Contour Interval On A Map

For example a course or large scale eg. This reference line is an index contour.

Get Familiar With The Brown Lines On The Topographic Maps

As noted earlier an index contour is one that is a bolder darker contour line.

Contour interval on a map. A maps legend usually identifies the contour interval on the map but sometimes only part of a map is available. Before you ever start analyzing contours you should determine the contour interval which is found in the bottom center of the map. But the stylistic possibilities with contour lines dont need to stop at contours themselves.

For instance if the map uses a 20 foot interval there are contour lines at zero 20 40 60 80 and 100 feet. Contour lines serve as starting points. When the lines are close.

For example if there was a circle and another one outside of it but the amount inside is thin. Usually there are different contour intervals for the different maps. A contour interval in surveying is the vertical distance or the difference in the elevation between the two contour lines in a topographical map.

To determine the elevation of a point on the map a. Considering the size of the area to be mapped contour intervals are assumed. For the maps on this web site however the contour interval is not listed because we only have parts of topographic maps not the whole map which would include the margin notes.

One example is an attempt at hachures. The contour interval is an even space that represents an increase in elevation. The gradient of the function is always perpendicular to the contour lines.

Knowing how to calculate the contour interval becomes a useful skill. The contour interval measurement given in the marginal information is the vertical distance between adjacent contour lines. On most maps every fifth contour line shown as a heavier or darker line is an index line or index contour.

More generally a contour line for a function of two variables is a curve connecting points where the function has the same particular value. The contour interval in a topographical map is the amount between one circle and the one inside of it. Ive been playing around with some maps that use contour lines as an intermediate step in deriving the final style while not necessarily appearing on the map themselves.

The contour interval of a contour map is the difference in elevation between successive contour lines. 124 000 contour map of many tens of square kilometers or miles might have a contour interval of 40 m. On most maps determining contour interval is easy just look in the margin of the map and find where the contour interval is printed ie.

Before the elevation of any point on the map can be determined the user must know the contour interval for the map he is using. Contour interval 20 ft. The space between contour lines on a topographical map is a contour interval.

To determine the elevation of a point you must have a reference line from which to start. When topographic maps are generated and contours created the spacing between neighboring contour lines is defined as the contour interval.

13 What Is The Contour Interval Of This Map The Contour Interval Of