All Questions
47
questions
0
votes
1
answer
59
views
Selectively load parts of a map
Suppose I have the following shapefile:
library(sf)
library(leaflet)
library(leafgl)
library(colourvalues)
library(leaflet.extras)
nc <- st_read(system.file("gpkg/nc.gpkg", package=&...
- 5,705
2
votes
1
answer
252
views
sf::st_combine makes MULTIPOLYGONs with holes
I have some polygons in a data.frame called walktime.
> class(walktime)
[1] "sf" "data.frame"
I want to combine the polygons to one. As I understand this is possible ...
0
votes
1
answer
119
views
Does the order of locations change when making a voronoi map with leaft and sf?
I am making a voronoi map in R using the packages leaflet and sf as follows:
library(leaflet)
library(sf)
library(rnaturalearth)
library(rnaturalearthdata)
long <- c(4.35556 , 5.83745, 4.63683 ...
- 571
0
votes
1
answer
460
views
Constructing polygon using latitude-longitude coordinates in R
I am trying to construct a polygon using four latitude-longitude coordinates. However, the polygon does not get constructed as desired. The polygon lining is constructed way far than the lat-long ...
- 19
0
votes
0
answers
41
views
Adding names on map using tmap/tmaptools [duplicate]
I have made a map using the cited packages and code. However, I would like to add names or country codes on top of each country like in picture two. Is this possible?
library(sf)
library(tmap)
library(...
- 51
0
votes
1
answer
354
views
Getting spatial polygon intersections, excluding borders
I am trying to find which City Council districts represent which zip codes in NYC by using the sf library and leaflet. I have spatial polygons for both council districts and zip codes. My problem is ...
5
votes
1
answer
445
views
Import data from a leaflet map as an sf object in R
I want to import data as an sf object in R from a leaflet map. The map is this site: https://erickgn.github.io/mapafc/ I also have the HTML from the map as following:https://raw.githubusercontent.com/...
- 125
0
votes
1
answer
470
views
Separate long/lat columns for multilinestrings and plotting in colours
I am new to plotting in R/leaflet. I am plotting a shapefile with multilinestrings into R with leaflet.
Is there a way I can extract from the geometry column separate columns for lat and long ...
- 69
1
vote
0
answers
147
views
Highlight a section of a line between two points (Leaflet/R)
Given a line and two points along that line, how can I highlight the section of the line between the two points?
The code below provides an example of a line (tr) and two points (sg) that fall on it, ...
- 21
2
votes
0
answers
315
views
R leaflet fitBounds() conflicts with leafletProxy?
I am having some trouble with an app which reacts completely random when I launch it.
The goal of this app is to display a map and zoom on a polygon.
I have 4 random behaviours for this app everytime ...
- 2,485
0
votes
1
answer
489
views
How to find correct projection of the shapefile data for leaflet map in r?
I am new to geo spatial data & trying to create choropleth map using leaflet & shapefile.
I have tried to plot the data on leaflet map but getting an error: Error: Must supply x/y attributes ...
- 1,729
0
votes
0
answers
284
views
Turning Leaflet Feature into SF Feature
Edit: I am using leaflet.extras and the addDrawToolbar() function to my leaflet map. Within shiny, I am reading the outputs of a users input using shape = input$[mapID]_draw_new_feature. I'd like to ...
- 324
1
vote
1
answer
586
views
Is there a way to transform a png icon to a sf multipolygon in R?
I would like to merge a layer of this ship icon to my shapefile. I would like to transform in a multipolygon sf... There is a way?
0
votes
0
answers
75
views
Saving what is displayed in a leaflet popup
When I plot an address in leaflet, I can display the value in my dataset that corresponds to the row that the polygon is found on. But how can I save this value?
Example:
I plot an address in leaflet ...
- 1
2
votes
2
answers
364
views
Rotating and translating a polygon
I've come across a problem when I was trying to apply rotations and translations to a rectangle and then visualize both on leaflet. I am trying to rotate my rectangle 180° and then translate it ...
- 111