Circles that pass though the center of the Earth that divide the planet into equal halves.
What are small circles?
Circles that intersect the Earth's surface and that do not pass through the center of the planet.
What is the part of the Earth's grid system that determines location north and south of the Equator?
What is the great circle that lies halfway between the North and South Poles?
What is the half of the Earth that lies north of the Equator?
the Northern Hemisphere
What is the half of the Earth that lies south of the Equator?
the Southern Hemisphere
What are parallels?
Lines of latitude
What are low latitudes?
the zone of latitude that lies between about 35° N and 35° S.
What are mid-latitudes?
The zone of latitude that lies between about 35° and 55° in both hemispheres.
What are high latitudes?
The zone of latitude that lies from about 55° to 90° in both hemispheres.
What is the part of the Earth's grid system that determines location east and west of the Prime Meridian?
What are meridians?
Lines of longitude
What is the arbitrary reference point for longitude that passes through Greenwich, England.
the Prime Meridian
What is cartography?
The design and production of maps.
What is the representation of the three-dimensional Earth on a two-dimensional surface?
What is map that maintains the correct shape of features on the Earth but distorts their relative size to one another?
A conformal projection
What is a map projection that accurately portrays size features throughout the map?
An equivalent projection
What is the distance ratio that exists between features on a map and the real world?
A Map Scale.
What is small scale map?
A map that shows a relatively large geographic area with a relatively low level of detail.
What is a large scale map?
A map that shows a relatively small geographic area with a relatively high level of detail.
What are isolines?
Lines on a map that connect data points of equal value.
What are isobars?
Isolines that connect points of equal atmospheric pressure.
What are isotherms?
Isolines that connect points of equal temperature.
What are isohyets?
Isolines that connect points of equal precipitation.
What are isopachs?
Isolines that connect points of equal sediment or rock thickness.
What are contours?
Isolines that connect points of equal elevation.
What is topography?
The shape and configuration of the Earth's surface?
What is a topographic map?
A map that displays elevation data regrading the Earth's surface.
What is the method through which information is gathered about the Earth from a distance?
What are aerial photographs?
Photographs taken of the Earth's surface from the air.
What is a sun-synchronous orbit?
A slightly inclined polar orbit that keeps pace with the Sun's westward progress as the Earth rotates, resulting in regular return intervals over every location on Earth.
What is spatial resolution?
The area on the ground that can be viewed with detail from the air or space.
What is the smallest definable area of detail on an image?
What is a geostationary orbit?
An orbit where satellites remain over the same place on earth every day: This orbit is achieved because the satellite is placed very high above the Earth and travels at the same speed as the Earth's rotation.
What is emissivity?
The amount of electromagnetic energy released by some aspect of the Earth's surface.
What is multipath error?
Disruption of the GPS signal from satellites due to obstructions such as trees and buildings.
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