11  Twilight label

Tip

Delete this block when you have read!

If you don’t have light data, delete this file!

• These scripts should be adapted based on your project, but the same script should run for all your tags. You can always check the original version online.
• Make sure you’ve read the GeoPressureManual, in particular the twilight labeling instructions, before running this script
• Nothing is saved at the end of the script and it is meant to be like that. Only twilight label file and config.yml should be edited. Use geopressure.R for the final run.

id <- "18LX"

knitr::opts_knit$set(root.dir = here::here())
library(GeoPressureR)
library(ggplot2)

11.1 Create tag

Make sure you have already created the label file with the “1-label.qmd” script.

tag <- tag_create(
  id,
  crop_start = config::get("tag_create", id)$crop_start,
  crop_end = config::get("tag_create", id)$crop_end,
  quiet = TRUE
) |>
  tag_label(quiet = TRUE) |>
  tag_set_map(
    extent = config::get("tag_set_map", id)$extent,
    scale = config::get("tag_set_map", id)$scale,
    known = config::get("tag_set_map", id)$known
  )

11.2 Create Twilight

Generate the twilight automatically. Check that twl_offset allows for night/day being centered on the figure, otherwise edit accordingly

tag <- twilight_create(
  tag,
  twl_offset = config::get("twilight_create", id)$twl_offset
)
plot(tag, type = "twilight")