Ocultar código
library(glue)
library(ggtext)
library(showtext)
library(terra)
library(ggspatial)
library(tidyterra)
library(tidyverse)Sitio en construcción
Víctor Gauto
15 de abril de 2025
Mapa de elevación de las islas de pingüinos del paquete palmerpenguins.

Colores.
Fuentes: Ubuntu y JetBrains Mono.
fuente <- glue(
"Datos: <span style='color:{c1};'><span style='font-family:jet;'>",
"{{<b>tidytuesdayR</b>}}</span> semana 15, ",
"<b>{{palmerpenguins}}</b>.</span>"
)
autor <- glue("<span style='color:{c1};'>**Víctor Gauto**</span>")
icon_twitter <- glue("<span style='font-family:jet;'></span>")
icon_instagram <- glue("<span style='font-family:jet;'></span>")
icon_github <- glue("<span style='font-family:jet;'></span>")
icon_mastodon <- glue("<span style='font-family:jet;'>󰫑</span>")
icon_bsky <- glue("<span style='font-family:jet;'></span>")
usuario <- glue("<span style='color:{c1};'>**vhgauto**</span>")
sep <- glue("**|**")
mi_caption <- glue(
"{fuente}<br>{autor} {sep} {icon_github} {icon_twitter} {icon_instagram} ",
"{icon_mastodon} {icon_bsky} {usuario}"
)Me interesa crear un mapa con las islas de los pingüinos.
Obtengo de Wikipedia las coordenadas de las islas Biscoe, Dream y Torgersen. Convierto a vector de puntos.
Calculo el centroide de las tres islas y creo una circunferencia alrededor. Luego, descargo un modelo de elevación de la región de interés. Guardo el ráster descargado.
Defino el estilo de la fecha que señala el Norte y el subtítulo de la figura.
Mapa.
g <- ggplot() +
geom_spatraster(data = r, interpolate = FALSE, maxcell = dim(r)[1]*dim(r)[2]) +
geom_spatvector(
data = as.lines(buf), fill = NA, color = "white", linewidth = 2
) +
geom_spatvector_label(
data = p, aes(label = isla), fill = NA, label.size = unit(0, "pt"),
family = "ubuntu", size = 5.5
) +
scale_fill_hypso_c(palette = "arctic", name = "Altura (m)") +
annotation_north_arrow(
width = unit(1.3, "cm"),
height = unit(1.6, "cm"),
location = "tr",
style = norte
) +
annotation_scale(
location = "bl", text_family = "ubuntu", height = unit(.5, "cm"),
text_cex = 1.2, bar_cols = c(c1, c2), line_col = c4
) +
coord_sf(expand = FALSE, clip = "off") +
labs(
subtitle = mi_subtitulo,
caption = mi_caption
) +
theme_void() +
theme(
plot.background = element_rect(fill = c4, color = NA),
plot.subtitle = marquee::element_marquee(
size = 22, width = 1, color = c2, lineheight = 1.3,
margin = margin(b = 10, t = 10)
),
plot.caption = element_markdown(
family = "ubuntu", color = c2, size = 15, margin = margin(t = 20, b = 10),
lineheight = 1.2, hjust = .5
),
legend.position = "inside",
legend.title = element_text(family = "ubuntu", size = 17),
legend.text = element_text(family = "jet", size = 13),
legend.position.inside = c(1, 0),
legend.justification.inside = c(.93, 0),
legend.key.height = unit(25, "pt")
)Guardo.
---
format:
html:
code-fold: show
code-summary: "Ocultar código"
code-line-numbers: false
code-annotations: false
code-link: true
code-tools:
source: true
toggle: true
caption: "Código"
code-overflow: scroll
page-layout: full
editor_options:
chunk_output_type: console
categories: ["geom_spatraster", "geom_spatvector", "geom_spatvector_label"]
execute:
eval: false
echo: true
warning: false
title: "Semana 15"
date: 2025-04-15
author: Víctor Gauto
---
Mapa de elevación de las islas de pingüinos del paquete `palmerpenguins`.

## Paquetes
```{r}
library(glue)
library(ggtext)
library(showtext)
library(terra)
library(ggspatial)
library(tidyterra)
library(tidyverse)
```
## Estilos
Colores.
```{r}
c1 <- "#2C3563"
c2 <- "#AE9E59"
c3 <- "#AEDF87"
c4 <- "white"
```
Fuentes: Ubuntu y JetBrains Mono.
```{r}
font_add(
family = "ubuntu",
regular = "././fuente/Ubuntu-Regular.ttf",
bold = "././fuente/Ubuntu-Bold.ttf",
italic = "././fuente/Ubuntu-Italic.ttf"
)
font_add(
family = "jet",
regular = "././fuente/JetBrainsMonoNLNerdFontMono-Regular.ttf"
)
showtext_auto()
showtext_opts(dpi = 300)
```
## Epígrafe
```{r}
fuente <- glue(
"Datos: <span style='color:{c1};'><span style='font-family:jet;'>",
"{{<b>tidytuesdayR</b>}}</span> semana 15, ",
"<b>{{palmerpenguins}}</b>.</span>"
)
autor <- glue("<span style='color:{c1};'>**Víctor Gauto**</span>")
icon_twitter <- glue("<span style='font-family:jet;'></span>")
icon_instagram <- glue("<span style='font-family:jet;'></span>")
icon_github <- glue("<span style='font-family:jet;'></span>")
icon_mastodon <- glue("<span style='font-family:jet;'>󰫑</span>")
icon_bsky <- glue("<span style='font-family:jet;'></span>")
usuario <- glue("<span style='color:{c1};'>**vhgauto**</span>")
sep <- glue("**|**")
mi_caption <- glue(
"{fuente}<br>{autor} {sep} {icon_github} {icon_twitter} {icon_instagram} ",
"{icon_mastodon} {icon_bsky} {usuario}"
)
```
## Datos
```{r}
tuesdata <- tidytuesdayR::tt_load(2025, 15)
```
## Procesamiento
Me interesa crear un mapa con las islas de los pingüinos.
Obtengo de Wikipedia las coordenadas de las islas [Biscoe](https://es.wikipedia.org/wiki/Islas_Biscoe), [Dream](https://en.wikipedia.org/wiki/Dream_Island) y [Torgersen](https://en.wikipedia.org/wiki/Torgersen_Island). Convierto a vector de puntos.
```{r}
p <- tribble(
~x, ~y, ~isla,
-65.5, -65.433333, "Biscoe",
-64.233333, -64.733333, "Dream",
-64.083333, -64.766667, "Torgersen"
) |>
vect(geom = c("x", "y"), crs = "EPSG:4326") |>
project("EPSG:3031")
```
Calculo el centroide de las tres islas y creo una circunferencia alrededor. Luego, descargo un modelo de elevación de la región de interés. Guardo el ráster descargado.
```{r}
cent <- as.lines(p) |>
centroids()
buf <- buffer(cent, 100000, quadsegs = 500)
r <- elevatr::get_elev_raster(
locations = sf::st_as_sf(buf),
z = 10,
clip = "locations"
) |>
rast()
writeRaster(r, "tidytuesday/2025/semana_15.tif", overwrite = TRUE)
r <- rast("tidytuesday/2025/semana_15.tif")
```
## Figura
Defino el estilo de la fecha que señala el Norte y el subtítulo de la figura.
```{r}
norte <- north_arrow_orienteering(
fill = c(c1, c2),
line_col = c4
)
mi_subtitulo <- glue(
"**Los pingüinos del reconocido conjunto de datos `palmerpenguins` provienen
de las islas** {{{c1} Biscoe}}, {{{c1} Dream}} **y** {{{c1} Torgersen}}, **en
la Antártida.**"
)
```
Mapa.
```{r}
g <- ggplot() +
geom_spatraster(data = r, interpolate = FALSE, maxcell = dim(r)[1]*dim(r)[2]) +
geom_spatvector(
data = as.lines(buf), fill = NA, color = "white", linewidth = 2
) +
geom_spatvector_label(
data = p, aes(label = isla), fill = NA, label.size = unit(0, "pt"),
family = "ubuntu", size = 5.5
) +
scale_fill_hypso_c(palette = "arctic", name = "Altura (m)") +
annotation_north_arrow(
width = unit(1.3, "cm"),
height = unit(1.6, "cm"),
location = "tr",
style = norte
) +
annotation_scale(
location = "bl", text_family = "ubuntu", height = unit(.5, "cm"),
text_cex = 1.2, bar_cols = c(c1, c2), line_col = c4
) +
coord_sf(expand = FALSE, clip = "off") +
labs(
subtitle = mi_subtitulo,
caption = mi_caption
) +
theme_void() +
theme(
plot.background = element_rect(fill = c4, color = NA),
plot.subtitle = marquee::element_marquee(
size = 22, width = 1, color = c2, lineheight = 1.3,
margin = margin(b = 10, t = 10)
),
plot.caption = element_markdown(
family = "ubuntu", color = c2, size = 15, margin = margin(t = 20, b = 10),
lineheight = 1.2, hjust = .5
),
legend.position = "inside",
legend.title = element_text(family = "ubuntu", size = 17),
legend.text = element_text(family = "jet", size = 13),
legend.position.inside = c(1, 0),
legend.justification.inside = c(.93, 0),
legend.key.height = unit(25, "pt")
)
```
Guardo.
```{r}
ggsave(
plot = g,
filename = "tidytuesday/2025/semana_15.png",
width = 30,
height = 32,
units = "cm"
)
```