Plot two or more lists containing SF collections

[markbidwell]

Hello, thanks for making Mapview - it's great!

I'm trying to create a single map using collections of simple features that are contained within three lists. But when I string together mapview commands using the "+" symbol, only the collections of SFs contained in the first list show up on the map (although collections of SFs from all three lists appear in the legend).

There's an example below (with just two lists) and I could put together a reproducible example if that would help.

Thank you! Mark

str(GPS_SF_list[[1]])
Classes ‘sf’ and 'data.frame': 334 obs. of 3 variables:
$ identity : chr "13Horseshoe_2015_0" "13Horseshoe_2015_0" "13Horseshoe_2015_0" "13Horseshoe_2015_0" ...
$ timestamp: chr "2016-01-13 07:43:00 UTC" "2016-01-13 09:00:00 UTC" "2016-01-13 11:00:00 UTC" "2016-01-13 13:00:00 UTC" ...
$ geometry :sfc_POINT of length 334; first list element: 'XY' num 90419 -2723

• attr(*, "sf_column")= chr "geometry"
• attr(, "agr")= Factor w/ 3 levels "constant","aggregate",..: NA NA
  ..- attr(, "names")= chr [1:2] "identity" "timestamp"

mapview(GPS_SF_list) #creates map of 6 SF collections (point geometry)
mapview(UD_SF_list) #creates another map of 6 SF collections (multipolygon geometry)
mapview(GPS_SF_list) + mapview(UD_SF_list) #creates map of 6 SF collections from first list (point geometry) but doesn't include 6 SF collections from the second list, although the legend does contain objects from second list