readFeatureLayer: Create a sf dataframe from a (vector) feature layer

In wStockhausen/wtsGIS: Functions, Rmd scripts, and datasets to facilitate GIS operations

Create a sf dataframe from a (vector) feature layer

Description

This function reads a (vector) feature layer from a dsn and creates a simple features dataframe (using package sf).

Usage

readFeatureLayer(dsn, layer, drivers = character(0), crs = NULL)

Arguments

dsn	-data source name (interpretation varies by driver)
layer	feature layer to read (interpretation varies by driver)
drivers	RGDAL drivers to use to read feature class (limited set of short names of drivers to try; default is to try all)
crs	a sf::crs object, EPSG code, or string describing the output coordinate reference system (or NULL to keep the original)

Details

The function uses sf::st_read to read the feature layer from the dsn. If crs is NULL, the coordinate reference system for the layer is unchanged. to it.

If the layer did not have a coordinate reference system originally associated with it, then crs is used to set the sf object's coordinate reference system.

If the layer has a coordinate reference system associated with it, wtsGIS::transformCRS is used to transform/project the sf object to that represented by crs

Value

a sf::sf data.frame.

wStockhausen/wtsGIS documentation built on Aug. 23, 2023, 2:31 a.m.