validate_wkt takes a vector of WKT objects and validates
them, returning a data.frame containing the status of each entry and
(in the case it cannot be parsed) any comments as to what, in particular,
may be wrong with it. It does not, unfortunately, check whether the
object meets the WKT spec - merely that it is formatted correctly.
a character vector of WKT objects.
a data.frame of two columns,
FALSE values for whether the WKT object is parseable and
comments (containing any error messages
in the case that the WKT object is not). If the objects are simply NA,
both fields will contain NA.
wkt_correct() for correcting WKT objects
that fail validity checks due to having a non-default orientation.
wkt <- c("POLYGON ((30 10, 40 40, 20 40, 10 20, 30 10))", "ARGHLEFLARFDFG", "LINESTRING (30 10, 10 90, 40 some string)") validate_wkt(wkt)#> is_valid #> 1 FALSE #> 2 FALSE #> 3 FALSE #> comments #> 1 The WKT object has a different orientation from the default. Use ?wkt_correct to fix. #> 2 Object could not be recognised as a supported WKT type #> 3 bad lexical cast: source type value could not be interpreted as target at 'some' in 'linestring (30 10, 10 90, 40 some string)'