isohipse

An isohipse is a line on a map that connects points of equal elevation above a reference level, typically sea level. These lines are also commonly known as contour lines. Isohipse are a fundamental tool in cartography and topography for representing the three-dimensional shape of the land on a two-dimensional surface. The closer the isohipse lines are to each other, the steeper the slope of the terrain. Conversely, widely spaced isohipse lines indicate a gentler gradient. A series of concentric, closed isohipse lines usually represents a hill or mountain, with the innermost line indicating the summit. A depression or hole is often depicted by closed isohipse lines with hachures, which are short tick marks pointing inwards. The interval between consecutive isohipse lines, known as the contour interval, is usually indicated on the map's legend and is crucial for accurately interpreting the elevation changes. The accuracy of an isohipse map depends on the quality and density of the survey data used to create it. They are essential for various applications, including land surveying, urban planning, civil engineering, hiking, and environmental studies.