qc_coord_sign_test is an internal function to test if site coordinates
signs are interchanged. It's needed by
Data frame with data coming from
Folder route where the maps are stored, by default the
working directory. It must be a character object and it must end
Logical indicating if the special approach to countries having positive and negative coordinates must be used. See Special countries section for details.
Country coordinates sign is established by this function and testing if provided site coordinates are correct is made.
Same data frame provided, with a two new columns,
long_changed, two logicals indicating if the coordinates are
There are special countries where border coordinates for longitude, latitude
or both have negative and positive values. In this case, the normal approach
qc_coord_sign_test is not appropriate, and several tests involving
the internal use of
qc_check_coordinates must be made. If
special_countries = TRUE is specified, then tests are made trying to
dilucidate if only a change in the sign of one, latitude or longitude, is
needed or, in the contrary, changing both of them is needed. There is one
case that can not be covered by this approach: when changing sign of one of
the coordinates AND changing both coordinates seem to fix the issue,
as the correct option can not be assured.
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