Nothing
genhash <- function (len = 10) {
paste0 (sample (c (letters, LETTERS, 0:9), size = len), collapse = "")
}
sf_to_sc <- function (x) {
pts <- do.call (rbind, x$geometry)
pts <- data.frame (
"x_" = pts [, 1],
"y_" = pts [, 2],
"vertex_" = rownames (pts),
stringsAsFactors = FALSE
)
pts <- pts [which (!duplicated (pts)), ]
edge <- lapply (x$geometry, function (i) {
cbind (
rownames (i) [1:(nrow (i) - 1)],
rownames (i) [2:nrow (i)]
)
})
for (e in seq (edge)) {
edge [[e]] <- cbind (edge [[e]], names (x$geometry) [e])
}
edge <- data.frame (do.call (rbind, edge), stringsAsFactors = FALSE)
edge$edge_ <- vapply (
seq (nrow (edge)), function (i) genhash (10),
character (1)
)
object_link_edge <- data.frame (
edge_ = edge$edge_,
object_ = edge$X3,
native_ = TRUE,
stringsAsFactors = FALSE
)
edge <- data.frame (
".vx0" = edge$X1,
".vx1" = edge$X2,
"edge_" = edge$edge_,
stringsAsFactors = FALSE
)
x_no_g <- x
x_no_g$geometry <- NULL
osm_id <- as.character (x_no_g$osm_id)
x_no_g$osm_id <- NULL
for (i in names (x_no_g)) {
x_no_g [[i]] <- as.character (x_no_g [[i]])
}
x_no_g <- as.list (x_no_g)
x_no_g <- lapply (x_no_g, function (i) {
res <- cbind (osm_id, i)
res [which (!is.na (res [, 2])), , drop = FALSE]
})
for (i in seq (x_no_g)) {
x_no_g [[i]] <- cbind (x_no_g [[i]], names (x_no_g) [i])
}
x_no_g <- data.frame (do.call (rbind, x_no_g),
stringsAsFactors = FALSE
)
object <- data.frame (
"object_" = x_no_g$osm_id,
key = x_no_g$V3,
value = x_no_g$i,
stringsAsFactors = FALSE
)
object <- object [order (object$object_), ]
res <- list (
nodes = NULL,
object = object,
object_link_edge = object_link_edge,
edge = edge,
vertex = pts
)
class (res) <- c ("SC", "sc", "osmdata_sc")
return (res)
}
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