rtide 
Introduction
rtide is an R package to calculate tide heights based on tide station
harmonics.
It includes the harmonics data for 637 US stations.
Utilisation
library(tibble)
library(rtide)
#> rtide is not suitable for navigation
data <- rtide::tide_height(
"Monterey Harbor",
from = as.Date("2016-07-13"), to = as.Date("2016-07-15"),
minutes = 10L, tz = "PST8PDT"
)
print(data)
#> # A tibble: 432 × 3
#> Station DateTime TideHeight
#> <chr> <dttm> <dbl>
#> 1 Monterey, Monterey Harbor, California 2016-07-13 00:00:00 0.514
#> 2 Monterey, Monterey Harbor, California 2016-07-13 00:10:00 0.496
#> 3 Monterey, Monterey Harbor, California 2016-07-13 00:20:00 0.481
#> 4 Monterey, Monterey Harbor, California 2016-07-13 00:30:00 0.468
#> 5 Monterey, Monterey Harbor, California 2016-07-13 00:40:00 0.457
#> 6 Monterey, Monterey Harbor, California 2016-07-13 00:50:00 0.449
#> 7 Monterey, Monterey Harbor, California 2016-07-13 01:00:00 0.443
#> 8 Monterey, Monterey Harbor, California 2016-07-13 01:10:00 0.440
#> 9 Monterey, Monterey Harbor, California 2016-07-13 01:20:00 0.439
#> 10 Monterey, Monterey Harbor, California 2016-07-13 01:30:00 0.441
#> # … with 422 more rowslibrary(ggplot2)
library(scales)ggplot(data = data, aes(x = DateTime, y = TideHeight)) +
geom_line() +
scale_x_datetime(
name = "Date",
labels = date_format("%d %b %Y", tz = "PST8PDT")
) +
scale_y_continuous(name = "Tide Height (m)") +
ggtitle("Monterey Harbour")
Installation
To install the latest release from CRAN
install.packages("rtide")To install the developmental version from GitHub
# install.packages("remotes")
remotes::install_github("poissonconsulting/rtide")Shiny
Tide heights can be also obtained using rtide through a shiny interface developed by Seb Dalgarno.
Contribution
Please report any issues.
Pull requests are always welcome.
Code of Conduct
Please note that the rtide project is released with a Contributor Code of Conduct. By contributing to this project, you agree to abide by its terms.
Inspiration
The harmonics data was converted from
https://github.com/poissonconsulting/rtide/blob/master/data-raw/harmonics-dwf-20151227-free.tar.bz2,
NOAA web site data processed by David Flater for
XTide. The code to calculate tide
heights from the harmonics is based on XTide.