diff --git a/NetworkGenerator.R b/NetworkGenerator.R
index 1d07c57..684ea1b 100644
--- a/NetworkGenerator.R
+++ b/NetworkGenerator.R
@@ -7,7 +7,7 @@ makeNetwork<-function(outputFileName="test"){
   city = "Melbourne"
   # city = "Brisbane"
   # city = "Munich"
-  
+
   # City parameters to be set
   # •	outputCrs: desired coordinate system for network
   # •	osmExtract: if 'processOsm=T', OSM extract file in .osm format (.osm.pbf 
@@ -24,7 +24,7 @@ makeNetwork<-function(outputFileName="test"){
   #   coordinate system as network)
   # •	gtfs_feed: if 'addGtfs=T' or 'addDestinationLayer=T, zip file containing 
   #   GTFS data (and, if 'addGtfs=T', also set start and end dates in GTFS section)
-  
+
   if (city == "Melbourne") {
     outputCrs = 28355
     osmExtract = "./data/melbourne.osm"
@@ -34,7 +34,7 @@ makeNetwork<-function(outputFileName="test"){
     osmPbfExtract = "./data/melbourne_australia.osm.pbf"
     ndviFile = "./data/NDVI_1600mBuffer_Melbourne_reprojected.tif"
     gtfs_feed = "./data/gtfs.zip"
-    
+
   } else if (city == "Brisbane") {
     outputCrs = 28356
     osmExtract = ""  # must set 'processOsm=F'
@@ -54,7 +54,6 @@ makeNetwork<-function(outputFileName="test"){
     osmPbfExtract = "./data/munich_germany.osm.pbf"
     ndviFile = ""  # must set 'addNDVI=F'
     gtfs_feed = "./data/mvv_gtfs.zip" # to test; if not then >> # must set 'addGtfs=F' and 'addDestinationLayer=F'
-    
   }
 
   # INPUT NETWORK 
diff --git a/functions/addDestinations.R b/functions/addDestinations.R
index bbe9d57..522c239 100644
--- a/functions/addDestinations.R
+++ b/functions/addDestinations.R
@@ -12,7 +12,7 @@ addDestinations <- function(nodes_current,
                             city, 
                             gtfs_feed,
                             outputCrs) {
-  
+
   # nodes_current = networkDensified[[1]]
   # edges_current = networkDensified[[2]]
   # osmPbfExtract = "./data/melbourne_australia.osm.pbf"
@@ -103,7 +103,7 @@ addDestinations <- function(nodes_current,
   # and store area and location details
   destination.pt <- 
     bind_rows(destination.layer(points),
-              
+
               # # add stations (from point, polygons and lines) to point table
               # getStation(points, polygons, lines) %>% 
               # mutate(dest_type = "railway_station")) %>%
@@ -127,6 +127,9 @@ addDestinations <- function(nodes_current,
   # Remove any invalid polygons as they may cause errors
   destination.poly <- destination.poly[which(st_is_valid(destination.poly$geometry)), ]
   
+  # Remove any invalid polygons as they may cause errors
+  destination.poly <- destination.poly[which(st_is_valid(destination.poly$geometry)), ]
+  
   # # check numbers of each destination type
   # chk <- full_join(destination.poly %>%
   #                    st_drop_geometry() %>%
diff --git a/functions/addNDVI.R b/functions/addNDVI.R
index c9f077f..b730c7e 100644
--- a/functions/addNDVI.R
+++ b/functions/addNDVI.R
@@ -41,7 +41,7 @@ addNDVI2Links <- function(links, ndviFile, ndviBuffDist) {
     mutate(row_no = row_number()) %>%
     left_join(., ndvi_values_mean, by = c("row_no" = "ID")) %>%
     dplyr::select(-row_no)
-  
+
   # st_write(links.with.ndvi, "./SP_working/links_with_NDVI.sqlite", delete_layer = TRUE)
 
   return(links.with.ndvi)
diff --git a/functions/getDestinationTypes.R b/functions/getDestinationTypes.R
index 35b0278..9570e17 100644
--- a/functions/getDestinationTypes.R
+++ b/functions/getDestinationTypes.R
@@ -125,7 +125,6 @@ getCafe <- function(layer) {
   return(layer %>% filter(amenity == "cafe"))
 }
 
-
 # 8 parking ----
 getParking <- function(layer) {
   return(layer %>% filter(amenity == "parking" &