ddbs_geometry_type: Get the geometry type of features

In duckspatial: R Interface to 'DuckDB' Database with Spatial Extension

Get the geometry type of features

Description

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

## Not run: 
## 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)

## End(Not run)

duckspatial documentation built on June 22, 2026, 9:08 a.m.