Почему все мои полигоны имеют одинаковую метку в R Leaflet? - PullRequest
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Почему все мои полигоны имеют одинаковую метку в R Leaflet?

0 голосов
/ 06 мая 2019

В настоящее время я работаю над блестящим приложением, которое показывает пользователям, где они могут припарковать автомобиль в государственном университете. Сейчас я пытаюсь выяснить, почему все многоугольники в моем простом объекте-объекте имеют одинаковую метку «Лот L». Я хотел, чтобы на каждой метке отображалось название местоположения, связанное с соответствующим полигоном (то есть полигон «Eagle Bank Arena» помечен как «Eagle Bank Arena», полигон «Центр Джонсона» помечен как «Центр Джонсона» и т. Д.). .)

Имена местоположений содержатся в столбце атрибутов, который называется «Местоположение». Будем весьма благодарны за любую помощь в том, как я могу решить мою проблему.

Ссылка на приложение Shiny:

https://cypher -trial.shinyapps.io / Trial_Map /

Мой код: 

library(shiny)
library(shinyWidgets)
library(tidyverse)
library(leaflet)
library(leaflet.extras)
library(htmltools)
library(sf)
library(ggmap)

#Joining Coordinates

Johnson_Center <- rbind(c(-77.30488,38.82845), c(-77.30422,38.82837), c(-77.30399,38.82942), c(-77.30466,38.82951), c(-77.30488,38.82845))

Shenandoah_Parking_Deck <- rbind(c(-77.30807,38.83035),c(-77.30746,38.83060),c(-77.30675,38.82959),c(-77.30741,38.82933),c(-77.30807,38.83035))

Eagle_Bank_Arena <- rbind(c(-77.30995,38.82731),c(-77.31029,38.82702),c(-77.31028,38.82664),c(-77.30989,38.82638),c(-77.30940,38.82641),c(-77.30906,38.82670),c(-77.30908,38.827076),c(-77.30946,38.82733),c(-77.30995,38.82731))

Rappahannock_Parking_Deck <- rbind(c(-77.30673,38.83415),c(-77.30687,38.83509),c(-77.30521,38.83526),c(-77.30504,38.83432),c(-77.30673,38.83415))

Mason_Pond_Parking_Deck <- rbind(c(-77.30998,38.82996),c(-77.31028,38.83043),c(-77.30954,38.83075),c(-77.30956,38.83079),c(-77.30943,38.83087),c(-77.30906,38.83036),c(-77.30998,38.82996))

Lot_L <- rbind(c(-77.31015,38.82494),c(-77.31042,38.82492),c(-77.31180,38.82593),c(-77.31118,38.82645),c(-77.30928,38.82513),c(-77.30978,38.82468),c(-77.31015,38.82494))

#Combine Coordinate into list of ploygons
Test_Locations <-st_polygon(list(Johnson_Center,
                                 Shenandoah_Parking_Deck,
                                 Eagle_Bank_Arena,
                                 Rappahannock_Parking_Deck,
                                 Mason_Pond_Parking_Deck,
                                 Lot_L))

#Test the ploygons
plot(Test_Locations)

#Create Simple Feature Column
Test_Location_sfc <-  st_sfc(Test_Locations)

#Create a dataframe with just one column - "Location"
Location_Name <- cbind.data.frame(c("Johnson Center",
                  "Shenandoah Parking Deck",
                  "Eagle Bank Arena",
                  "Rappahannock Parking Deck",
                  "Mason Pond Parking Deck",
                  "Lot L"))

names(Location_Name)[1]<-"Location"

#Create Simple Feature
sf_final <- st_sf(Location_Name, Test_Location_sfc)

#Define CRS
st_crs(sf_final) <- "+proj=longlat +datum=WGS84"

#Define palette for legend

simple_list <- c("Always","Sometimes","Never")

legend_options <- factor(simple_list, labels = c("Always","Sometimes","Never"))

pal_legend <- colorFactor(palette = c("#41d33f","#e3fc44","#838487"),
                          domain = legend_options,
                          ordered = FALSE)

ui <- bootstrapPage(
tags$style(type = "text/css", "html, body {width:100%;height:100%}"),
leafletOutput("MAP_EXAMPLE", width = "100%", height = "100%"),
absolutePanel(id = "controls", class = "panel panel-default",
              fixed = TRUE, draggable = TRUE, top = 20, left = "auto", right = 20,
              bottom = "auto", width = 330, height = "auto", align = "center",

              p(h2("Where Can I Park?")),

              br(),

              pickerInput("permit_or_visitor",label = "Are you a permit holder or visitor?", choices = c('Active Permit Holder','Visitor'),
                          multiple = FALSE, selected = 'Visitor', options = list(`actions-box` = TRUE,`none-selected-text` = "Nothing Selected",`live-search` = TRUE)),

              conditionalPanel("input.permit_or_visitor == 'Active Permit Holder'",

                               pickerInput("permit_type",label = "Permit Type?", choices = c("Permit A","Permit B","Permit C","Permit D"),
                                           multiple = FALSE, selected = "Permit A", options = list(`actions-box` = TRUE,`none-selected-text` = "Nothing Selected",`live-search` = TRUE))),

              conditionalPanel("input.permit_or_visitor == 'Visitor'",

                               pickerInput("visitor_type",label = "What type of parking are looking for?", choices = c("Option A","Option B","Option C","Option D"),
                                           multiple = FALSE, selected = "Option A", options = list(`actions-box` = TRUE,`none-selected-text` = "Nothing Selected",`live-search` = TRUE)))



              )
                    )




server <- function(input, output) {

  output$MAP_EXAMPLE <- renderLeaflet({ 

  leaflet(options = leafletOptions(dragging = TRUE,
                                     minZoom = 15,
                                     maxZoom = 19)) %>%

    addProviderTiles("OpenStreetMap") %>% 

    setView(lng = -77.3084807, lat = 38.8314936, zoom = 15) %>%  #Complete Zoom Range [0:19]

    setMaxBounds(lng1 = -77.2800,
                 lat1 = 38.8210,

                 lng2 = -77.3380,
                 lat2 = 38.8415) %>% 

       addResetMapButton() %>% 

    addMarkers(lng = -77.280, lat = 38.821, popup = "Bottom Right") %>% 
    addMarkers(lng = -77.3380, lat = 38.8415, popup = "Top Left") %>% 

      addPolygons(data = sf_final,
                  color = "purple",
                  label = ~Location) %>% 

      addLegend(title = "Can I park here?",
                position = "bottomleft",
                pal = pal_legend,
                values = legend_options,
                opacity = 1.0)

                               })

}

# Run the application 
shinyApp(ui = ui, server = server)
...