CODEWITHSUNDEEP
rshinyr-leaflet
Tim
Tim

Reputation: 293

Shiny turns grey when running on server - leaflet takes long to build up

I run a shiny app on our local server to map different geodata with leaflet. Some datasets I want to map are available as WMS and are loaded with 

%>% addWMSTiles()

Other data are stored as SpatialPolygonDataFrame (SPDF) as .rda files locally and are plotted with

%>% addPolygons()

when the app is executed.

When running the app on my local laptop everything works fine - it takes rd. 15-20sec to build up the app, because I plot 18 different WMS and 5 different SPDF.

However, problems arise when I run the app on our server. After some time (during building up) the app suddenly turns grey.

I found out that the slow build up of the app is because of the local SPDF files. However, the local SPDF files have a size of max 1.5 MB.

I wonder if there is a better solution to plot polygons. Is there a recommended format for geo-polygons in shiny / leaflet?

Upvotes: 4

Views: 559

Answers (1)

Marnick
Marnick

Reputation: 81

I had exactly the same problem. Running local, it works fine, running it on shiny-server, it greys out. See Using many markers with leaflet for my description. Apperantly there is a limit on the nr of polygons that leaflet can handle which is different when using shiny-server. There appears to be no real solution to this execept plotting less polygons. For example by using markerclusters.

Upvotes: 2

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