22 testing removedangles

DESCRIPTION

@@ -26,7 +26,7 @@ Imports:
     dbscan,
     purrr,
     units,
-    rlang,
+    rlang
 Suggests: 
     tibble,
     tmaptools,
@@ -35,4 +35,6 @@ Suggests:
 Encoding: UTF-8
 LazyData: true
 Roxygen: list(markdown = TRUE)
-RoxygenNote: 7.3.1
+RoxygenNote: 7.3.2
+Additional_repositories: https://josiahparry.r-universe.dev
+

R/corenet.R

@@ -580,6 +580,22 @@ removeDangles = function(network, tolerance = 0.001) {
 }
 
 
+removeDangles_geos = function(network, tolerance = 0.001, tol_distance) {
+  network = geos::as_geos_geometry(central_leeds_osm)
+  network_linestring = geos::geos_unnest(network, keep_multi = FALSE)
+  coordinates_start = geos::geos_point_start(network_linestring)
+  coordinates_end = geos::geos_point_end(network_linestring)
+  coordinates = c(coordinates_start, coordinates_end)
+  coordinates_matrix = data.frame(
+    x = geos::geos_x(coordinates),
+    y = geos::geos_y(coordinates)
+  )
+  # Find the unique coordinates:
+  c_txt = paste0(coordinates_matrix$x, coordinates_matrix$y)
+  c_tbl = table(c_txt)
+}
+
+
 
 #' Create coherent network PMtiles
 #'

R/data.R

@@ -53,6 +53,33 @@
 #' data(NPT_demo_6km)
 #' head(NPT_demo_6km)
 "NPT_demo_6km"
+NULL
 
+#' Central Leeds OSM Network
+#' 
+#' See the `data-raw` folder for the code used to generate this data set.
+#' 
+#' @docType data
+#' @keywords datasets
+#' @name central_leeds_osm
+#' @format An object of class \code{sf} (inherits from \code{data.frame}).
+#' @examples
+#' head(central_leeds_osm)
+#' library(sf) # for plotting
+#' plot(central_leeds_osm$geometry)
+NULL
 
+#' Edinburgh off road network
+#'  
+#' This data set contains network data for Edinburgh's off-road network.
+#' 
+#' @docType data
+#' @keywords datasets
+#' @name edinburgh_offroad
+#' @format An object of class \code{sf} (inherits from \code{data.frame}).
+#' @examples
+#' data(edinburgh_offroad)
+#' head(edinburgh_offroad)
+#' library(sf) # for plotting
+#' plot(edinburgh_offroad$geometry)
 NULL

README.Rmd

@@ -69,6 +69,15 @@ if (!require("remotes")) {
 remotes::install_github("nptscot/corenet")
 ```
 
+To install `corenet`, you may need to add an additional repository to access the `rsgeo` package:
+
+```{r}
+options(repos = c(
+  josiahparry = 'https://josiahparry.r-universe.dev',
+  CRAN = 'https://cloud.r-project.org'
+))
+install.packages('corenet')
+```
 Load the package with the following for local development:
 
 ```{r, include=FALSE}
@@ -599,4 +608,5 @@ cycle_network = function(area, NPT_network, length_threshold = 1) {
 
     return(summarized_data)
 }
-```
+```
+

data-raw/central_leeds.qmd

@@ -0,0 +1,26 @@
+---
+format: gfm
+---
+
+The aim of this script is to generate a minimal example route network dataset for central Leeds for use in the package and testing.
+
+```{r, eval=FALSE, echo=FALSE}
+# Test removeDangles
+library(tidyverse)
+headrow = central_leeds_osm |> 
+  filter(name == "The Headrow")
+plot(headrow$geometry)
+central_leeds = sf::st_buffer(headrow, 100)
+sf::sf_use_s2(FALSE)
+central_leeds_osm = osmactive::get_travel_network(central_leeds, boundary = central_leeds, boundary_type = "clipsrc")
+
+plot(central_leeds_osm$geometry)
+central_leeds_nodangle_10 = removeDangles(central_leeds_osm, tolerance = 10)
+central_leeds_nodangle_default = removeDangles(central_leeds_osm)
+plot(central_leeds_nodangle_10$geometry) # it works!
+plot(central_leeds_nodangle_default$geometry)
+
+usethis::use_data(central_leeds_osm, overwrite = TRUE)
+
+```
+

data-raw/osm_edinburgh_demo.R

@@ -152,3 +152,57 @@ cycle_net |>
   plot()
 
 usethis::use_data(osm_edinburgh_demo, overwrite = TRUE)
+
+find_component= function(rnet, threshold = 50) {
+
+  sf::st_crs(rnet) = 27700
+
+  # Calculate the distance matrix between features
+  dist_matrix = sf::st_distance(rnet)
+
+  # Convert the threshold to units of meters
+  threshold = units::set_units(threshold, "m")
+
+  # Create a connectivity matrix where connections are based on the threshold distance
+
+  connectivity_matrix = Matrix::Matrix(dist_matrix < threshold, sparse = TRUE)
+
+  # Create an undirected graph from the adjacency matrix
+  graph = igraph::graph_from_adjacency_matrix(connectivity_matrix, mode = "undirected", diag = FALSE)
+
+  # Find the connected components in the graph
+  components = igraph::components(graph)
+
+  # Assign component membership to the road network
+  rnet$component = components$membership
+
+  # Return the updated road network with component membership
+  return(rnet)
+}
+
+
+lads = sf::read_sf("D:/Github/nptscot/npt/inputdata/boundaries/la_regions_2023.geojson")
+
+target_zone = lads |>
+  dplyr::filter(LAD23NM == "City of Edinburgh") |>
+  sf::st_transform(crs = 27700)
+
+osm = osmactive::get_travel_network("Scotland", boundary = target_zone, boundary_type = "clipsrc")
+cycle_net = osmactive::get_cycling_network(osm)
+drive_net = osmactive::get_driving_network_major(osm)
+cycle_net = osmactive::distance_to_road(cycle_net, drive_net)
+cycle_net = osmactive::classify_cycle_infrastructure(cycle_net)
+# filter cycle_net based on column bicycle is yes dismount adn designated
+cycle_net = cycle_net |>
+  dplyr::filter(bicycle %in% c("yes", "dismount", "designated")) |>
+  dplyr::filter(cycle_segregation == "Separated cycle track") |>
+  dplyr::mutate(length = as.numeric(sf::st_length(geometry))) |>
+  dplyr::filter(length > 1) |>
+  sf::st_transform(crs = 27700)
+
+cycle_net = sf::st_cast(cycle_net, "LINESTRING")  
+cycle_net = cycle_net |> dplyr::select(geometry)
+cycle_net$length = sf::st_length(cycle_net)
+edinburgh_offroad = find_component(cycle_net, threshold = 1)
+
+usethis::use_data(edinburgh_offroad, overwrite = TRUE)