Ports Class. Create an object that characterizes world ports, defined as polygons enveloping AIS-based anchorages
polygons
Object of class polygonsClass
clusters
Object of class clustersClass
anchorages
Object of class points2MatrixClass
earthGeo
Object of class earthGeoClass
wpi
World Ports Index object, of class points2MatrixClass
cities1000
Geonames cities1000 object, of class points2MatrixClass
uniqueTypes
Array of vessel types, found in anchorageTypes object
types
Decomposition of anchorageTypes object into a list; each list element contains only records of a given type of vessel
country
ISO-3166 2-letter country code
counts
N*M matrix of counts, where N = number of ports, M = number of types of vessels
nearestWPI
data.frame with N rows and 2 columns; 1st - index of nearest WPI port; 2nd - distance between polygon centroid and nearest WPI port
nearestCity
data.frame with N rows and 2 columns; 1st - index of nearest city; 2nd - distance between polygon centroid and nearest city
verbose
Output progress to console
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