Submarine Cable Map Dataviz
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| library(geojsonsf) | |
| library(sf) | |
| library(rayrender) | |
| #Data source: https://github.com/telegeography/www.submarinecablemap.com | |
| cables = geojson_sf("cable-geo.json") | |
| cablescene = list() | |
| counter = 1 | |
| for(i in 1:length(cables$geometry)) { | |
| for(j in 1:length(cables$geometry[[i]])) { | |
| temp = cables$geometry[[i]][[j]] | |
| cableval = data.frame(x=sinpi(temp[,1]/180)*cospi(temp[,2]/180), | |
| y=sinpi(temp[,2]/180), | |
| z=cospi(temp[,1]/180)*cospi(temp[,2]/180)) | |
| #Don't lower start of line at the 180/0 longitude border | |
| if(abs(temp[1,1] - 180) > 0.001 && abs(temp[1,1] + 180) > 0.001) { | |
| cableval[1,] = cableval[1,] * 1/1.02 | |
| } | |
| nr = nrow(temp) | |
| #Don't lower end of line at the 180/0 longitude border | |
| if(abs(temp[nr,1] - 180) > 0.001 && abs(temp[nr,1] + 180) > 0.001) { | |
| nr = nrow(cableval) | |
| cableval[nr,] = cableval[nr,] * 1/1.02 | |
| } | |
| cablescene[[counter]] = path(cableval, width = 0.005,material=diffuse(color=cables$color[i])) | |
| counter = counter + 1 | |
| } | |
| } | |
| fullcablescene = do.call(rbind,cablescene) | |
| for(i in seq(1,720,by=1)) { | |
| group_objects(fullcablescene,scale=c(1,1,1)*1.02) %>% | |
| add_object(sphere(radius=0.99,material=diffuse(image_texture = "2k_earth_daymap.jpg"),angle=c(0,-90,0))) %>% | |
| group_objects(angle=c(0,-i/2,0)) %>% | |
| add_object(sphere(y=5,z=5,x=5,material=light(intensity = 80,color="lightblue"))) %>% | |
| add_object(sphere(y=5,z=5,x=-5,material=light(intensity = 10,color="orange"))) %>% | |
| add_object(sphere(y=-10,material=light(intensity = 3,color="white"))) %>% | |
| render_scene(samples=64,width=1200,height=1200,fov=0,aperture=0, ortho_dimensions = c(2.3,2.3), | |
| sample_method = "sobol_blue",filename=sprintf("smallcables%d.png",i)) | |
| } |
Como se puede ejecutar este archivo?
- Descarga los archivos a los que hace referencia el código R (1 archivo GeoJSON, 1 archivo JPG) usando los enlaces mencionados líneas arriba (en los comentarios)
- En el código R, ajusta la referencia de ruta de los archivos descargados (según tu definición)
- Ejecuta el código R en tu ambiente favorito (e.g, R-Studio). Prepárate para esperar. En mi caso tomó 40 horas en completar.
- La salida es grupo de imágenes PNG que visualizadas juntas pueden animarse como un video. Yo utilicé ffmpeg para hacer esa combinación.
The SFU link for the JPG doesn't work, here's the wikimedia source file.
https://upload.wikimedia.org/wikipedia/commons/c/c3/Solarsystemscope_texture_2k_earth_daymap.jpg
Hi,
I was wondering if anyone still had access to a repo of the Telegeography submarine cable map. They no longer maintain their public github as of 2 weeks ago, and I wanted to look at their source code. Thank you!
I was looking for it as well, I think you get it from the attachments here,
https://observablehq.com/@ariellemartinez/submarine-cable-map
Good Luck!
I have consolidated and modified a little there :
Some pointers for beginners to R:
- You'll need three R packages: "geojsonsf", "sf", and "rayrender"
- "sf" expects some libraries to be installed on your system, see its readme on how to do this, for example for Linux
- You'll need a Fortran compiler. If you're on Arch Linux:
pacman -S gcc-fortran - After installing R and opening its command line, install the packages with
install.packages(c("geojsonsf", "sf", "rayrender")) - Then run the script with
source("submarine_cable_map.R")
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Como se puede ejecutar este archivo?