Understanding Slope Measurement: Grade, Mils, Degrees, and Gradient Explained #3904108 (License: Personal Use)

The image displays a topographic projection of points A and B with contour lines (210-250 ft), followed by four vertical profiles showing different slope expressions: 26.80% grade over 100 units, 268 mils over 1000 units, +15° to -15° angular change over 57.3 units, and a 26.80:1 gradient over 3.7 units. Each profile includes ground surface elevation rise and horizontal distance, clarifying how the same physical slope can be quantified in multiple standardized units used across civil engineering, military navigation, and land surveying.

Used in geospatial education, surveying manuals, civil engineering textbooks, and GIS training materials to teach slope representation. Matches user intent for understanding how to convert between slope units or interpret topographic maps accurately.