GEO LABS

The map shown below has a scale of 1:24,000. If a large building has a length of 150.0 feet (actual size on the ground), how many inches long would it be on the map?

0.075 inches

Using the change in elevation from Part D, calculate the straight-line gradient between placemarks G and H. Calculating the slope here is exactly the same as in geometry, divide rise over run.

0.795

The topographic map displayed below shows two marked elevations near the bottom of the map. The 266-foot elevation is slightly left of the center of the map and the 24-foot benchmark is on the right side. The distance between the two marked elevations is approximately 1.5 miles. Which of the following is the best estimate of the overall gradient of the land between them?

161 feet/mile

Locate the Starved Rock State Park, Illinois. Adjust the zoom so you can see both the lodge and Plum Island, which is northwest of the lodge. What is the approximate distance between the campground and the northwestern tip of Plum Island?

2.1 miles

A topographic map has a ratio scale of 1:250,000. One centimeter on the map equals _____ kilometers in the real world.

2.5

On this map, what is the change in elevation between two adjacent index contour lines? (Answer to the nearest foot.)

200 feet

The topographic map shown below displays the topography and bathymetry of a coastal area. What is the approximate total topographic relief represented in this map? Note: The contour interval is 20 feet.

200 feet

The compass bearing from Point A to Point B on the map below is 232°. If the magnetic declination is 14° west of true north, what is the bearing after it is corrected for magnetic declination?

246 degrees

Assuming a contour interval of 50 feet, what is the elevation of the centermost contour line in this figure? Please observe that the first contour line has an elevation of 100 feet above sea level.

300 feet

The map below shows a portion of a topographic quadrangle map. Its horizontal scale is 1:24,000. Suppose you plan to construct a topographic profile from the Puritan Mine to the Red Rover Mine with a vertical scale of one inch equals 60 feet. What will the vertical exaggeration of the topographic profile be?

33.3x`

The map below shows a portion of a topographic quadrangle map. The Red Rover Mine, which is located near the center of the map, is labeled by name and marked with a mine shaft symbol (and circled in blue). What is the elevation of the Red Rover Mine?

3360 feet

What is the change in elevation across each contour interval (i.e., between successive "regular" contours) on this map?

40 feet

A common size of U.S. Geological Survey map is a 15-minute quadrangle map, which measures 15 minutes of latitude by 15 minutes of longitude. Below you will use the latitude and longitude of one corner of a 15-minute quadrangle map to determine the latitude and longitude of another corner. Point B is located at 40° south latitude and 20° west longitude. Assuming that Point B is at the northwest corner of a 15-minute quadrangle map, what is the latitude and longitude of the southeast corner of the map?

40° 15' south latitude, 19° 45' west longitude

The latitude-longitude coordinate system provides reference lines from which to measure the location of a point on Earth's surface. For example, Point A is located at 20° north latitude and 120° west longitude. Now determine the latitude and longitude of Point B.

40° south; 20° west

In the Layers Panel on the lower right, make sure the Borders and Labels and Places boxes are checked. Using Placemark A, which of the following is the best estimate of the latitude and longitude of the park in degrees, minutes and seconds? Do not close Google Earth™ when done.

41° 18' 20 N, 88° 58' 29 W

What are the elevations of placemarks G and H respectively?

5540 feet; 5930 feet, respectively

What is the elevation of the Starved Rock State Park, Illinois? Use Placemark A as reference point. If your elevation in Google Earth™ is any unit besides feet, go to "Tools" > "Options" and change the "Unit of Measurement" unit to "Feet, Miles".

635 feet

Use the Public Land Survey System to locate the X out to three quarters. Assume that it is located in Township 1N and Range 3E.

NE ¼, NE ¼, NW ¼, Sec. 32, T1N, R3E

Which of the following statements best describes the topography around placemark A and the resulting appearance of the spacing of the contour lines on the map?

The land surface is relatively flat, and the contours are widely spaced.

Which answer most correctly describes the landform at placemark J and the appearance of the contour lines in the area?

The landform is a flat-topped hill, or peak, called a butte. The contour lines form concentric closed loops around the high point.

Which answer most correctly describes the landform at placemark I and the appearance of the contour lines in the area?

The landform is a ridge, and the contour lines form Vs that point downslope. Submit

Which was updated more recently, the topographic map or the satellite imagery? How can you tell?

The satellite imagery was updated more recently. This is evidenced by roads and buildings that appear in the satellite imagery but not on the topographic map.

In which direction do the Vs formed by the contour lines point as a stream crosses them?

Upstream

A compass direction along a line from one point to another that is expressed in degrees between 0 and 360 is a(n) ____

azimuth bearing

The difference in degrees between due north and magnetic north for a location is that location's

declination

The topographic map and orthoimage displayed below show the same area. What is an advantage of using an orthoimage combined with other data layers that a topographic map alone does not have?

details of land use are easy to see

What information do contour lines provide?

elevation above sea level

In the Universal Transverse Mercator System, the distance measured in meters from the Equator is the ______ coordinate.

northing

A digitized aerial photograph that has been corrected so that it provides a uniformly perpendicular aerial view that correlates precisely with a topographic map is a(n) _____

orthoimage

An image or data layer that has been corrected so that it has the same geometry and scale as a topographic map is a(n) _________ image or layer.

orthorectified

A compass direction along a line from one point to another that is expressed in degrees east or west or true north or south is a(n) _____

quadrant bearing

A pair of aerial photographs that can be viewed side-by-side to form a three-dimensional image is a(n) ______

stereogram

A device that can be used to overlap a pair of aerial photographs to form a three-dimensional image is a(n) _______

stereoscope

In the U.S. Public Land Survey System, the north-south squares are called ______ and the east-west squares are called _____

township ; ranges