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Get CRS from a SedonaDB view or sedonadb_dataframe

Source: R/sx_crs.R
sx_crs.Rd

Extracts the Coordinate Reference System (CRS) from a SedonaDB view name or sedonadb_dataframe by reading the Arrow schema metadata.

This function returns a standard sf::crs object, ensuring full compatibility with the sf ecosystem.

Usage

sx_crs(x, verbosity = NULL)

Arguments

x

A sedonadb_dataframe, sf object, or view name (character) in SedonaDB for which to extract the CRS.

verbosity

Character or NULL. Controls message output for this function call.

  • "quiet": Suppress all informational messages.

  • "info": Show standard progress and status messages.

  • "debug": Show additional diagnostic messages for troubleshooting.

If NULL (the default), uses the global sx.verbosity option. See sx_options() for persistent configuration.

Value

An object of class crs (from the sf package).

Examples

# \donttest{
x <- sx_read(system.file("shape/nc.shp", package = "sf"), quiet = TRUE)
sx_crs(x)
#> Coordinate Reference System:
#>   User input: EPSG:4267 
#>   wkt:
#> GEOGCRS["NAD27",
#>     DATUM["North American Datum 1927",
#>         ELLIPSOID["Clarke 1866",6378206.4,294.978698213898,
#>             LENGTHUNIT["metre",1]]],
#>     PRIMEM["Greenwich",0,
#>         ANGLEUNIT["degree",0.0174532925199433]],
#>     CS[ellipsoidal,2],
#>         AXIS["geodetic latitude (Lat)",north,
#>             ORDER[1],
#>             ANGLEUNIT["degree",0.0174532925199433]],
#>         AXIS["geodetic longitude (Lon)",east,
#>             ORDER[2],
#>             ANGLEUNIT["degree",0.0174532925199433]],
#>     USAGE[
#>         SCOPE["Geodesy."],
#>         AREA["North and central America: Antigua and Barbuda - onshore. Bahamas - onshore plus offshore over internal continental shelf only. Belize - onshore. British Virgin Islands - onshore. Canada onshore - Alberta, British Columbia, Manitoba, New Brunswick, Newfoundland and Labrador, Northwest Territories, Nova Scotia, Nunavut, Ontario, Prince Edward Island, Quebec, Saskatchewan and Yukon - plus offshore east coast. Cuba - onshore and offshore. El Salvador - onshore. Guatemala - onshore. Honduras - onshore. Panama - onshore. Puerto Rico - onshore. Mexico - onshore plus offshore east coast. Nicaragua - onshore. United States (USA) onshore and offshore - Alabama, Alaska, Arizona, Arkansas, California, Colorado, Connecticut, Delaware, Florida, Georgia, Idaho, Illinois, Indiana, Iowa, Kansas, Kentucky, Louisiana, Maine, Maryland, Massachusetts, Michigan, Minnesota, Mississippi, Missouri, Montana, Nebraska, Nevada, New Hampshire, New Jersey, New Mexico, New York, North Carolina, North Dakota, Ohio, Oklahoma, Oregon, Pennsylvania, Rhode Island, South Carolina, South Dakota, Tennessee, Texas, Utah, Vermont, Virginia, Washington, West Virginia, Wisconsin and Wyoming - plus offshore . US Virgin Islands - onshore."],
#>         BBOX[7.15,167.65,83.17,-47.74]],
#>     ID["EPSG",4267]]
# }