All Questions
17
questions
0
votes
0
answers
55
views
Why are my leaflet points stuck to the map edge?
I try to plot transit stops on a leaflet map, indicating local clustering ("LISA"), based on Moran's I. The map is embedded in an R markdown file.
I've successfully done that with polygon ...
- 23
0
votes
0
answers
43
views
Interactive R maps that work well on mobile, with inset AK and HI?
Issue: I need an interactive choropleth map of the US that will work well on mobile (ideally pinch-zoom), has a pop-up on tap/click, and has AK and HI set below. Plotly isn't it as you have to tap the ...
- 11
1
vote
1
answer
154
views
Displaying two different datasets on one map
I want to visualize two distinct datasets on a common map for comparison purposes (so they should have different Icons). So far, I've been using the following code, but it only allows me to display ...
- 283
0
votes
1
answer
477
views
Convert geometry column and retain other columns
I have imported a shapefile (.shp) into R to define a set of polygons. The shapefile takes the form of a grouped dataframe with ageometry column containing a MULTIPOLYGON list of XY coordinates. I ...
- 323
2
votes
1
answer
513
views
Leaflet - Calculate zoom level from radius in meters
I'm trying to find a way to calculate zoom level given a radius in meters.
For example, I want to show 100km radius within point x,y, how do I calculate the proper zoom level for that point?
- 2,971
0
votes
1
answer
292
views
"Leaflet" map showing blue background
I am trying to create a leaflet map in R studio but the map appears to have blue background. Although it is showing the markers but not the actual map.
Initially I thought it is due to slow processing ...
0
votes
1
answer
1k
views
How to render a leaflet choropleth map in shiny?
I have successfully created an interactive choropleth map using Leaflet in R that projects a single variable across a set of polygons.
library(RSocrata)
library(rgdal)
library(leaflet)
library(sp)
...
- 149
3
votes
1
answer
1k
views
Adding a 'click' event to leaflet polygons via R
How can I add a mouse 'click' event to each polygon plotted on a leaflet map? I want to do this so I can then filter a separate widget based on data from the features (in this case WD21CD).
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- 1,503
1
vote
0
answers
319
views
Leaflet polygon fillColor argument always produces error
I've been trying to produce a basic leaflet map of low income benefits in australia.
library(leaflet)
library(sf)
library(downloader)
library(dplyr)
library(RColorBrewer)
url <- "https://data....
- 89
0
votes
1
answer
864
views
simplify my us state shapefile with rmapshaper::ms_simplify gives error
I'm making chloropleth us state map on my shiny app using leaflet package. I found rendering the map is very slow. After googling , it seems like maybe the shapefile is too complex and simplifying ...
- 11.5k
0
votes
0
answers
155
views
Calculating a new lat/long co-ordinate by adding a distance to a starting co-ordinate?
I have an ascii grid of elevation data in 100M cells. I have a lat/long for a starting point and I need to add up these 100m increments and get new lat/long co-ordinate to draw a colored box around.
...
- 1
0
votes
1
answer
2k
views
How to use shiny range slider to filter points on leaflet point map
I'm trying to use shiny and leaflet to filter the points on a point map on/off depending on the value of a numeric variable ('Population')
I load libraries and data
#load libraries
library(shiny)
...
- 41
1
vote
2
answers
1k
views
Creating bordering polygons from spatial point data for plotting
I have had a good hunt around and can't find a solution to what seems to be a tricky problem.
I have basic XY (coordinate) data:
What I want to do is create neighbouring polygons based on the ...
- 568
1
vote
1
answer
50
views
leaflet() draws shapefile as giant rectangle
I'm running into a problem with leaflet where it is drawing a giant rectangle instead of the shapes. I'm certain there is some issue with the format of the shapefile, but I can't determine what's ...
- 4,194
16
votes
1
answer
3k
views
Optimising Shiny + Leaflet performance for detailed maps with many 'layers'
I want to make a Shiny app where the colouring of a choropleth is based on a numeric value of one of many possible quantitative variables that a user can select from. In simple cases, this is ...
- 929