leafem | leaflet extensions for mapview | Map library
kandi X-RAY | leafem Summary
kandi X-RAY | leafem Summary
leafem provides extensions for package leaflet many of which are used by package mapview. The intention of this package is to enhance leaflet functionality to provide a more GIS-like feeling when plotting spatial data interactively.
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QUESTION
if I run my code without plumber function, the popupgraph does work well. but if I run with plumber function, I receive error 404 of web. Any idea how to resolve this? to popupgraph works with plumber api?
...ANSWER
Answered 2020-Nov-25 at 15:19Plumber does not know how to route /popup_graphs/
. This particular plot reference other objects using an iframe. I added an endpoint to tell plumber how to route these requests.
Edit : I looked at the source code for popupGraph
and you can just mount a static assets path to precomputed popup so it is as fast as it can be.
QUESTION
I would like to add OpenStreetMap, OpenTopoMap and Stamen.TonerLines in a list to a leaflet map.
I get those names with
...ANSWER
Answered 2020-May-28 at 13:12You could do something like this
QUESTION
I have a shiny app that prompts users to enter a USGS NWIS Site Number, and then returns a map of nearby stations and a bar chart of historical stream flow around that site. I am having a hard time validating user input of the Site Number to textInput(). I need to prompt users to try again (and not accept the input) when users either don't enter a number and hit submit, enter an incorrect number (that doesn't exist in the NWIR database), or enter a number with leading or trailing spaces. Where should I put the call to 'validate' in this app?
...ANSWER
Answered 2019-Aug-07 at 17:47It would be easier to use selectInput
where you restrict the choices to valid sites. selectInput
can be used as a text search where the dropdown list will be filtered based on user input text.
Below image shows what I mean. Note that it works even if you have multiple = FALSE
in selectInput
-
As to answer your question -
You need to create a vector of valid sites
and use following in an upstream reative
or downstream in any relevant render*
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