Utilizing the openweathermap weather widget on a Leaflet map within the R programming

I am attempting to incorporate custom weather tiles onto a leaflet map within a Shiny application by utilizing the leaflet-openweathermap JavaScript library found here. As someone who is not well-versed in JavaScript, I am encountering difficulties with rendering the weather layers on the map.

My approach involved downloading leaflet-openweathermap.js and storing it within the www/js directory of my application. Next, I registered the plugin:

openWeatherPlugin <- htmlDependency(
  "Leaflet.OpenWeather",
  "1.6.0",
  src = normalizePath(path = getwd()),
  script = "www/js/leaflet.openweathermap.js"
)

In order to display a weather layer on leaflet, I implemented the following:

leaflet() %>% 
  addTiles() %>% 
  registerPlugin(openWeatherPlugin) %>% 
  onRender("
            function(el, x){
            L.OWM.clouds({showLegend: true, opacity: 0.5, appId: 'MY_APP_ID'})
            }
           ")

The value for MY_APP_ID is a valid identifier obtained from openweathermap.org Despite these efforts, the code does not produce the desired cloud weather layer. Due to my limited knowledge of JavaScript, I am unsure of what may be causing this issue. Any assistance or guidance would be greatly appreciated.

javascriptropenweathermaphtmlwidgetsr-leaflet

Answer №1

To integrate weather data into my Leaflet map, I decided to use the addProviderTiles function instead of relying on raw javascript or the openweather library. As part of this process, I needed to include my OpenWeatherMap API key within the providerTileOptions:

map = leaflet() %>%;
    addProviderTiles(providers$CartoDB.Positron) %>%;
    setView(-122.36075812146, 35.6759920119894, zoom = 11) %>%; 
    addProviderTiles(providers$OpenWeatherMap.Wind,  
        options=providerTileOptions(apiKey="<myAPIkey>"))              

map

Answer №2

Have you considered adding .addTo(this); within the onRender function, like this:

  onRender("function(el, x){
          L.OWM.clouds({showLegend: true, opacity: 0.5, appId: 'MY_APP_ID'}).addTo(this);
        }
       ")

If your javascript file is named leaflet-openweathermap.js and you have leaflet.openweathermap.js, did you change the hyphen to a period?

I am not seeing any clouds using your API key. It seems that the ID may not be valid, as indicated by this message in the console:

[HTTP/1.1 401 Unauthorized 99ms]

Remember, the appId should be your private key, not just the name.

Everything should work properly with a valid key.

https://i.sstatic.net/Hpbua.jpg

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