optimize tar duration

now it only takes about 4sec to run a city, if it was ever previously run (if folder & network files exist)

R/functions.R

@@ -1,11 +1,25 @@
 # functions all in one
 
+
+# select_city -------------------------------------------------------------
+
 select_city = function(CITY){
   CITY = CITY
 }
 
 
+
+# get_citylimit -----------------------------------------------------------
+
 get_citylimit = function(CITY) {
+
+  if(file.exists(paste0("outputdata/", CITY, "/CITYlimit.geojson"))){
+
+    CITYlimit = st_read(paste0("outputdata/", CITY, "/CITYlimit.geojson"), quiet = TRUE)
+
+  } else {
+
+
   MUNICIPIOSgeo = st_read("https://github.com/U-Shift/SiteSelection/releases/download/0.1/CAOP_municipios.gpkg", quiet = TRUE) # Portugal
   CITYlimit = MUNICIPIOSgeo %>%
     filter(Concelho == CITY) %>% 
@@ -20,8 +34,14 @@ get_citylimit = function(CITY) {
   }
 
   st_write(CITYlimit, paste0(output_dir, "/CITYlimit.geojson"), delete_dsn = TRUE)
+
+   }
 }
 
+
+
+# make_grid ---------------------------------------------------------------
+
 make_grid = function(CITYlimit, cellsize_input, square_input)  {
 
   CITYlimit_meters = st_transform(CITYlimit, 3857) #projected
@@ -43,8 +63,17 @@ make_grid = function(CITYlimit, cellsize_input, square_input)  {
 }
 
 
+
+# get_osm -----------------------------------------------------------------
+
 get_osm = function(CITYlimit, CITY) {
 
+ if(file.exists(paste0("outputdata/", CITY, "/road_network.gpkg"))){
+
+    road_network = st_read(paste0("outputdata/", CITY, "/road_network.gpkg"), quiet = TRUE)
+
+  } else {
+
   CITYlimit = st_read(paste0("outputdata/", CITY, "/CITYlimit.geojson"), quiet = TRUE)
   BBOX = st_as_sfc(st_bbox(CITYlimit))
 
@@ -80,11 +109,21 @@ get_osm = function(CITYlimit, CITY) {
 
   st_write(road_network, paste0("outputdata/", CITY, "/road_network.gpkg"), delete_dsn = TRUE)
 
+  }
 }
 
 
+
+# clean_osm ---------------------------------------------------------------
+
 clean_osm = function(road_network, CITY) {
 
+  if(file.exists(paste0("outputdata/", CITY, "/road_network_clean.shp"))){
+
+    road_network_clean = sf::st_read(paste0("outputdata/", CITY, "/road_network_clean.shp"), quiet = TRUE)
+
+  } else {
+
   options(qgisprocess.path="/usr/bin/qgis_process.bin")
   qgis_configure()
 
@@ -134,18 +173,30 @@ clean_osm = function(road_network, CITY) {
   # remotes::install_github("saferactive/trafficalmr")
   # road_network_clean_consolidate = road_network_clean %>% st_transform(3857) %>% trafficalmr::osm_consolidate(200)
   # osm_tags missing here, not working!
-
+
+  } 
 }
 
 
+
+# get_centrality ----------------------------------------------------------
+
 get_centrality = function(road_network_clean, CITY) {
   # road_network_clean = st_transform(road_network_clean, 3857)
 
-  # qgis_show_help("grass7:v.net.centrality")
 
-  if (file.exists(paste0("outputdata/", CITY, "/centrality_nodes.gpkg"))){
-    file.remove(paste0("outputdata/", CITY, "/centrality_nodes.gpkg"))
-  }
+  if(file.exists(paste0("outputdata/", CITY, "/centrality_nodes.gpkg"))){
+
+    centrality_nodes = sf::st_read(paste0("outputdata/", CITY, "/centrality_nodes.gpkg"), quiet = TRUE)
+
+  } else {
+
+    # if (file.exists(paste0("outputdata/", CITY, "/centrality_nodes.gpkg"))){
+    # file.remove(paste0("outputdata/", CITY, "/centrality_nodes.gpkg"))
+    # }
+
+
+  # qgis_show_help("grass7:v.net.centrality")
 
   # input = st_read(paste0("outputdata/", CITY, "/road_network_clean.shp"))
   input = road_network_clean
@@ -176,8 +227,13 @@ get_centrality = function(road_network_clean, CITY) {
 
   st_write(centrality_nodes, output_path, delete_dsn = TRUE)
 
+  }
 }
 
+
+
+# get_centrality_grid -----------------------------------------------------
+
 get_centrality_grid = function(centrality_nodes, grid) {
 
   centrality_grid = 
@@ -200,6 +256,9 @@ get_centrality_grid = function(centrality_nodes, grid) {
 }
 
 
+
+# find_candidates ---------------------------------------------------------
+
 find_candidates = function(grid, centrality_grid, CITY) {
 
   candidates_centrality = left_join(st_transform(grid, 3857), centrality_grid) 

_targets.R

@@ -6,7 +6,7 @@
 
 # Set defaults HERE ######################
 CITY_input = "Almada"
-cellsize_input = c(200, 200)
+cellsize_input = c(300, 300)
 square_input = TRUE #TRUE = squares, FALSE = hexagons
 
 

run.R

@@ -5,12 +5,12 @@
 # See https://books.ropensci.org/targets/hpc.html
 # to learn about your options.
 
-# targets::tar_visnetwork()
+targets::tar_visnetwork()
 
 targets::tar_make()
 # targets::tar_make_clustermq(workers = 2) # nolint
 # targets::tar_make_future(workers = 2) # nolint
 
 
-# tar_load(candidates_centrality)
-# mapview::mapview(candidates_centrality)
+targets::tar_load(candidates_centrality)
+mapview::mapview(candidates_centrality)