ojrdetective.blogg.se - Contour lines show elevation on topographic maps

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If a point is halfway between two contour lines, it will be about halfway between the elevations of those two contour lines. The elevation of a point located in between two contour lines can be estimated by interpolating between the lines.

The elevation of an unlabeled contour line can be determined by knowing the contour interval and looking at adjacent contour lines. To avoid clutter, not every contour is labeled. The elevation for each contour line is sometimes marked on the line. The contour interval is the difference in elevation between adjacent contour lines.

On topographic maps, each contour line connects points at the same elevation. A portion of a topographic map, including the contour interval label. We will use many of these concepts in this module.įigure 6 shows a portion of a modern topographic map. Watch this video which explains many of the concepts of contour lines.

Define contour line and contour interval.