lakeFetch: Function to calculate fetch along an input bearing

In lakemorpho: Lake Morphometry Metrics

Description

The function calculates the maximum in lake distance of a line along an input bearing.

Usage

lakeFetch(inLakeMorpho, bearing, addLine = T)

Arguments

inLakeMorpho	An object of lakeMorphoClass. Output of the lakeSurroundTopo function would be appropriate as input
bearing	Numeric that indicates the bearing of the desired fetch
addLine	Boolean to determine if the selected max length line should be added to the inLakeMorpho object. Defaults to True. Note that the line is returned in the same projection as the input data.

Value

Returns a numeric value indicating the length of the longest line in the lake along the input bearing. Units are the same as the input data.

References

Florida LAKEWATCH (2001). A Beginner's guide to water management - Lake Morphometry (2nd ed.). Gainesville: Florida LAKEWATCH, Department of Fisheries and Aquatic Sciences. Link

Examples

data(lakes)
lakeFetch(inputLM,45)

Example output

Loading required package: maptools
Loading required package: sp
Checking rgeos availability: TRUE
NOTE: rgdal::checkCRSArgs: no proj_defs.dat in PROJ.4 shared files
NOTE: rgdal::checkCRSArgs: no proj_defs.dat in PROJ.4 shared files
NOTE: rgdal::checkCRSArgs: no proj_defs.dat in PROJ.4 shared files
NOTE: rgdal::checkCRSArgs: no proj_defs.dat in PROJ.4 shared files
NOTE: rgdal::checkCRSArgs: no proj_defs.dat in PROJ.4 shared files
NOTE: rgdal::checkCRSArgs: no proj_defs.dat in PROJ.4 shared files
NOTE: rgdal::checkCRSArgs: no proj_defs.dat in PROJ.4 shared files
NOTE: rgdal::checkCRSArgs: no proj_defs.dat in PROJ.4 shared files
NOTE: rgdal::checkCRSArgs: no proj_defs.dat in PROJ.4 shared files
NOTE: rgdal::checkCRSArgs: no proj_defs.dat in PROJ.4 shared files
NOTE: rgdal::checkCRSArgs: no proj_defs.dat in PROJ.4 shared files
[1] 3753.523

lakemorpho documentation built on Feb. 11, 2018, 3:13 p.m.