![]() The dataset is organized so that each row has a Tow, a Latitude and a Longitude and is ordered by Tow and Time. Longer object length is not a multiple of shorter object length ![]() Provide approximate yet very fast distance calculations within smallĪreas (tens to a few hundred kilometres across).I am trying to use the geodist function in the gmt package along with ddply in the plyr package to calculate the distance between two sets of coordinates by a grouping variable (Tow) but am getting this message: Error: expecting result of length one, got : 8 Implemented are Haversine, Vincenty (spherical and elliptical)), theĪnd the “reference” implementation of Karneyīe used for that.) The mapbox cheap ruler Spherical and elliptical distance measures. #> 10 10Īll outputs are distances in metres, calculated with a variety of The 'cheap' measure is inaccurate over such #> large distances, you'd likely be better using a different 'measure'. ![]() ![]()
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