Questions tagged [shiny]

Web Application Framework for R

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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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. ...
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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. ...
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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}...
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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. ...
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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()...
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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 ...
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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 ...
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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 (...
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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....
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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....
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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 ...
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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.
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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 &...
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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(...
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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 ...
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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(...
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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,...
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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 &...
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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 ...
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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 ...
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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 ...
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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$shp)) { inFile <- input$...
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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 ...
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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
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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). ...
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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 ...
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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$type) and backgrounds (input$...
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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(...
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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
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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
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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 ...
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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 ...