lint: Validate WKT strings

In wellknown: Convert Between 'WKT' and 'GeoJSON'

Description

Validate WKT strings

Usage

lint(str)

Arguments

str	A WKT string

Details

This function uses R regex - there's no error messages about what is wrong in the WKT.

Value

A logical (TRUE or FALSE)

Examples

lint("POINT (1 2)")
lint("POINT (1 2 3)")
lint("LINESTRING EMPTY")
lint("LINESTRING (100 0, 101 1)")
lint("MULTIPOINT EMPTY")
lint("MULTIPOINT ((1 2), (3 4))")
lint("MULTIPOINT ((1 2), (3 4), (-10 100))")
lint("POLYGON ((1 2, 3 4, 0 5, 1 2))")
lint("POLYGON((20.3 28.6, 20.3 19.6, 8.5 19.6, 8.5 28.6, 20.3 28.6))")
lint("MULTIPOLYGON (((30 20, 45 40, 10 40, 30 20)), ((15 5, 40 10, 10 20, 5 10, 15 5)))")
lint("TRIANGLE ((0 0, 0 1, 1 1, 0 0))")
lint("TRIANGLE ((0.1 0.1, 0.1 1.1, 1.1 1.1, 0.1 0.1))")
lint("CIRCULARSTRING (1 5, 6 2, 7 3)")
lint("CIRCULARSTRING (1 5, 6 2, 7 3, 5 6, 4 3)")
lint('COMPOUNDCURVE (CIRCULARSTRING (1 0, 0 1, -1 0), (-1 0, 2 0))')

Example output

Attaching package: 'wellknown'

The following object is masked from 'package:graphics':

    polygon

[1] TRUE
[1] TRUE
[1] TRUE
[1] TRUE
[1] TRUE
[1] TRUE
[1] TRUE
[1] TRUE
[1] TRUE
[1] TRUE
[1] TRUE
[1] TRUE
[1] TRUE
[1] TRUE
[1] FALSE

wellknown documentation built on May 26, 2021, 1:06 a.m.