leaflet addpolygon fill

[antoine4ucsd]

Hello

I am trying to show a worldmap of data. filling country by my variable. when I plot it, I have an issue with country being cut on one side. is it possible to make sure it does not happen. I tried different zoom and centering but it does not seem to work...

I used these base options

leaf_map_tiles =leaflet::leaflet(world_map,
                           options = leaflet::leafletOptions(attributionControl=F,
                                                             initialTileLayerAttribution="",
                                                             attributionPrefix=" ",
                                                                minZoom = 1.3,center = c(28,13), 
                                                             maxZoom = 4,
                                                             zoom=1.3))

but when I add polygon

leaf_map1 = leaf_map_tiles%>%
        leaflet::addPolygons(stroke = T, 
                             smoothFactor = 0.3,
                             weight = 1,
                            fillOpacity = ~factop(num_site2),
                             fillColor = ~pal2(num_site2),
                             color = "white")

then it shows up like below:

how can I prevent the filled country to be cut and appear on both sides?

also if want to add a tile like this one on top of it:

I do

leaf_map1 = leaf_map_tiles%>%
        leaflet::addPolygons(stroke = T, 
                             smoothFactor = 0.3,
                             weight = 1,
                            fillOpacity = ~factop(num_site2),
                             fillColor = ~pal2(num_site2),
                             color = "white")%>%leaflet::addTiles(tilesURL2)

but the filled countries are always on top even with the tiles (see north of pakistan)

any suggestions?

thank you for your help with both issues!

[Pakillo]

Hi @antoine4ucsd

I think you may get better answers asking on stackoverflow or similar, but here are my 2 cents:

For Alaska, you may

(a) shift the geometry (e.g. see rstudio/leaflet#172 (comment)) OR https://stackoverflow.com/questions/73451858/add-tiles-to-leaflet-map-with-alaska-hawaii-geometry-shifted)

(b) add a mini map (see https://gis.stackexchange.com/questions/301839/how-to-create-independent-fixed-inset-maps-with-leaflet)

[antoine4ucsd]

thank you for your reply. Much appreciated. I will investigate further and let you know how it works. my main issue is when multiple layer/tiles are involved. if you are interested (and have time), we can discuss further by mp.

Best.

[Pakillo]

For multiple layers, I'd suggest playing with different layer order and opacity. Also, it can be useful to add a control button so users can choose which layers to see: https://rstudio.github.io/leaflet/showhide.html

[antoine4ucsd]

I love this option. thank you for the feedback

[Pakillo]

You're welcome