slideView multiple points with Shiny

[maxlavoie]

HI,
I recreated successfully your example with slideView found here https://www.rdocumentation.org/packages/mapview/versions/2.6.3/topics/slideView. My question is: Is it possible to use slideView on several points (i.e., one slideView per point). Like we do with images. I tried using multiple slideView or frameWidget but no luck. I like having two images per point. Sorry if this is the wrong place for asking. I could not find anything on that matter. love that package, thank you.

I tried something like that. The map render, but the slides don't show up

slide <- slideView(img2000, img2004)
slide2 <- slideView(img3000, img3004)
slides <- list(x, y)

coordinates(dat3) <- ~ GPSLongitude  + GPSLatitude #the data frame has 2 points
proj4string(dat3) <- "+init=epsg:4326"

m <- mapview(dat3, map.types = "Esri.WorldImagery", popup = lapply(slides, popupGraph))

[tim-salabim]

Can you provide a reproducible example for me? I am struggling to understand what you are trying to do.

[maxlavoie]

I am sorry for taking your time. By building the reproducible example, I did things differently, and I think I made it work. Here is what I was trying to do:

library(exifr)
library(dplyr)
library(leaflet)
library(readr) #for the updated version of read.csv
library(stringr) #for wrangling strings
library(RColorBrewer)
library(mapview)
library(raster)
library(OpenImageR)
library(magick)
library(jpeg)

data(poppendorf)
stck1 <- subset(poppendorf, c(3, 4, 5))
stck2 <- subset(poppendorf, c(2, 3, 4))
slideView(stck1, stck2)

slide <- slideView(stck1, stck2)

web_img2000 <- "http://cdn.newsapi.com.au/image/v1/68565a36c0fccb1bc43c09d96e8fb029"

jpg2000 <- readJPEG(readBin(web_img2000, "raw", 1e6))

rst_blue2000 <- raster(jpg2000[, , 1])
rst_green2000 <- raster(jpg2000[, , 2])
rst_red2000 <- raster(jpg2000[, , 3])

img2000 <- brick(rst_red2000, rst_green2000, rst_blue2000)

web_img2013 <- "http://cdn.newsapi.com.au/image/v1/5707499d769db4b8ec76e8df61933f2a"

jpg2013 <- readJPEG(readBin(web_img2013, "raw", 1e6))

rst_blue2013 <- raster(jpg2013[, , 1])
rst_green2013 <- raster(jpg2013[, , 2])
rst_red2013 <- raster(jpg2013[, , 3])

img2013 <- brick(rst_red2013, rst_green2013, rst_blue2013)

slide2 <- slideView(img2000, img2013)
slides <- list(slide, slide2)

dat3 <- data.frame(GPSLongitude = c(-78.653, -79.987), GPSLatitude = c(48.98, 46.98))

coordinates(dat3) <- ~ GPSLongitude + GPSLatitude
proj4string(dat3) <- "+init=epsg:4326"

mapview(dat3, map.types = "Esri.WorldImagery", popup = popupGraph(slides, type = "html"))

[tim-salabim]

cool, yes that seems to work!

[maxlavoie]

A quick question. In a shiny app (or flexdashboard), where should I put the images for the slideview? I tried inside the main app folder or in a www folder but the images are not displayed ("Not found" is written in the popup). Or any idea why the images are not displayed (the map and the points are there) in a shiny app. Ultimately, it does not matter if it's Shiny or Rmarkdown I just want to be able to share this map. Any suggestions? thanks!

[tim-salabim]

Yeah this is a reoccuring issue. Outside of shiny they need to be one level higher than the index.html. I assume that this would also be the case for a shiny app but I have never tried it.

[maxlavoie]

Here what I have done. server.R file inside the app folder (App > server.R). And the index.html (App > www > index.html) file is located in a www folder. And the images are in the app folder. Still, nothing showing up in the popup. When you say it is a reoccurring issue, do you have other examples where I could look into? Alternatively, I could use the same thing you used for your post (https://environmentalinformatics-marburg.github.io/mapview/popups/html/popups.html#). As long as I can share it. I would really like to make it work. It's a neat feature!

[tim-salabim]

Again, a reproducible shiny app would be helpful.

[maxlavoie]

OK, here is one:

library(exifr)
library(dplyr)
library(leaflet)
library(readr) #for the updated version of read.csv
library(stringr) #for wrangling strings
library(RColorBrewer)
library(mapview)
library(raster)
library(OpenImageR)
library(magick)
library(jpeg)

data(poppendorf)
stck1 <- subset(poppendorf, c(3, 4, 5))
stck2 <- subset(poppendorf, c(2, 3, 4))
slideView(stck1, stck2)

slide <- slideView(stck1, stck2)

web_img2000 <- "http://cdn.newsapi.com.au/image/v1/68565a36c0fccb1bc43c09d96e8fb029"

jpg2000 <- readJPEG(readBin(web_img2000, "raw", 1e6))

rst_blue2000 <- raster(jpg2000[, , 1])
rst_green2000 <- raster(jpg2000[, , 2])
rst_red2000 <- raster(jpg2000[, , 3])

img2000 <- brick(rst_red2000, rst_green2000, rst_blue2000)

web_img2013 <- "http://cdn.newsapi.com.au/image/v1/5707499d769db4b8ec76e8df61933f2a"

jpg2013 <- readJPEG(readBin(web_img2013, "raw", 1e6))

rst_blue2013 <- raster(jpg2013[, , 1])
rst_green2013 <- raster(jpg2013[, , 2])
rst_red2013 <- raster(jpg2013[, , 3])

img2013 <- brick(rst_red2013, rst_green2013, rst_blue2013)

slide2 <- slideView(img2000, img2013)
slides <- list(slide, slide2)

dat3 <- data.frame(GPSLongitude = c(-78.653, -79.987, -80), GPSLatitude = c(48.98, 46.98, 50))

coordinates(dat3) <- ~ GPSLongitude + GPSLatitude
proj4string(dat3) <- "+init=epsg:4326"

ui = fluidPage(

mapviewOutput("mymap")

)

server <- function(input, output, session){

output$mymap <- renderMapview({

mapview(dat3, map.types = "Esri.WorldImagery", popup = popupGraph(slides, type = "html"))

})

}

shinyApp(ui, server)