Rivers

Function returning data frame of rivers of the Czech Republic as sf lines. It takes a single parameter scope with default "global".

Usage

reky(scope = "global", resolution = "high")

Source

Mapový podklad – Data200, 2021 © Český úřad zeměměřický a katastrální. https://www.cuzk.cz

Arguments

scope

Should the function return all rivers, or just Vltava in Prague / Svitava & Svratka in Brno?

resolution

Should the function return high or low resolution shapefile? Allowed values are "high" (default) and "low". This parameter affects only the geometry column, all other fields remain the same.

Value

sf data frame with 3.617 rows of 4 variables + geometry:

TYP

Type of river

NAZEV

Name, with Czech accents

Navigable

Boolean indicating navigability of river.

Major

Boolean indicating one of the major rivers.

Details

Two special case scopes are defined: Praha (returning the part of Vltava in and around Prague) and Brno (returning Svitava and Svratka near and around Brno).

Due to package size constraints the data are stored externally (and a working internet connection is required to use the package).

The data is current to January 2021. Downloaded size is 4.4 MB.

Examples

library(sf)

plot(st_geometry(subset(okresy(), KOD_LAU1 == "CZ0642"))) # Brno city
#> RCzechia: using dataset stored locally in ~/.rczechia
plot(reky("Brno"), add = TRUE) # Svitava & Svratka added to Brno my city plot