ch_contours {CSHShydRology} | R Documentation |
Create Contours
Description
Creates contour lines from a DEM.
Usage
ch_contours(dem, zmin = NULL, zmax = NULL, n_levels = 10, z_levels = NULL)
Arguments
dem |
Raster object of your dem in the desired projection (note: should have had sinks removed). |
zmin |
Minimum elevation value for contours. If not specified, minimum value dem is used. |
zmax |
Maximum elevation value for contours. If not specified, maximum value dem is used. |
n_levels |
Number of contour lines. Default is 10. |
z_levels |
Levels at which to plot contours. If specified, overrides zmin, zmax and n_levels. |
Details
Generates contour lines from a DEM, which are returned as an sf object.
The user can either provide a vector of elevation values by specifying the z_levels
argument,
or by supplying the minimum and maximum elevations (zmin
and zmax
)
and the number of contour lines (n_levels
).
Value
contours_sf |
sf object containing contours |
Author(s)
Dan Moore
Examples
# use volcano DEM
dem <- ch_volcano_raster()
# generate contours
contours <- ch_contours(dem)
# plot contours map
plot(contours)
[Package CSHShydRology version 1.4.2 Index]