elevation - the vertical distance or height above a reference point, gradient - the rate of change of elevation or steepness of a slope between two points, expressed as the vertical rise divided by the horizontal distance, topographic profile - a representation of the heights and depths shown on a topographic map as though it were viewed from the side, contour line - a line on a map connecting points of equal elevation above or below a reference surface, scale - a ratio or proportion that indicates the relationship between a measurement on a map or model and the actual distance on the earth's surface, topographic map - a map that shows the relief or elevation of a landscape,

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