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rr-leaflet

Using images in pop-up in leaflet that remain within the HTML


I am creating an HTML file with leaflet and R for a proyect. The Idea is to add multiple markers in a map, and be able to click them and see a description as well as a picture. Here's an example code.

library(sp)
library(leaflet)
suppressPackageStartupMessages(library(imager))
coor<-c("11","-55","EG",
"12","-54","EG2")
df<-matrix(coor,ncol=3,byrow = TRUE)
df<-data.frame(lon=as.numeric(df[,1]),lat=as.numeric(df[,2]),Iden=df[,3])
descr<-c("Description written in popup.
         \n <img src=\"/A:/Path/FIle/Pics/EG.jpg\">",
"description 2 \n <img src=\"/A:/Path/FIle/Pics/EG_2.jpg\">")
df<-cbind.data.frame(df,descr)
colnames(df)[4]<-descr
coordinates(df) <- ~lat+lon
leaflet(df) %>% addMarkers(popup = ~descr,label = ~Iden) %>% addTiles()

The picture is shown properly if I open the file in my PC, however, when using the file in another device, the image is not there, because the img src is indicating a file location. What I want is to be able to export a single HTML file that contains the images in each pop-up, that can be oppened in any device. How can I do this?


Solution

  • You can encode the image into a URL using base64 (e.g see this web service)

    Example Image: https://cdn.sstatic.net/Sites/stackoverflow/Img/favicon.ico?v=ec617d715196

    Example HTML tag:

    <img src="data:image/x-icon;base64,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