these
What does 'WGS' in WGS84 stand for?
World Geodetic System
World Geographic System
World Geocoordinate System
World Grid System
The equipotential surface of the Earth’s gravity field that best fits, in a least squares sense, the global mean sea level is called__________.
Equator
Datum
Geoid
World Coordinate System
The entire Earth's surface is divided into zones in which type of map projection?
Polyconic projection system
Cylindrical projection
Lambert-Azimuthal equal-area projection
UTM projection
What is digitization in GIS?
What is tablet digitization in GIS?
The act of using computer drawing tools to draw feature data using remotely sensed image data is called __________.
Dissolving
Clipping
Georeferencing
Heads-up digitizing
Data Encoding means_________.
process of getting data from the computer
process of moving data into the scanner
process of getting data into the computer
All of the above
Major problems in data encoding are
Re-projection of data
Generalization of complex data
Matching and joining of adjacent map sheets
All of these
Data capture includes
Scanning
Digitizing
Data Transfer
All of these
Scanning converts paper maps into (a) format.
Scanning automatically captures
overlay
map features
sensors
All of these
The raster data are made of _____.
Images
Maps
Grid cells
None of these
Digitizing in GIS is the process of converting a hard copy or a scanned image into______.
Simple image
Raster data
Vector data
Complex data
Manual digitizers may be used in
Line mode
Area mode
Square mode
Either point or stream mode
Is it possible to add attribute data to digitized data or a shapefile?
Yes
No
Need conversion
Data (a) in GIS involves making changes or modifications to geographic data.
What are the methods to check and rectify errors in attribute data?
Impossible Values
Extreme Values
Internal Consistency
Scatter Diagram & Trend Surface
All of these
Which of the following are methods to rectify errors in the raster data model?
Filling holes and gaps
Edge smoothing and boundary simplification
Speckle removal or filtering
Erase and delete
All of these
Which of the following is not an encoding error of the vector data model?
Unclosed Polygon
Overshoot
Loop
Pseudo-nodes
Deskewing
A pseudonode is a node that can be removed from a vector dataset without affecting the topology.
Depends on the dataset
Partially true
False
True
What is generalization in GIS?
Define rubbersheeting in GIS.
A process used to align and adjust the positions of features on a map to improve accuracy
When a study area extends across two or more map sheets, small differences and mismatches may occur. For that, each map sheet would be digitized separately and then adjacent sheets joined after editing, projection, transformation, and generalization. This joining process is known as ____________.
digitization
fragmentation
edge matching
disintegration
Topological concepts include
Network, Connectivity, Containment
Area definition
Adjacency, Connectivity, Containment
Contiguity
Meta data would describe_______.
who collected a set of data
how the data was collected
when the data was collected
all of these are true
How is a globe more accurate than a map?
A globe is a three-dimensional model of the Earth, while a map is flat.
A globe can show streets and roads, but a map cannot.
A globe can show all of the continents at once, but a map cannot.
A globe can be used to navigate from one town to another, but a map cannot.
Why does distortion occur on every map?
Cartographers are politically biased.
GIS technology encourages errors.
The 3D world cannot be accurately converted to 2D.
Why does Google Maps use the Mercator projection?
Direction is easier to navigate a grid & distortion decreases when zoomed in.
The size of continents is more accurate.
It is easy to travel the Great Circle Route.
Because all of the Earth can be seen on the Mercator.
What is the primary purpose of using a GIS?
To store data in a database
To create artistic maps
To print maps for distribution
To analyze spatial data
Which of the following is a common vector data format?
PNG
Shapefile
JPEG
GeoTIFF
What does the term 'spatial analysis' refer to in GIS?
Analyzing data without considering location
Creating visual representations of data
Storing data in a database
Examining the relationships between geographic features
Which of the following is a common raster data format?
GeoTIFF
XML
Shapefile
CSV
Which type of map projection is best suited for preserving area relationships?
Mercator projection
Orthographic projection
Conic projection
Equal-area projection
