Intro to Maps 1
Imaginary lines running from west to east (horizontal lines), and lines running from north to south (vertical lines) on the globe.
What are latitude and longitude?
This is a special ruler used to measure ground distance on a map.
What is a bar scale?
A line indicating elevation and relief.
What are contour lines?
A set of letters and numbers specifying the location of a point to the desired position within a 100,000-meter square.
What is a grid coordinate?
A horizontal angle usually measured clockwise in degrees from a north base line.
What is an azimuth?
These maps show terrain and landforms.
What are topographical maps?
This color indicates the majority of man-made features—buildings or roads.
What is black?
The vertical distance between contour lines.
What is the contour interval?
The line of longitude that passes through Greenwich, England, designated as zero degrees longitude, and from which longitude east and west is measured.
What is the Prime Meridian?
The direction to the north magnetic pole, found with a compass.
What is magnetic north?
This map shows an area in relation to a particular type of information.
What is a thematic map?
This color identifies vegetation—woods, grasslands, brush, orchards, or vineyards
What is green?
This major terrain feature is an area of high ground.
The grid coordinate WC808512 would place you within this distance of a location.
What is 100 meters?
An imaginary line from any point on the earth’s surface to the north pole.
What is true north?
This is a network of satellites and ground stations used to determine locations by coordinates.
What is Global Positioning System? (GPS)
Positioning the map so that the map symbols fit the location of the features as they appear on the ground.
What is to 'orient'?
This terrain feature begins with high ground on three sides, and usually has a course of running water through it.
What is a valley?
This system, mainly used by the military, divides the globe into a flat grid.
What is the Universal Transverse Mercator (UTM) system?
For a grid azimuth of 64 degrees, the back azimuth would be this.
What is 244 degrees?
An explanatory description on a chart, map, or other illustration.
What is a legend?
This color identifies elevation and relief features.
What is brown?
This minor terrain feature is a short, continuous sloping line of high ground, normally jutting out from the side of a ridge.
What is a spur?
A grid coordinate with this many digits will place you within 10 meters of a location.
What is 8 digits?
You’ve measured a magnetic azimuth of 100°. If the declination diagram says the G-M angle is 20 degrees easterly, the grid azimuth is this.
What is 120 degrees?