GIS Exam Practice Questions and Answers |100% Pass
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Course
ArcGIS Pro Foundations
Institution
ArcGIS Pro Foundations
GIS Exam Practice Questions and
Answers |100% Pass
Why can getting points from a GPS into ArcGIS be problematic? - Answer-Poor connection -
hardware and software issues; different companies/products/versions
Difficult to find the specified datum/projection
What is remote sensing? Give examples...
What is essential for defining x/y coordinates? - Answer✔✔-The poles and equator
Define datum. - Answer✔✔-A model of the earth's size/shape (ie a model of the Geoid). Applied to a
specific origin/reference point. Different datums created for places around the world. Continually refined
over time (ex: NAD 27 vs 83). Not much change in recent decades. Horizontal and Vertical datums exist
With projections, is there more distortion on small scale or large scale maps? - Answer✔✔-Small scale
maps
Projections typically only maintain 1 or 2 of what following features, and must distort at least one
feature? - Answer✔✔-Area, shape, distances, and angles
Define spherical coordinates. - Answer✔✔-Use the length of a vector originating at the ellipsoid center
to define the location on the surface
Define latitude and longitude. - Answer✔✔-Latitude: Lines running parallel east to west; Equator is the
baseline
Longitude: Lines running from pole to pole; Meridians; Greenwich (Prime) Meridian is the baseline from
which measurements are made
Define UTM. - Answer✔✔-Divides the world into 60 zones (including North and South). Each zone has an
origin based on False Easting/Northing
Describe the relationship between GIS, coordinate systems, datum and projections and what happens in
GIS when they differ. - Answer✔✔-Each layer has a coordinate system, and datum (usually projection) -
even if it is not defined. All layers on the map must be in the same system to allow them to line up
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