Questions tagged [shiny]
Web Application Framework for R
47
questions
0
votes
0answers
18 views
Leaflet in R Shiny — Custom Color Ramp for Tiled Data?
I have large-ish grids (roughly 9000 x 9000 cells) of model results in single-band GeoTIFFs (re-projected from raw outputs in FLT in a different coordinate system). I am displaying them over a tiled ...
0
votes
0answers
21 views
Create a reactive function to select one of many data frames - Shiny R
I am fairly new to working with Shiny R and I am having some trouble creating a reactive function that will select one of many data frames to be used as the input for plot creation. Each data frame ...
1
vote
1answer
34 views
Read gdb into shiny app
I want to access a feature class inside a geodatabase (gdb) from inside my shinyapp. I can access the fc class once I provide the gdb path:
gdb_data = arcgisbinding::arc.open(gdb)
but how do I get ...
0
votes
0answers
28 views
Setting Reactivity in Leaflet Shiny to subset and redraw features from two fields
I am new to Leaflet and Shiny and would like to create two reactive functions from two columns in my shapefile frame(map1). I would want the application to redraw polygons based on the input made in ...
1
vote
2answers
60 views
Adding Corine WMS to Shiny Leaflet
I'm trying to add Corine land cover data to a shiny leaflet map. However, I'm struggling to decipher the WMS XML data so that I can include the appropriate server URL and layer. The WMS information ...
1
vote
1answer
95 views
Filter Leaflet markers by input selectionin R Flexdashboard
I am trying to filter the markers that are drawn on a Leaflet map based on what is selected in a user defined date range. The below codes is returning an error that it is unable to find hfxLoc object. ...
0
votes
0answers
55 views
Leaflet polygon labels not showing when pathOptions(clickable = FALSE)
I am creating a Shiny app which contains a Leaflet map. The purpose of the map is to select a polygon by clicking on the map, and then to draw a choropleth of results for the selected polygon. ...
0
votes
1answer
105 views
Programmatic way of accessing mapbox tileset from leaflet WITHOUT studio
I have a R shiny app that successfully uses leaflet to interact with a custom mapbox studio style.
mapbox_url = "https://api.mapbox.com/styles/v1/bweinstein/ck94nmzn20an31imrz6ffplun/tiles/256/{z}...
2
votes
0answers
22 views
GetFeatureInfo with leaflet.extras2 and Shiny
I am building an R Shiny App that utilizes the following WMS. However, the GetFeatureInfo capabilities for click-enabled popup (leaflet.extras2 functionality) returns a summary of the GetCapabilities. ...
0
votes
0answers
37 views
Using WMS getFeatureInfo() in shiny and leaflet
I like to get the getFeatureInfo by a click like it is mentioned in this post so that the information is shown in a popup window.
I tried trevis solution but it is not working for me. If I use addWMS()...
1
vote
1answer
74 views
Mapbox Tileset turns blank at high zoom in Shiny using Leaflet, but not in MapBox Studio
I uploaded a large (~8GB) geotiff to mapbox using the CLI.
mapbox upload bweinstein.6thBridge_03182020 6thBridge_03182020.tif
Everything appears fine in mapbox studio. Max Zoom is 22 and you can ...
1
vote
0answers
72 views
Struggling to find a shiny workaround to flush data from $finished while using EditMod in the mapEdit package
This is a crosspost from the mapedit issues github page here. I am attempting to build a shiny app that allows a user to plot a subset of data after selecting polygons using the mapedit package. While ...
3
votes
1answer
94 views
MapBox studio distorts and removes polygons in tileset
I'm having an issue uploading a large polygon tileset to mapbox studio from an R simple features object. From R i've projected my simple features to web mercator and i've tried saving either as shp (...
2
votes
0answers
35 views
tmap max categories being weirdly combined
I am trying to plot homeless numbers in the UK using tmap. However, I am coming into some problems with the max.categories for tmap_options.
Data
EnglandWales <- geojson_read("https://opendata....
1
vote
0answers
164 views
How to add the mapview layers in Leaflet maps in r shiny app?
server <- function(input, output){
output$map <-renderLeaflet({
df_data <- uploadshapefile()
...
df_data <- as.data.frame(df_data)
df_data@data$
id <- nrow(df_data)
lm....
1
vote
0answers
93 views
Bounding box in Leaflet
I am currently writing a app in R / Shiny where I use Leaflet. Background layers are WMS and it works fine for most services without specifying any projection anywhere. When using fiddler I see that ...
0
votes
0answers
54 views
How to upload only a shapefile to R shiny and convert it to spatial dataframe?
I have been searched to upload a shapefile in ui.R and to convert the shapefile to spatial dataframe using sf in server.R. But I didn't got any answer. If someone knows let me know.
0
votes
0answers
369 views
Disable scroll wheel zoom event in Leaflet for R
Is there a way to disable scroll wheel zoom events for Leaflet in R, when you do not know what the zoom is in advance?
output$map <- renderLeaflet({
location <- input$location_id
lf_bbox &...
3
votes
1answer
460 views
Shiny leaflet click-event returns NULL when clicked again
When leafletProxy() is used, the click event of leaflet returns NULL when a polygone is clicked for the second time.
How can I prevent it from doing so?
Example code:
library(shiny)
library(...
1
vote
0answers
60 views
No applicable method for 'metaData' applied to an object of class “NULL” with Leaflet map
I'm putting together a Shiny app that involves a Leaflet map. Unfortunately, whenever I run it, it produces this error: "no applicable method for 'metaData' applied to an object of class "NULL"". I'm ...
1
vote
0answers
299 views
Setting up leaflet map in R using if/else if/else filtering
I'm trying to put together a map for work. Right now, the script looks as such (The shape file data can be downloaded here):
library(tigris)
library(mapview)
library(leaflet)
library(sf)
library(...
1
vote
2answers
111 views
getMapData returns NULL in R
I'm trying to use the getMapData function inside an R shiny app, but the function returns NULL whenever I call it.
library(leaflet)
# works
m <- leaflet() %>% addTiles() %>% setView(-80,30,...
1
vote
0answers
65 views
Error while rendering Leaflet map on Shiny
I have been trying to reproduce a Leaflet map on a Shiny webpage. I have made this code so far:
library(shiny)
library(shinydashboard)
library(leaflet)
library(rgdal)
library(dplyr)
library(DT)
Map &...
0
votes
1answer
124 views
R Shiny Openstreetmaps - lock map within a set of upper and lower bounds
I am using Openstreetmaps with R/Shiny. I am trying to restrict map display to a given range of coordinates, i.e.xmin, ymin, xmax, ymax so that the users of the map won't be able to look other parts ...
0
votes
0answers
152 views
Auto zoom when uploading shapefile R / Leaflet
I would like to configure an automatic zoom at the canvas of the shapefile layer that I upload. For that it would be necessary that a function automatically detects the latitude and the longitude of ...
0
votes
1answer
394 views
Using R with Leaflet and Shiny to produce WMS?
I've have been using R with Leaflet and Shiny to produce a web map that is accessible to the public online. It is a real-time air temperature map of Tasmania, Australia based on current Bureau or ...
1
vote
1answer
83 views
Save a shapefile in a temporary file
I would like to add a line after the transformation of my shapefile in order to save it in a temporary file.
uploadShpfile <- reactive({
if (!is.null(input$shp)) {
inFile <- input$...
0
votes
1answer
568 views
Input points shapefile in shiny app
The application I created allows me to import a polygon shapefile into my Leaflet map. However, I would like to set up a point shapefile import on the same button. I tried several attempts, especially ...
3
votes
0answers
829 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 ...
2
votes
1answer
2k 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). ...
1
vote
0answers
1k views
How to add a text on a Leaflet map
Each day I need to draw a path on a map and add a text (like 4, 5 or 8 min) indicating how long it takes by car from the starting point to the destination (see the figure below).
I thought it would ...
1
vote
0answers
351 views
Shiny leaflet map renders twice on switching input
I'm trying to produce a Shiny app with Leaflet that renders a choropleth map based on different input criteria. The map displays incidents of different types (input$type) and backgrounds (input$...
4
votes
2answers
3k views
Using R Shiny to create a plot with a shapefile and a raster
I just wanted to upload a shapefile and a raster in a RShiny app and then execute a script. What I have wrote is the following;
library(shiny)
library(raster)
library(rgdal)
ui=shinyUI(fluidPage(...
1
vote
0answers
3k views
Dynamic leaflet scale / zoom / bounds in R Shiny Applications
I've dug into a few older stack exchanges on this topic, but am at a standstill.
I am attempting to let leaflet dynamically resize in a large shiny app when the application is resized. I'm doing that ...
3
votes
1answer
599 views
Reusing leaflet map elements in custom functions in Shiny/R
I have an application that reuses several leaflet elements, so I'm trying to build functions to streamline my code.
All of my logical attempts failed, so I utilized an example I was familiar with ...
2
votes
0answers
568 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 ...
1
vote
1answer
5k views
Using .shp files in R with leaflet and shiny
I'd like to use the following .shp file to plot area development outlines for KY using leaflet in a shiny app. I use the code below, but I get an error that ".prj file is missing." Also, no outline ...
5
votes
2answers
2k views
Adding a linestring by st_read in Shiny/Leaflet
I have a large shapefile. For a better perfomance I try to load data with st_read() from sf package. The official documentation states that it should be very easy to integrate the shapefile into ...
3
votes
1answer
3k views
Leaflet: tool for multiple marker selection and computation of summary
Let's suppose that we've got a leaflet map with some markers and another layer, a raster image let's say. Is there a tool, or a way to create one, that allows one to select with an area, a subset of ...
7
votes
1answer
883 views
How do I tile raster input to speed up display in R Shiny programs?
Disclaimer: I have very little GIS experience
I've been working on a project in R that involves displaying large raster maps in an R Shiny interface. I am using the leaflet package for display. The ...
2
votes
1answer
5k views
Removing specific Circle Markers in Leaflet Shiny
I have a layer of CircleMarkers and I am trying to remove only the markers that have a certain layerId. The id's for these circle markers are in a dataframe. In reality I have millions of id's whose ...
3
votes
1answer
1k 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 ...
4
votes
1answer
1k 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 ...
1
vote
1answer
2k views
Changing the line width/weight in Leafletr addPolylines function depending on an attribute
I would like to display flow lines (OD-lines) using leaflet in Shiny and sofar I can successfully map all the lines I want. But I also want to change the line width so that each line will have a ...
3
votes
2answers
4k views
Disable double click zoom event in Leaflet for R
Is there a way to disable the double click zoom in Leaflet for R?
I've created a Shiny app that changes polygon styles when a country's region is clicked on/off. If you select and immediately ...
1
vote
1answer
767 views
Problems transforming polygon projections inside Shiny app
I've just recently started attempting to build mapping apps with leaflet and shiny in R. I'm currently stumped by an issue with projecting polygons inside shiny.
Here is the shapefile to reproduce ...
4
votes
1answer
7k views
Changing the style of a polygon with a click event in a Shiny/Leaflet app
I'm attempting to create my first Shiny app using Leaflet. I'm currently trying to figure out how observers work together to update the map when something is clicked. Here is the example that I've ...
