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#Cargar los paquetes tidyverse y sf que previamente han sido instalados en "Mi primer cuaderno"
library (tidyverse)
library(sf)
#Plotar las Coordenadas geograficas de Carolina del Norte separada por condados
system.file("gpkg/nc.gpkg", package = "sf") %>%
  read_sf() %>%
  st_transform(32119) %>%
  select (BIR74) %>%
  plot(graticule = TRUE, axes = TRUE)
#Leer los sf del ploter de Carolina del Norte
read_sf(system.file("gpkg/nc.gpkg", package = "sf"))
#Cargar el programa GADMTools
library(GADMTools)

Obtener datos administrativos de un pais

#Obtener los datos administrativos del pais Colombia
(COL<-gadm_sf_loadCountries(c( "COL" ), level = 0,
                             basefile = "./"))
#Plotear a Colombia
gadm_plot (COL)
#Obtener datos administrativos sobre los departamentos de Colombia
(DEPTOS <- gadm_sf_loadCountries(c("COL"), level=1,
                             basefile= "./"))
#Plotear Departamentos de Colombia
gadm_plot(DEPTOS)
#Obtener datos administrativos sobre los municipios de Colombia
(MUNI <- gadm_sf_loadCountries(c("COL"), level=2,
                             basefile="./"))
#Plotear Municipios de Colombia
gadm_plot(MUNI)

Extraccion de mi Departamento

#Plotear mi Departamento
VICH <- gadm_subset(DEPTOS, level=1, regions = "Vichada")
gadm_plot(VICH) %>% gadm_showNorth("tl") %>% gadm_showScale('bl')

Recortar un area

#Crear la caja envolvente de mi Departamento
(sbox <- gadm_getBbox(VICH))
#Estructura de nuestra caja
str(sbox)
#Recortar mi Depratamento, se usan valores > a los de la caja
(STUDY_AREA <- gadm_crop(DEPTOS, xmin=-72.1, ymin=3.71, xmax =-68.42, ymax=6.3))
#Plotear el area de estudio
gadm_plot(STUDY_AREA)

Obtencion de caracteristicas simples

#Seleccionar de todas las caracterisiticas simples de cada departamento 
DEPTOS$sf
#Instalar mapview
install.packages("mapview")
#Cargar mapview y plotear el pais con todos sus departamentos
suppressPackageStartupMessages(library(mapview))
DEPTOS$sf %>% mapview(zcol="NAME_1", legend=TRUE, col.regions=sf.colors)
#Plotear los municipios de mi Departamento
(MUNIC <- gadm_subset(MUNI, 1, "Vichada", usevar = NULL))
gadm_plot(MUNIC)

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