stplanr: overline_intersection – R documentation

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overline_intersection

Convert series of overlapping lines into a route network

Description

This function takes overlapping LINESTRINGs stored in an sf object and returns a route network composed of non-overlapping geometries and aggregated values.

Usage

overline_intersection(sl, attrib, fun = sum)

Arguments

`sl`	An `sf` `LINESTRING` object with overlapping elements
`attrib`	character, column names in sl to be aggregated
`fun`	Named list of functions to summaries the attributes by? `sum` is the default. `list(sum = sum, average = mean)` will summarise all `attrib`utes by sum and mean.

Examples

routes_fast_sf$value <- 1
sl <- routes_fast_sf[4:6, ]
attrib <- c("value", "length")
rnet <- overline_intersection(sl = sl, attrib)
plot(rnet, lwd = rnet$value)
# A larger example
sl <- routes_fast_sf[4:7, ]
rnet <- overline_intersection(sl = sl, attrib = c("value", "length"))
plot(rnet, lwd = rnet$value)
rnet_sf <- overline(routes_fast_sf[4:7, ], attrib = c("value", "length"))
plot(rnet_sf, lwd = rnet_sf$value)

# An even larger example (not shown, takes time to run)
# rnet = overline_intersection(routes_fast_sf, attrib = c("value", "length"))
# rnet_sf <- overline(routes_fast_sf, attrib = c("value", "length"), buff_dist = 10)
# plot(rnet$geometry, lwd = rnet$value * 2, col = "grey")
# plot(rnet_sf$geometry,  lwd = rnet_sf$value, add = TRUE)

stplanr

Sustainable Transport Planning

v0.8.2

MIT + file LICENSE

Authors

Robin Lovelace [aut, cre] (<https://orcid.org/0000-0001-5679-6536>), Richard Ellison [aut], Malcolm Morgan [aut] (<https://orcid.org/0000-0002-9488-9183>), Barry Rowlingson [ctb], Nick Bearman [ctb], Nikolai Berkoff [ctb], Scott Chamberlain [rev] (Scott reviewed the package for rOpenSci, see https://github.com/ropensci/onboarding/issues/10), Mark Padgham [ctb], Andrea Gilardi [ctb] (<https://orcid.org/0000-0002-9424-7439>)

Initial release