是否可以在Shiny应用程序中加载离线/本地传单地图图块?我可以在交互式R会话中加载磁贴,如here所示,但我现在想尝试加载它们以便在Shiny应用中使用。这是我到目前为止所拥有的一个例子。我认为它与Shiny在IP和端口上运行并且需要通过IP和端口加载磁贴有关。我已经尝试了一些改变IP和端口的东西(使它们变得相同),正如here所解释的那样,但我们还没有想出任何可行的东西。我也可以使用在线图块来使用它,但我需要它来使用本地地图图块。
library(shiny)
library(leaflet)
library(RColorBrewer)
library(RgoogleMaps)
options(shiny.port = 8000)
(bwi <- getGeoCode("BWI;MD"))
df <- as.data.frame(rbind(bwi))
df$col <- c("orange")
df$name <- c("BWI")
icons <- awesomeIcons(
icon = 'ios-close',
iconColor = 'black',
library = 'ion',
markerColor = df$col
)
#################################################################################
ui <- bootstrapPage(
tags$style(type = "text/css", "html, body {width:100%;height:100%}"),
leafletOutput("map", width = "100%", height = "100%"),
absolutePanel(top = 10, right = 10,
style = "padding: 8px; background: #FFFFEE; opacity:.9",
checkboxInput("markers", "Show Markers?", TRUE)
)
)
#################################################################################
server <- function(input, output, session) {
output$map <- renderLeaflet({
leaflet() %>%
addTiles(urlTemplate = "http:/localhost:8000/C:/Users/OTAD USER/Documents/mapTiles/ESRIWorldTopoMap/{z}_{x}_{y}.png") %>%
setView(lat = bwi[1], lng = bwi[2], zoom = 8)
})
observe({
proxy <- leafletProxy("map", data = df)
# Remove/show any markers
proxy %>% clearMarkers()
if (input$markers) {
proxy %>% addAwesomeMarkers(lat = df$lat, lng = df$lon,
icon = icons, label = df$name)
}
})
}
#Put the ui and server together and run
runApp(shinyApp(ui = ui,
server = server), launch.browser=TRUE
)
答案 0 :(得分:4)
1-您必须通过提供&#34;别名&#34;来授权闪亮以在该文件夹中提供磁贴。在addResourcePath
2-然后将该别名用作addTiles
server <- function(input, output, session) {
addResourcePath("mytiles", "C:/Users/OTAD USER/Documents/mapTiles/ESRIWorldTopoMap")
output$map <- renderLeaflet({
leaflet() %>%
addTiles(urlTemplate = "/mytiles/{z}_{x}_{y}.png") %>%
setView(lat = bwi[1], lng = bwi[2], zoom = 8)
})
...