Questions tagged [r-mapview]
An R package that provides methods for interactive plotting of spatial objects from the sf, sp and raster packages.
r-mapview
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The mapview() function does not display the map on the display
Recently, the mapview() function has stopped working correctly. Instead of the card, I get an empty display, while everything worked fine before. In order to solve this problem, What is the problem ...
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R Mapview and Leaflet render in quarto and shiny but not in Rstudio when with R 4.4.0
With the new update of R version 4.4.0, mapview and leaflet do not render in the viewer window of RStudio but do render when used in shiny applications or quarto documents.
These will preview fine in ...
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Fitting a Long Legend Within Mapview
I like what mapview outputs but can't really use it with with the burst option (seems to make legend interactive and zooms to group on click) as there's no way to adjust the scale of the legend. Is ...
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Why and how to fix Mapview not show all points and st_buffer merges some areas R?
I'm building a map with mapview package. However, when I use st_sample and generate points, some don't get mapped. In addition, st_buffer merges some areas (where they should be separate).
library(sf)
...
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R mapview choose color of polygon based on color code in column
I got polygon spatial data (could be points too) with a column specifying the color in hex. Could be something like:
colfunc <- colorRampPalette(c("gold1", "gold3"))
clrs <- ...
- 83
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Why is there no output for mapview() command in R 4.2.2 (August 2023)?
After installing the "mapview" package in R 4.2.2 and importing its library into a Jupyter notebook, I cannot create any maps. Although the data is loaded, any attempt to render a map figure ...
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raster and polygons in leaflet, without raster interpolation
I'm trying to display several layers in leaflet (or mapview), one of which is a raster in EPSG:27700. The only way I manage to adequately overlay those layers is through the default latlong projection,...
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Raster output from rasterized sf points does not align with points
I am trying to rasterize some points and am getting a mismatch between the points and the rasters despite the crs being the same. If I convert the raster to polygons it lines up perfectly with the sf ...
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R: saving a leaflet with white background
I am currently working on a ShinyApp, which includes maps built using sf objects and leaflet.
I found the solution to change the initial grey background of the map to a white background (by adding css ...
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323
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Use If clauses in shiny output depending on the existence of input
I'm relatively new to shiny and have been encountering the following problem :
I want to display a map (using mapview) with a checkboxinput (filtering stuff) and a different map when all the boxes ...
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reduce file size of exported leaflet html by linking several layers to the same data (json) instead of keeping the information separately
Generating leaflet html's easily results in a 50-75 MB file (depending on the number of layers). However, they can be zipped to reduce the file size by factors. So i guess there is lots of repetitive ...
- 251
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mapview: transparent na.color when displaying raster files
When I plot aerial photographs in mapview a black rectangle is displayed around the picture, which I believe contains NA values and which I would like to remove. Due to the lack of easily available ...
- 607
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package installation error with 'mapview' package
I am trying to install the 'mapview' package in R. I tried restarting R, clearing the environment, terminating all the sessions, and restarting and with a totally new session.But I keep getting same ...
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Using mapshot() to save mapview(), data layer doesn't show when saving PNG
This has to be an easy fix but this is my first time using mapview and mapshot and I'm stuck. I've investigated other postings and the documentation but I can't see a source.
I've created an object ...
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273
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Map average value on a Choropleth map
I am creating a shiny app that:
Allows the user to upload a shapefile (sf_object) "filemap".
Based on the uploaded shapefile, the user will then be able to
select a column/variable of ...
- 1,995