This data package contains two derivatives of the original CLIWOC
data product that make using it for visualisation and teaching purposes
more convenient. The derivatives are the following:
cliwoc_slim: a version of CLIWOC 2.1 including only records with a longitude and latitude, a subset of the full variable list (YR, MO, DY, HR, latitude, longitude, ID, C1), and two additional columns, date with a processed date (YR-MO-DY), and dys_since_start with the count of days elapsed since the first record. The resulting file has a substantially smaller footprint.
cliwoc_routes: a transformation of individual logs by
the same ship into a single linestring or route. Crossings of longitude
-180/180 are dealt with. In addition to the geometries, start date (start), end date (end), count of records (records), country (C1), and length of the route in days (length_days) are included.
NOTE: this product is not intended for
climatological or historical research as it makes certain assumptions
that favor visualisation. For those goals, the original CLIWOC package
is preferred.