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Questions tagged [leaflet-r]

Questions referring to the Leaflet R package.

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0answers
35 views

Mutiple markers per single lat, long and curving polylines

1) I am plotting transfers from Facility A to Hospital. As such most the facilities have multiple transfers to different hospitals and different hospitals receive transfers from many facilities ...
0
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0answers
59 views

Specifying EPSG:31370 CRS in R Leaflet for WMS-service returns blank tiles

I am trying to load historical map tiles from a WMS-server (GetCapabilities) and display them using R Leaflet. Using the default CRS in Leaflet works fine, using e.g.: leaflet() %>% setView(4....
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0answers
136 views

Selecting and deselecting markers in leaflet under R shiny?

I would like to write a script that selects a marker on the map whenever I click on it and then deselect it when I click/select another marker (that is, so that no more that one marker is selected on ...
0
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1answer
76 views

Rearrange plotorder of SpatialPolygonsDataframe

I have a SpatialPolygonDataframe (loaded with readOGR) I want to plot in either tmap or leaflet. A lot of the polygons are overlapping, and the smaller polygons are completely covered by larger ...
0
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1answer
200 views

Conditionally adding markers to map in R leaflet and shiny

I am trying to add some markers to a leaflet map in R based on conditions that I select from an selectInput command. The selectInput command lets the user choose three different numbers (1, 2 or 4). ...
2
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1answer
100 views

How to create independent/fixed inset maps with leaflet?

I am trying to create a leaflet map of the USA focusing on the contiguous 48 states and then add two inset maps of Alaska and Hawaii on the side. The problem is that addMiniMap() option creates an ...
1
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1answer
146 views

R leaflet set zoom level of tiled basemap (ESRI World Imagery)

I need to define the maximum zoom level of a tiled map in R leaflet. The problem is that I have points that are placed very close to each other and I would like to be able to distinguish each of them ...
0
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0answers
521 views

Adding polylines to leaflet map in R

I am trying to add great circle routes between various regions in R. Here's the sample data: structure(list(CommencingRegion = c("RedSea", "EastAfrica", "GulfofMexico", "FarEast", "RedSea", "...
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0answers
325 views

Adding color to polylines in leaflet in R

I have had a look at this and other links therein. This is exactly what I am trying to achieve and failing. Here is some sample data: structure( list( lat = c(51.88783,51.8878441,51.887825,51....
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0answers
89 views

Creating a function for my addCircleMarkers preferences?

I am currently working on making a leaflet map in R with multiple addCircleMarker layers. The following code works, where df1 and df2 are datasets with lat and long data: library(leaflet) library(...
1
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1answer
1k views

Displaying several data rows in popup using Leaflet for R?

While trying to map some quantitative data with leafletin R, I manage to place pie-charts with leaflet.minichartson the map, like in the following example: ### data ### d <- structure(list( ...
2
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1answer
772 views

R leaflet - Bring base layer labels to front

I want to use a base layer so that my filled polygons are in geographic context. However, my polygons have simply gone over the top of the base layer and therefore only bits and pieces of place names ...
0
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1answer
224 views

Highlight Borders When Mouseover Fill Area - Leaflet-R

Following the guidance of TimSalabim I separated the borders and fill of my neighbourhood polygons so that I could order them appropriately with zIndex. https://lawsblog.netlify.com/post/leaflet-map/ ...
0
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1answer
738 views

Order of Vector Layers in Leaflet-R

Here is a leaflet map in R https://lawsblog.netlify.com/post/leaflet-map/ The white lines are neighbourhood boundaries. The green polygons are parks. The parks are drawn over the boundaries ...
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0answers
134 views

Mouseover in Leaflet Map Permanently Changes Map Colour

Note that if you mouseover a neighbourhood in this leaflet map the green parks change shade. However, when you move the mouse away the parks remain this faded color. Why? Here is the map: https://...
1
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1answer
2k views

Add Layers with Leaflet from Different Spatial Data Frames in R

Very new to R's Leaflet package and have two spatial data frames. 1) An outline of a city 2) Its major highways I wish to show both of these on the same map. I get how to do this with ggmap or ...
1
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0answers
135 views

Use two shapefiles in one Leaflet map in R

My query along with a minimal working example is already posted here: https://stackoverflow.com/questions/48924514/using-data-from-2-shapefiles-with-leaflet-in-r?noredirect=1#comment84855712_48924514 ...
1
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0answers
384 views

R Shiny / leaflet map: Projection problem in creating map in Plate Carree projection

I'm trying to create an R Shiny map using the leaflet package to display input layers in the Plate Carree projection rather than the default Spherical Mercator projection. I've input OSM and WMS tile ...
3
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1answer
891 views

Displaying sum of frequencies in leaflet cluster maps pointer

I've a dataset with locations and their frequencies (sum of counts) I want the leaflet cluster to display the frequencies as pointers instead of the count of occurrences. city state ...
2
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1answer
632 views

LeafletCRS projection issues

I am trying to get a map in the Dutch Rijksdriehoekstelsel coordinates in a Leaflet map in R that is going in a Shiny app later. I am going to have to add polygons later, and changing their X and Y ...
1
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1answer
309 views

Using leaflet with large data - ACS data for all counties in U.S

I'm plotting ACS data (counts of low-income children) for each county across the entire U.S. I don't have any markers, just a county shapefile and a value for each county in a popup. Unsurprisingly ...
4
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1answer
5k views

Generating random lat/long coordinates

Dedicated page on use of leaflet in R provides a very useful example on generating random latitude and longitude values for Central Europe: cbind(rnorm(40) * 2 + 13, rnorm(40) + 48) which results in ...
0
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1answer
2k views

Cutting leaflet map in R to a specific area

I am trying to cut a leaflet map in R, so I only show a specific municipality. I have manage to hide the remaining municipalities in the country, but that leaves the water and the rest of the world ...
4
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1answer
915 views

Why does Leaflet with provider tiles not draw markers as expected?

I'm working with Leaflet maps in Shiny for R. I'm producing a map with some markers on it. When I use addTiles () for my base map, everything works as expected. However with addProviderTiles (), the ...
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0answers
265 views

Proj4leaflet in UTM 32

I am trying to create a simple map in UTM32 (EPSG:25832) in R with leaflet and proj4leaflet, but I can't get it to work. I found a url for the basemap, but it could be a different one if you like - I ...