Flashcards in Chapter 2- Vocab. Deck (25):
What is the azimuthal projection?
A map projection created by projecting Earth's surface onto a plane that touches the planet at only one point.
What is a cartographer?
A person who makes maps professionally.
What is cartography?
The art and science of making maps.
What is the conic projection?
A map projection created by extending features on Earth's curved surface onto a cone.
What is the contour interval?
The difference in elevation between adjacent contour lines on a topographic map.
What is a contour line?
Lines on a topographic map that connect points of equal elevation.
What is a coordinate system?
A system using numbers, such as x–y coordinates or latitude and longitude, to describe the location of a point on earth.
What is the cylindrical projection?
A map projection created by extending features on earth's surface onto a cylinder wrapped around earth.
What is echo sounding?
A remote sensing method that uses sound waves to determine the depth of water in oceans or lakes.
What is the electromagnetic spectrum?
The entire range of wavelengths of electromagnetic radiation from long wavelength radio waves to short wavelength x-rays and gamma rays. Also includes microwaves, infrared radiation, visible light, and ultraviolet radiation.
What is the Geographic Information System?
Computer software that can analyze data about Earth and present the data visually in the form of maps.
What is the Global Positioning System?
A commonly-used satellite navigation system used to determine locations on Earth.
What is a gradient?
A mathematical measurement of the rate of change of surface elevation, such as Earth's ground surface or a stream, over a given horizontal distance.
What is an index contour line?
A contour line with a heavier weight which makes contour lines on a topographic map easier to interpret. Usually every fourth or fifth contour line is an index contour.
What is latitude?
The location of a place described as an angle north or south of the Equator, with 0° being the Equator, and the poles being 90° north or south. Lines of latitude run parallel to the Equator.
What is longitude?
The location of the place described as an angle east or west of an arbitrary line running through Greenwich, England, called the prime meridian. Lines of longitude run all the way from one pole to the other.
What is a map legend?
A key that shows what each symbol on a map represents.
What is a map projection?
A mathematical method of distorting the curved surface of the earth so it can be portrayed on a flat surface.
What is a map scale?
The ratio between distance on a map and the corresponding distance on the ground.
What is an oblate spheroid?
A flattened sphere. Earth is an oblate spheroid because the equator has a greater radius than the measurement from the center to the pole.
What is a percent slope?
Gradient expressed as a percent. The rise over run of Earth's surface multiplied by 100.
What is the prime meridian?
The line of longitude assigned a value of zero. The currently accepted prime meridian runs through Greenwich, England.
What is remote sensing?
The collection of information about earth and its environments from a distance, usually by detecting and recording energy from the electromagnetic spectrum.
What is a scale bar?
A graphic representation of the scale of a map consisting of a line with marks like on a ruler.