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 x 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 rows

library(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")

To install the latest developmental release from the Poisson drat repository

# install.packages("drat")
drat::addRepo("poissonconsulting")
install.packages("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.