R:带时间滑块的地图？

Question

有没有办法为Leaf中的Leaflet或任何其他交互式地图库实现时间滑块？我按时间序列排列数据,并希望将其整合到"运动"地图中,其中绘图点随时间动态变化.

我正在考虑将我的数据分成几部分,使用子集来捕获每个月的相应数据表.但是,如何在不同月份对应的不同数据集之间移动？

就目前而言,我取平均值并绘制了这些点,但我宁愿制作一个整合时间序列的地图.

到目前为止,这是我的代码:

data<-read.csv("Stericycle Waste Data.csv")
library(reshape2)
library(ggplot2)
library(plyr)
library(ggmap)
names(data)<-c("ID1","ID2", "Site.Address", "Type", "City", "Province", "Category", "Density", "Nov-14", "Dec-14", "Jan-15", "Feb-15", "Mar-15", "Apr-15", "May-15", "Jun-15", "Jul-15", "Aug-15", "Sep-15", "Oct-15", "Nov-15", "Dec-15", "Jan-16")
data<-melt(data, c("ID1","ID2", "Site.Address","Type", "City", "Province", "Category", "Density")) 
data<-na.omit(data)
data_grouped<-ddply(data, c("Site.Address", "Type","City", "Province", "Category", "Density", "variable"), summarise, value=sum(value))
names(data_grouped)<-c("Site.Address", "Type", "City", "Province", "Category", "Density", "Month", 'Waste.Mass')

dummy<-read.csv('locations-coordinates.csv')
geodata<-merge(data_grouped, dummy, by.x="Site.Address", by.y="Site.Address", all.y=TRUE)

library(leaflet)
d = geodata_avg$density_factor
d = factor(d)
cols <- rainbow(length(levels(d)), alpha=NULL)
geodata_avg$colors <- cols[unclass(d)]
newmap <- leaflet(data=geodata_avg) %>% addTiles() %>%
addCircleMarkers(lng = ~lon, lat = ~lat, weight = 1, radius = ~rank*1.1, color = ~colors,  popup = paste("Site Address: ", geodata_avg$Site.Address, "<br>", "Category: ", geodata_avg$Category, "<br>", "Average Waste: ", geodata_avg$value))
newmap

提前致谢!任何指导/见解将不胜感激.

Answer 1

认识到这是一个非常古老的问题，以防有人仍然想知道......

leaflet.extras2包有一些可能有帮助的功能。下面的示例使用一些tidyverse函数sfleaflet.extras2::addPlayback()来生成渥太华附近一些有趣的 GPS 轨迹并为其设置动画。

library(magrittr)
library(tibble)
library(leaflet)
library(leaflet.extras2)
library(sf)
library(lubridate)

# how many test data points to create
num_points <- 100

# set up an sf object with a datetime column matching each point to a date/time
# make the GPS tracks interesting
df <- tibble::tibble(temp = (1:num_points),
                     lat = seq(from = 45, to = 46, length.out = num_points) + .1*sin(temp),
                     lon = seq(from = -75, to = -75.5, length.out = num_points) + .1*cos(temp),
                     datetime = seq(from = lubridate::ymd_hms("2021-09-01 8:00:00"),
                                    to = lubridate::ymd_hms("2021-09-01 9:00:00"),
                                    length.out = num_points)) %>%
  sf::st_as_sf(coords = c("lon", "lat"), crs = "WGS84", remove = FALSE)

# create a leaflet map and add an animated marker
leaflet() %>%
  addTiles() %>%
  leaflet.extras2::addPlayback(data = df,
                               time = "datetime",
                               options = leaflet.extras2::playbackOptions(speed = 100))