### Bluffs, Other than Rocky

The typical representation of bluffs (other than rocky) on a topographical map.

### Rocky Bluffs

The typical representation of rocky bluffs on a topographical map.

### Clinometer

A homemade clinometer, an instrument used for measuring angles of slope.

### Contour System

In cartography, a contour line (often just called a "contour") joins points of equal elevation (height)…

### Depression Contours

The typical representation of depression contours, if otherwise ambiguous, on a topographical map.

### Inclined Plane with Force at an Angle to Plane and Base

"An inclined plane is a slope, or a flat surface, making an angle with a horizontal line...the force…

### Inclined Plane with the Force Acting Parallel to the Plane

"An inclined plane is a slope, or flat surface, making an angle with a horizontal line...the force acts…

### Glacier Contours

In cartography, a contour line (often just called a "contour") joins points of equal elevation (height)…

### Glacier Form Lines

In cartography, a contour line (often just called a "contour") joins points of equal elevation (height)…

### Hill, Black and White

The Hill sign should be used in advance of a downgrade where the length, percent of grade, horizontal…

### Hill, Color

The Hill sign should be used in advance of a downgrade where the length, percent of grade, horizontal…

### Hill, Outline

The Hill sign should be used in advance of a downgrade where the length, percent of grade, horizontal…

### Hill, Silhouette

The Hill sign should be used in advance of a downgrade where the length, percent of grade, horizontal…

### Inclined Plane

"One of the primary simple mechanical powers. The plane's surface is inclined to the horizon at any…

### Irrigation by Furrows

One way to spread water over a hillside field, "f m is the main ditch and the slope of the hill as shown…

### Roof With 30 degree Inclination for Trigonometry Triangle Problems

Roof with a slope of 30 degrees. Angle theta is the inclination to the horizontal of the line AB, drawn…

### Sand Dunes

The typical representation of sand dunes on a topographical map.

### Tilted Strata

This illustration shows a rock formation that has a tilted strata. d p is the direction of the dip.…

### Tilted Strata

This illustration shows a rock formation that has a tilted strata. a b c d represents a square block…

### Trajectory

Trajectory is the path a moving object follows through space. A trajectory can be described mathematically…

### Valley

If land falls to a minimum line with a steady slope, the land form created is called a valley.

### Inclined Plane Wedge

"This wedge is a movable inclined plane. Allows for raising great weights a short distance." —Quackenbos…