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tmaptools (version 1.2)

read_shape: Read shape file

Description

Read an ESRI shape file. Optionally, set the current projection if it is missing.

Usage

read_shape(file, current.projection = NULL, as.sf = FALSE, ...)

Arguments

file
a shape file name (including directory)
current.projection
the current projection of the shape object, if it is missing in the shape file. See get_proj4 for options. Use set_projection to reproject the shape object.
as.sf
should the shape be returned as an sf object?
...
other parameters, such as stringsAsFactors, are passed on to readOGR

Value

shape object from class Spatial or sf if as.sf = TRUE

Details

This function is a convenient wrapper of rgdal's readOGR. It is possible to set the current projection, if it is undefined in the shape file. If a reprojection is required, use set_projection.

For the Netherlands: often, the Dutch Rijksdriehoekstelsel (Dutch National Grid) projection is provided in the shape file without proper datum shift parameters to wgs84. This functions automatically adds these parameters. See http://www.qgis.nl/2011/12/05/epsg28992-of-rijksdriehoekstelsel-verschuiving/ (in Dutch) for details.