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Create an sf object from UTM coordinates, handling multiple zones correctly.

Source: R/create_sf_from_utm.R
create_sf_from_utm.Rd

This function takes a data frame with UTM coordinates (xcoord, ycoord) and a utmzone column, and creates an sf object with the correct CRS for each zone.

Usage

create_sf_from_utm(df, output_crs = NULL)

Arguments

df

A data frame with numeric columns xcoord (easting), ycoord (northing) and utmzone, and a character column hemisphere ("S" for the southern hemisphere; any other value is treated as northern).

output_crs

(Optional) The EPSG code or CRS string for the desired output CRS. If NULL, the CRS of the first UTM zone will be used.

Value

A single sf object, with the points of each zone transformed to output_crs.

Examples

# \donttest{
df <- data.frame(
  xcoord = c(500000, 501000),
  ycoord = c(5600000, 5601000),
  utmzone = c(32, 32),
  hemisphere = c("North", "North")
)
sf_obj <- create_sf_from_utm(df, output_crs = "EPSG:4326")
# }