first commit

Author: reginalexavier

scripts/tanaka_contour.R

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+#libraries used
+library(tanaka)
+library(raster)
+library(sf)
+library(cartography)
+
+#loading the geographics files
+mask_file <- sf::st_read("rawdata/shapes/haiti_shape.shp")
+
+raster_file <- raster::raster("rawdata/rasters/haiti_srtm_wgs_18N.tif")
+
+resample_raster <- raster::aggregate(raster_file, fact = 50, fun = mean) #resampling the raster file
+
+
+png("output/plots/haiti_TanakaContour_50.png", #creating the map file
+  width = 1200,
+  height = 850,
+  pointsize = 6,
+  res = 300
+) 
+par(mar = c(0, 0, 1, 0)) #setting the margin
+
+#tanaka contour
+tanaka::tanaka(
+  resample_raster,
+  breaks = c(seq(0, 2500, 250), 2680),
+  legend.pos = "n",
+  legend.title = "Elevation\n(meters)",
+  col = carto.pal("harmo.pal", length(c(
+    seq(0, 2500, 250), 2680
+  ))),
+  light = "#ffffff70",
+  dark = "#00000090",
+  mask = mask_file
+)
+#legend configuration
+cartography::legendChoro(
+  pos = "topleft",
+  title.txt = "Élévation\n(mètres)",
+  title.cex = 1,
+  breaks = c(seq(0, 2500, 250), 2680),
+  col = carto.pal("harmo.pal", length(c(
+    seq(0, 2500, 250), 2680
+  ))),
+  nodata = FALSE,
+  nodata.txt = "No Data",
+  frame = F
+)
+#layout part
+cartography::layoutLayer(
+  title = "\n\nHaiti (Tanaka Contours)",
+  tabtitle = TRUE,
+  frame = TRUE,
+  horiz = TRUE,
+  col = "black",
+  author = "@TRedgi, 2019",
+  sources = "Sources: NASA SRTM Version 3.0",
+  north = TRUE,
+  theme = NULL,
+  extent = NULL,
+  scale = 50
+)
+
+dev.off()