Esri ArcGIS Pro Associate Exam Test 5..docx

Esri ArcGIS Pro Associate Exam Test 5.

Discrete data - ANS >> Represents real-world features that have well defined boundaries. A discrete
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feature is distinct from the other features around it.
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Example: A river is a discrete feature: there is a distinct place where you stop being dry and begin
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getting wet.
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Continuous data - ANS >> Represents real-world features that do not have well-defined boundaries.
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Examples: Elevation, temperature, rainfall.
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There are no distinct places where the phenomena simply stop; values may change abruptly, but the
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phenomena continue to be measured.
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Hint: if it makes sense to take an average of the values, it is likely continuous data
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Geographic Coordinate System (GCS) - ANS >> Uses a spherical model to identify points or areas on
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the surface of the earth. Each coordinate system is commonly illustrated with a network of
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intersecting lines of latitude and longitude called a graticule
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Graticule - ANS >> a network of intersecting lines representing meridians (longitude) and parallels
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(latitude), on which a map or plan can be represented
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Four components of a coordinate system - ANS >> Angular units of measure
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Prime meridian: Zero value for longitude
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Spheroid: Mathematical model that estimates the size and shape of the Earth
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Datum: A frame of reference for measuring locations on the surface of the Earth. It defines the
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origin and orientation of latitude and longitude lines.
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Why are there multiple spheroids in use for geographic coordinate systems? - ANS >> The Earth's
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surface is not symmetrical, causing the semi major and semi minor axes that work for one
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geographic region to not work for another region
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Projected coordinate system - ANS >> A system that defines locations on a flat map based on x,y
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coordinates
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Projection types - ANS >> cylindrical, conic, azimuthal (planar)
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Cylindrical projection - ANS >> a map created by projecting Earth's image onto a cylinder. Meridians
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and parallels intersect at right angles, as they do on the globe
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, Conic projection - ANS >> Created by setting a cone over a globe and projecting light from the center
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of the globe onto the cone. In general, distortion increases north and south of the standard parallel
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Azimuthal/planar projection - ANS >> When projected on either of the poles, longitude lines radiate
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outward from the pole at their true angle. Latitude lines appear as a series of concentric circles.
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Most often used to map the polar regions.
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Most suitable projection for map areas that extend north-south - ANS >> Cylindrical projection
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Most suitable projection for map areas that extend east-west - ANS >> Conic projection
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Most suitable projection for map areas that have equal extent in all directions - ANS >>
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Azimuthal/planar projection
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Map properties - ANS >> Shape, area, distance, direction
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A conformal projection preserves and distorts which properties? - ANS >> Preserves shape, distorts
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area
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An equal area projection preserves and distorts which properties? - ANS >> Preserves area, distorts
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shape
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An azimuthal/planar projection preserves and distorts which properties? - ANS >> Preserves true
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scale between one or two points to every other point on the map, or along every meridian. Distance
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is correct, but distortion is constant
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An equidistant projection preserves and distorts which properties? - ANS >> Preserves direction from
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one or two points to every other pointPreserves direction from one or two points to every other
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point
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Any distance or direction measured from the center of the map will be accurate, but any distance or
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direction measured from any other point will be inaccurate
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Any distance or direction measured from the center of the map will be accurate, but any distance or
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direction measured from any other point will be inaccurate
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Compromise projection - ANS >> A projection that does not have equal area, conformal, or
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equidistant characteristics, but rather seeks to minimize and balance distortion overall.
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Geodatabase - ANS >> A database or file structure used primarily to store, query, and manipulate
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spatial data.
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Geodatabase advantages - ANS >> Centralized repository N N N N N N




Scalable data model N N




Increased data integrity N N