loran_to_gps: Convert Loran-C coordinates to GPS coordinates

In cfree14/wcfish: West Coast fisheries data

Convert Loran-C coordinates to GPS coordinates

Description

This function converts Loran-C coordinates to GPS coordinates by using a ghost browser to run this NOAA conversion tool: https://apps-nefsc.fisheries.noaa.gov/loran/public/

Usage

loran_to_gps(chain, loran_x, loran_w)

Arguments

chain	Chain
loran_x	Loran-C x value
loran_w	Loran-C w value

Details

The chain must be one of the following 4-digit numbers: 5930 (Canadian E. Coast), 5990 (Canadian W. Coast), 7270 (Newfoundland E. Coast), 7960 (Gulf of Alaska), 7980 (Southeast U.S.), 8290 (N. Central U.S.), 8970 (Great Lakes), 9610 (S. Central U.S.), 9940 (Western U.S.), 9960 (Northeast U.S.), 9990 (N. Pacific).

Value

Data frame of GPS values

Examples

# Convert Loran coordinates
# The second to last value is purposefully invalid
loran_x <- c(27138, 27142, 27144, 27144)
loran_w <- c(15338, 14327, 153366, 15336)
loran_to_gps(chain=9940, loran_x=loran_x, loran_w=loran_w)

cfree14/wcfish documentation built on July 20, 2024, 7:50 p.m.