我想在地图视图中突出显示前往地图上的节点/标记的所有线路。在此处的示例代码中,节点代表首都城市。将鼠标悬停在其中一个城市上时,我希望往返该城市的所有 4 条线路都会突出显示。当我尝试时,
hover
内的mapview
选项没有效果。
library(dplyr)
library(readr)
library(janitor)
library(sp)
library(purrr)
cc = read_csv("http://techslides.com/demos/country-capitals.csv")
nodes =
cc %>%
clean_names() %>%
mutate(capital_latitude = as.numeric(capital_latitude)) %>%
select(capital_name, capital_longitude, capital_latitude) %>%
filter(capital_name %in% c("Warsaw", "El-Aaiún", "Jamestown", "Antananarivo", "Manama"))
edges =
full_join(
nodes %>% rename(from = capital_name, from_lon = capital_longitude, from_lat = capital_latitude) %>% mutate(index = 1),
nodes %>% rename(to = capital_name, to_lon = capital_longitude, to_lat = capital_latitude) %>% mutate(index = 1),
by = "index") %>%
mutate(from_to = paste(from, "_", to)) %>%
filter(from != to) %>%
select(-index) %>%
rowwise() %>%
mutate(capital_lines = pmap(list(from_lon = from_lon, from_lat = from_lat, to_lon = to_lon, to_lat = to_lat, from_to = from_to),
function(from_lon, from_lat, to_lon, to_lat, from_to) {
Line(cbind(c(from_lon, to_lon),
c(from_lat, to_lat))) %>%
Lines(., ID = from_to)}
)) %>%
mutate(capital_lines = list(SpatialLines(list(capital_lines))))
mapview(nodes, xcol = "capital_longitude", ycol = "capital_latitude") +
mapview(do.call(rbind, edges$capital_lines))
library(mapview)
mapviewOptions(fgb = FALSE)
mapview(shp, highlight = leaflet::highlightOptions(color = "red", weight = 2, sendToBack = TRUE))
这对我有用。 详情请参阅https://github.com/r-spatial/mapview/issues/392。