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Get the geometry type of features

Source: R/ddbs_ops_unary.R
ddbs_geometry_type.Rd

Returns the type of each geometry (e.g., POINT, LINESTRING, POLYGON) in the input features.

Usage

ddbs_geometry_type(x, by_feature = TRUE, conn = NULL)

Arguments

x

Input spatial data. Can be:

  • A duckspatial_df object (lazy spatial data frame via dbplyr)

  • An sf object

  • A tbl_lazy from dbplyr

  • A character string naming a table/view in conn

Data is returned from this object.

by_feature

Logical. If TRUE, the geometric operation is applied separately to each geometry. If FALSE, the geometric operation is applied to the data as a whole.

conn

A connection object to a DuckDB database. If NULL, the function runs on a temporary DuckDB database.

Value

A factor with geometry type(s)

Examples

if (FALSE) { # \dontrun{
## load package
library(duckspatial)

## read data
countries_ddbs <- ddbs_open_dataset(
  system.file("spatial/countries.geojson", 
  package = "duckspatial")
)

# option 1: passing sf objects
# Get geometry type for each feature
ddbs_geometry_type(countries_ddbs)

# Get overall geometry type
ddbs_geometry_type(countries_ddbs, by_feature = FALSE)
} # }