leaflet map not rendering in Viewer

[lixinyao]

When I run the code on R leaflet tutorial, the Viewer is empty. When I click the zoom button, it is still empty. Here is the code:

library(leaflet)
m <- leaflet() %>%
  addTiles() %>%  # Add default OpenStreetMap map tiles
  addMarkers(lng=174.768, lat=-36.852, popup="The birthplace of R")
m  # Print the map

Here is the session_Info()

R version 3.3.3 (2017-03-06)
Platform: x86_64-apple-darwin13.4.0 (64-bit)
Running under: macOS Sierra 10.12.3

locale:
[1] zh_CN.UTF-8/zh_CN.UTF-8/zh_CN.UTF-8/C/zh_CN.UTF-8/zh_CN.UTF-8

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods  
[7] base     

other attached packages:
 [1] REmap_0.3.2        tidyr_0.6.1        RJSONIO_1.3-0     
 [4] ggplot2_2.2.1      maptools_0.9-1     sp_1.2-4          
 [7] dplyr_0.5.0        stringr_1.2.0      rjson_0.2.15      
[10] leafletCN_0.2.2    leaflet_1.1.0.9000 RMySQL_0.10.9     
[13] DBI_0.6           

loaded via a namespace (and not attached):
 [1] Rcpp_0.12.10        plyr_1.8.4          git2r_0.18.0       
 [4] tools_3.3.3         digest_0.6.12       jsonlite_1.3       
 [7] memoise_1.0.0       tibble_1.2          gtable_0.2.0       
[10] lattice_0.20-34     shiny_1.0.0         crosstalk_1.0.0    
[13] curl_2.3            yaml_2.1.14         withr_1.0.2        
[16] httr_1.2.1          htmlwidgets_0.8     devtools_1.12.0    
[19] grid_3.3.3          R6_2.2.0            XML_3.98-1.5       
[22] foreign_0.8-67      magrittr_1.5        scales_0.4.1       
[25] htmltools_0.3.5     assertthat_0.1      mime_0.5           
[28] xtable_1.8-2        colorspace_1.3-2    httpuv_1.3.3       
[31] stringi_1.1.2       lazyeval_0.2.0.9000 munsell_0.4.3 

What should I do? Thanks!

[lixinyao]

args(leaflet::addTiles) returns

function (map, urlTemplate = "https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png", 
    attribution = NULL, layerId = NULL, group = NULL, options = tileOptions()) 
NULL

print(browse=TRUE, htmltools::img(src="https://www.google.com/images/logo.gif")) returns a blank pane

[Benrath]

I was struggling with the same thing and bugget out. Turns out you can just add the default template from args() . The map only shows when you save the Widget. Or should it show within R? @lixinyao

m <- leaflet() %>%
  addTiles(urlTemplate = "https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png") %>%  
  addMarkers(lng=174.768, lat=-36.852, popup="The birthplace of R")
saveWidget(m, file = "mymap.html")

[vikram-rawat]

I too have the same problem I even updated Rstudio to the latest one. which is 1.0.153

a very simple code like this

leaflet() %>%
addTiles() %>% # Add default OpenStreetMap map tiles
addMarkers(lng=174.768, lat=-36.852, popup="The birthplace of R")

Doesn't produce anything on Viewer but You have to switch to Browser to see the MAP. Which is turning out to be a Pain. Please Please plz FIX it.

[maxbre]

same issue here

following and further elaborating the above posted reproducibile example
strange enough black and white OSM is working fine where default OSM is not
RStudio Version 1.1.447

#-------------------------------

leaflet() %>%
addTiles() %>%
addProviderTiles(providers$OpenStreetMap, group = "osm_default")%>%
addProviderTiles(providers$OpenStreetMap.BlackAndWhite, group = "osm_bw") %>%
addMarkers(lng=174.768, lat=-36.852, popup="The birthplace of R") %>%
addLayersControl(position='topleft',
baseGroups = c("osm_default", "osm_bw"),
options = layersControlOptions(collapsed = TRUE))
#--------------------

any hint to sort out that problem?

thank you

[schloerke]

@maxbre Can you please give me your devtools::session_info().

There is a known issue of RStudio and linux not working with https (See #526). This is fixed in the next version (1.2.x) of the IDE of RStudio. You can download the daily version here: https://dailies.rstudio.com/

I am seeing that OpenStreeMap is redirecting to use https (new to me).

Does it work if it is opened with the browser using

options(viewer = NULL)
leaflet() %>%
  ...

[maxbre]

here it is my session info

setting value
version R version 3.4.4 (2018-03-15)
system x86_64, linux-gnu
ui RStudio (1.1.447)
language (EN)
collate en_GB.UTF-8
tz UTC
date 2018-05-29

by the way I sorted out the problem by installing the github version of leaflet

[schloerke]

Keep issue open until RStudio releases 1.2.x as a regular download

[aaguilargonzalez]

@schloerke would this issue still persist for Shiny apps? I noticed markers would not show up when I uploaded my app to shinyapps.io using leaflet 2.0.0, but would run fine in latest RStudio IDE. I resolved the issue by downgrading to leaflet 1.1.0, but ideally would like to run leaflet 2.0.0 to use leaflet extras. Here's the app on shinyapps.io (https://aaguilargonzalez.shinyapps.io/Dashboard_V2/)

[schloerke]

@aaguilargonzalez
This is due to a bad cdn choice on my part. It is fixed in #544 (merged into github master).

I expect a release to CRAN this week.

[aaguilargonzalez]

@schloerke awesome, will keep an eye out for it thanks!

[schloerke]

@aaguilargonzalez Leaflet 2.0.1 is on cran. This should solve the marker issue.

Still keeping issue open until RStudio IDE 1.2.x is released.

[yenzichun]

Hi,

I have similar issue here but not sure if they are related.
My map won't show (either on viewer or browser) when the popup includes specific Chinese character.

Here's a example:

df <- read.csv(textConnection("
Name,Lat,Long
成功,23.02086,121.3315
成,23.02086,121.3315
"))

# not working 
leaflet(df[1,]) %>% addTiles() %>%
    addMarkers(~Long, ~Lat, popup=~Name)

# working
leaflet(df[2,]) %>% addTiles() %>%
    addMarkers(~Long, ~Lat, popup=~Name)

As you can see, the only difference between df[1,] and df[2,] is the value of the column Name.
As long as the character vector include the Chinese character "功", the map won't render in Viewer nor Browser.

here's the sessionInfo():

R version 3.5.1 (2018-07-02)
Platform: x86_64-w64-mingw32/x64 (64-bit)
Running under: Windows 7 x64 (build 7601) Service Pack 1

Matrix products: default

locale:
[1] LC_COLLATE=Chinese (Traditional)_Taiwan.950 
[2] LC_CTYPE=Chinese (Traditional)_Taiwan.950   
[3] LC_MONETARY=Chinese (Traditional)_Taiwan.950
[4] LC_NUMERIC=C                                
[5] LC_TIME=Chinese (Traditional)_Taiwan.950    

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods  
[7] base     

other attached packages:
[1] sf_0.7-2      leaflet_2.0.2 sp_1.3-1     

loaded via a namespace (and not attached):
 [1] Rcpp_1.0.0       rstudioapi_0.9.0 magrittr_1.5    
 [4] units_0.6-2      xtable_1.8-3     lattice_0.20-35 
 [7] R6_2.4.0         rlang_0.3.1      tools_3.5.1     
[10] grid_3.5.1       e1071_1.7-0.1    DBI_1.0.0       
[13] htmltools_0.3.6  crosstalk_1.0.0  class_7.3-14    
[16] yaml_2.2.0       digest_0.6.18    tibble_2.0.1    
[19] crayon_1.3.4     shiny_1.2.0      later_0.8.0     
[22] htmlwidgets_1.3  promises_1.0.1   mime_0.6        
[25] pillar_1.3.1     compiler_3.5.1   classInt_0.3-1  
[28] jsonlite_1.6     httpuv_1.4.5.1   pkgconfig_2.0.2 

Any known issue about it?

Thanks in advance.

[martinocrippa]

Morning All,

for me if i explicit to add a tiles with the function [addProviderTiles(providers$OpenStreetMap)](https://www.rdocumentation.org/packages/leaflet/versions/2.0.2/topics/addProviderTiles) show the map without problems.

Code example:

exe1 <- leaflet(DF) %>% 
    addCircles() %>% 
    # add layer to see map
    addProviderTiles(providers$OpenStreetMap)
exe1 

have nice day
MC

[maxbre]

openstreetmap 'black and white' not showing up whilst openstreetmap 'default' it does

any hint to sort out the problem?

#-----------------------------------------
leaflet() %>%
addTiles() %>%
#addProviderTiles(providers$OpenStreetMap)%>%
addProviderTiles(providers$OpenStreetMap.BlackAndWhite) %>%
addMarkers(lng=174.768, lat=-36.852, popup="The birthplace of R")
#------------------------------------------

here my session info

RStudio Version 1.2.5019

version R version 3.6.1 (2019-07-05)
os Debian GNU/Linux 9 (stretch)
system x86_64, linux-gnu
ui RStudio
language (EN)
collate en_GB.UTF-8
ctype en_GB.UTF-8
tz UTC
date 2019-12-05
leaflet * 2.0.3.9000 2019-11-29 [1] Github (c19b0fb)

[christophGeoHealthCentre]

No map shown in viewer

r version: 4.0.0 (2020-04-24)
RStudio version: 1.2.5042
Code:

library(leaflet)
m <- leaflet() %>% addTiles()
m <- m %>% setView(7, 51, zoom = 11)
m