The difference in altitude between contour lines.Ī small contour interval is used in relatively flat areas, while larger contour intervals are used in variable or mountainous terrain. This dynamically adjusts the contour interval to fit the terrain in the display while maintaining standardized intervals such as 1, 5, 10, and so on. The number of contours to be generated in the display. The default isĪ value of 0 often represents mean sea level, depending on the source elevation dataset. Contours are generated above and below this value as needed toĬover the entire value range of the input raster. Smooth surface only-Smooths the input elevation layer but does not produce contours.Contour fill-Fills the area between every contour line with the quantized elevation value.Contour lines-Joins points of equal elevation to create a line representing constant elevation.
The default value is 2.5.Ī lower value produces a contour line with more granularity and less smoothing, while a higher value produces a contour line with more smoothing that appears less jagged. The amount of smoothing to apply to the contour line. The Contour Interval to 100, the Base Contour to 50, and the Z factor to 3.2808.
#Height of contour definition how to
The smoothed output layer can then be exported and input to a variety of tools in the Raster Surface toolset or a vector Contour tool.Įxample of how to adjust the function parameters to achieve a particular result, consider an input raster in WGS_84 geographic coordinatesĪnd elevation units of meters for which you want to generateĬontour lines every 100 feet with a base of 50 feet (so theĬontours will be 50 feet, 150 feet, 250 feet, and so on). When Contour Type is set to Contour smooth only, the input elevation layer is smoothed using the adaptive filter but does not produce contours. The Number of Contours parameter setting disables the Contour Interval parameter. In the dynamic mode, the approximate number of contours to be displayed is defined, and the function computes the appropriate contour interval while maintaining standardized intervals such as 1, 5, 10, and so on. The contours interval can be defined as a static value or set to be dynamic with the Number of Contours parameter, and it automatically varies based on the undulations of the terrain in the display. Use Identify to display the elevation value of the contour based on the source elevation layer, which will return the elevation of the contour, point, key features, and spot heights on the maps and images. The bold index contour has a value of two (2). The contours generated from the elevation dataset are rasters with a value of one (1). Contour labels on digital maps are often not required, and the contour layer is often used to give terrain context to underlying maps and images. The contours produced by this function are rasters and, therefore, not easily labeled. They are useful in applications such as engineering, agriculture, and water management. The creation of a contour layer as a raster product is valuable for a wide range of applications since the contours can be overlaid on a map and provide information regarding the terrain without obscuring the underlying data.
0 kommentar(er)
