No data displayed with sync

[oscarperpinan]

Hello,

The sync function shows a strange behaviour. The maps created with mapview display both the data and the underlying layer. However, when these maps are shown together with sync, the data is missing.

library(sp)
library(mapview)
library(leafsync)

data(meuse)
coordinates(meuse) <- ~x+y
proj4string(meuse) <- CRS("+init=epsg:28992")

## view different aspects of same data set
m1 <- mapview(meuse, zcol = "soil", burst = TRUE)
m2 <- mapview(meuse, zcol = "lead")
m3 <- mapview(meuse, zcol = "landuse", map.types = "Esri.WorldImagery")
m4 <- mapview(meuse, zcol = "dist.m")

m1 #correct

sync(m1, m2, m3, m4) #no data

[tim-salabim]

Can you try to set mapviewOptions(fgb = FALSE) before creating the mapview maps and see whether that works?

[oscarperpinan]

Thanks. Checked, it works now.

From the help file of mapviewOptions I understand that with fgb = TRUE a folder with the data is needed, but it's not clear to me if this folder is created automatically.

[tim-salabim]

With fgb = TRUE the data is attached to the HTML file, rather than included. I think if you set different layer.names for the maps, things should also work with fgb = TRUE

[oscarperpinan]

Sorry, but I don't understand what do you mean with different layer.names. The meuse object is a SpatialPointsDataFrame whose names are all different.
By the way, the example of this issue is just a copy of the one included in your README.

[tim-salabim]

If I run the example as is (i.e. with fgb = TRUE), it works for me:

What's your sessionInfo()?

Forget my comment about layer.names, they are being set correctly in mapview, when you specify a zcol.

[oscarperpinan]

R version 4.3.2 (2023-10-31)
Platform: x86_64-pc-linux-gnu (64-bit)
Running under: Debian GNU/Linux trixie/sid

Matrix products: default
BLAS:   /usr/lib/x86_64-linux-gnu/blas/libblas.so.3.12.0 
LAPACK: /usr/lib/x86_64-linux-gnu/lapack/liblapack.so.3.12.0

locale:
 [1] LC_CTYPE=es_ES.UTF-8       LC_NUMERIC=C              
 [3] LC_TIME=es_ES.UTF-8        LC_COLLATE=es_ES.UTF-8    
 [5] LC_MONETARY=es_ES.UTF-8    LC_MESSAGES=es_ES.UTF-8   
 [7] LC_PAPER=es_ES.UTF-8       LC_NAME=C                 
 [9] LC_ADDRESS=C               LC_TELEPHONE=C            
[11] LC_MEASUREMENT=es_ES.UTF-8 LC_IDENTIFICATION=C       

time zone: Europe/Madrid
tzcode source: system (glibc)

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

other attached packages:
 [1] rgl_0.111.6         leafsync_0.1.0      leafpop_0.1.0      
 [4] mapview_2.11.2      gstat_2.1-1         ggrepel_0.9.5      
 [7] osmdata_0.2.5       classInt_0.4-3      sp_1.4-5           
[10] sf_1.0-15           RColorBrewer_1.1-3  latticeExtra_0.6-29
[13] ggplot2_3.3.5       lattice_0.22-5     

loaded via a namespace (and not attached):
 [1] gtable_0.3.0            xfun_0.28               servr_0.27             
 [4] raster_3.6-26           httr2_1.0.0             htmlwidgets_1.6.1      
 [7] leaflet.providers_2.0.0 vctrs_0.4.1             tools_4.3.2            
[10] crosstalk_1.2.0         generics_0.1.1          stats4_4.3.2           
[13] curl_4.3.2              tibble_3.1.6            proxy_0.4-26           
[16] spacetime_1.3-1         fansi_0.5.0             xts_0.13.2             
[19] pkgconfig_2.0.3         KernSmooth_2.23-22      satellite_1.0.4        
[22] uuid_1.2-0              leaflet_2.2.1           lifecycle_1.0.1        
[25] compiler_4.3.2          farver_2.1.0            FNN_1.1.4              
[28] munsell_0.5.0           terra_1.7-29            codetools_0.2-19       
[31] httpuv_1.6.14           htmltools_0.5.7         class_7.3-22           
[34] later_1.3.2             pillar_1.6.4            crayon_1.4.2           
[37] jquerylib_0.1.4         ellipsis_0.3.2          brew_1.0-10            
[40] tidyselect_1.1.2        digest_0.6.28           dplyr_1.0.9            
[43] purrr_0.3.4             fastmap_1.1.1           grid_4.3.2             
[46] colorspace_2.0-2        cli_3.3.0               magrittr_2.0.1         
[49] base64enc_0.1-3         utf8_1.2.2              leafem_0.2.3           
[52] e1071_1.7-9             withr_2.4.2             promises_1.2.1         
[55] scales_1.1.1            rappdirs_0.3.3          lubridate_1.8.0        
[58] jpeg_0.1-9              zoo_1.8-9               png_0.1-7              
[61] knitr_1.36              rgdal_1.6-4             rlang_1.1.3            
[64] Rcpp_1.0.10             glue_1.6.2              DBI_1.1.1              
[67] xml2_1.3.6              svglite_2.1.3           jsonlite_1.7.2         
[70] rstudioapi_0.15.0       R6_2.5.1                systemfonts_1.0.5      
[73] intervals_0.15.4        units_0.7-2