Definition and Components of GIS -
correct answer ✅A geographic information system (GIS) is a
system designed to capture, store, manipulate, analyze, manage,
and present all types of geographical data.
The five components of GIS= People, Methods and procedures,
Data, Hardware, Software
What does GIS do and why is it important? -
correct answer ✅GIS integrates various information and allows us
to see the 'whole'. You can layer things like social factors,
biodiversity, engineering, land use, and environmental
considerations all on one map.
Its important because most information has spatial components
that we would like to map.
Applications of GIS -
correct answer ✅Geology, Hydrology and water quality, Business,
crime(hotspots, ranges, types), Emergency response managment,
etc....
History of GIS -
correct answer ✅-Emerged from cartography and was due to
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advances in scientific studies that increased the need from mapping
different attributes.
-Development of computers in the 1960s allowed the use of spatial
analysis and quantitative thematic mapping in solving spatial
problems.
-ESRI is the leading industry for GIS, started in 1960s
GIS Functionality -
correct answer ✅Not just mapping. GIS can help you find an
object, where something is in relation to something else, how
many, how large,
What makes up geospatial data? -
correct answer ✅Location and characteristics of spatial features.
ex. a road: where but also name length, and speed limit.
Aspatial data- only attributes
Geographic Inquiry Process -
correct answer ✅Ask a geographic question
Acquire geographic data
Explore geograaphic data
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Analyze geographic data
Act on geographic knowledge
Basic characteristics of GIS data -
correct answer ✅Represent real-world features and their
associated information with maps on a computer.
Maps portray the real world in points, lines, polygons and
annotated features.
Points- pole, bore hole, river discharge station.
Lines- river, road, rail, trail.
Polygons- village, town, land parcel.
Annotated features- labels attached to features on a map for more
specific information.
Basic Functions provided by a GIS -
correct answer ✅Data entry: Allows data entry from a variety of
sources.
Data management: Provides a means to manage data.
Thematic mapping: Displays data in map/layer form.
Data analysis: Performs data analysis functions for exploring spatial
relationships in and between map layers.
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Map layout: Provide map layout functions for creating soft and hard
copy maps.
Explain Coordinates -
correct answer ✅Define the spatial location and extent of
geographic objects
Pair of numbers that specify a location in reference to an origin
ALL SPATIAL DATA MUST HAVE COORDINATES; that's what makes it
spatial!
Describe discrete objects -
correct answer ✅Objects that exist in one place and not in another
Have identifiable boundaries & attributes
Can be present or absent=
Roads
Houses
States
Describe Continuous Data -
correct answer ✅A quantity that exists over the entire map area
Always present; changes in value from place to place (continuously
distributed)