All Questions
48
questions
0
votes
1
answer
110
views
Handling polygon edits in shiny app using leafpm
I am working on a shiny app that lets users interactively draw polygons on a leaflet map using the "leafpm" package, calculate forest biometrics, report them, and make those polygons ...
- 815
0
votes
1
answer
60
views
How to use shiny reactive functions for plotting an sf object that mapped a numeric column based on its quantiles
I am trying to use select input that filters the data based on a categorical column, income_grp in my example, and then use geom_sf to draw a map of a numerical column like pop_est with color ...
- 338
0
votes
1
answer
243
views
‘Invalid color name error’ when using multiple color palette as a nested list in shiny selectInput for sf plot function
Could someone help me understand what’s wrong with the below code. I would like to use two categories of color palette, single and multiple hue, for pal argument in the plot function of sf. Thanks in ...
- 338
0
votes
1
answer
139
views
Click on a polygon of a leaflet map and subset the same dataset which is displayed in table
I have the shiny app below with this sf object and I want to use the leaflet package to create an interactive map with clickable polygons. When a user clicks on a polygon, the app will save and ...
- 8,276
0
votes
1
answer
59
views
Shiny for choropleth map with two selection lists
I have df, and I wanted to create a shiny application that gets updated based on the value of two selection lists, one for picking an indicator, and the other for choosing the subgroup. I also create ...
- 338
0
votes
1
answer
316
views
How to make leaflet markers fit within sf polygons for any zoom level?
How can I dynamically size leaflet markers to fit within sf polygons for any zoom level?
I have a series of sf polygons similiar to the nc (North Carolina) example below. Each of these polygons has ...
- 26
0
votes
2
answers
126
views
Custom Tmap palette based on results
I'm trying to create a custom palette for tmap in R where the colours represent a result from a general election.
In the below photo you can see my plot doesn't have a palette attached and is using ...
- 27
1
vote
1
answer
47
views
Shiny slide bar malfunctioning - sliderInput()
I am very new on R Shiny, but I do have a question rerarding the sliderInput().
I am able to make the bar "work", but apparently it is not understanding the values min() and max() values ...
- 15
0
votes
0
answers
46
views
Shiny / Flex-dashboard Reactive Polygon Creation
This might be one for the GIS board, but any help is appreciated. I suspect it is a lack of knowledge around how Shiny works in flex dashboard. I have a map that will take a lat/ and long point (as ...
- 107
0
votes
1
answer
228
views
Shiny Leaflet not being able to pick user uploaded shapefile(sf_object) data path
I am creating a shiny app that:
Allows the user to upload a shapefile (sf_object) "filemap" (I am assuming sf wants all the files associated with a shapefile exported from ArcPro).
Based on ...
- 1,995
0
votes
1
answer
182
views
Object Temp_Map not found while trying to render a Leaflet Map
I know this question has been asked a lot of time, but every question varies according to the code/purpose. That being said I am creating shiny app that:
Allows the user to upload a shapefile (...
- 1,995
0
votes
1
answer
426
views
Load data into a R shiny app depending on selectInput
I have an app which is supposed to show a map of the crop types of a certain district.
The data are geometry data (.shp files) which I want to load after the district was choosen.
Whether the data are ...
1
vote
1
answer
151
views
{sf} monitor rowwise progress of reading shapefile with sf::st_read
I'm trying to monitor the progress of reading a shapefile (.shp) with sf::st_read. st_read offers five class-specific methods to dispatch:
# > methods(sf::st_read)
# [1] st_read.character* ...
user18309711
1
vote
1
answer
3k
views
R & Postgis: ERROR: Geometry type (Polygon) does not match column type (MultiPolygon)
The code below enables me to add polygons I draw on a leaflet map to tables in my database.
However I have some difficulties since the geometry column of my table is called "geom" and the ...
- 129
0
votes
0
answers
221
views
Error in sample.int(length(x), size, replace, prob) : invalid first argument in Shiny app
I'm trying to run data in RDS format in the Shiny app but I keep getting this error
Error in sample.int(length(x), size, replace, prob) : invalid first argument
When I tried to run the data as CSV ...
- 373