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Error: Shape contains invalid polygons #15

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tungttnguyen opened this issue Oct 19, 2021 · 1 comment
Open

Error: Shape contains invalid polygons #15

tungttnguyen opened this issue Oct 19, 2021 · 1 comment

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@tungttnguyen
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Hello,

I tried running the example but got the following error:

> Error: Shape contains invalid polygons. Please fix it or set tmap_options(check.and.fix = TRUE) and rerun the plot

The code still did not work (was frozen) after setting the tmap_options(check.and.fix = TRUE)

Can you check what went wrong? Thank you!

library(concaveman)
library(dplyr)
library(purrr)
library(sf)
library(tmap)

data(points)

polygons <- map(unique(points$k),
                ~ concaveman(points[points$k %in% .,])
) %>% 
  map2(unique(points$k), ~ mutate(.x, k = .y)) %>% 
  reduce(rbind)

tm_shape(points) +
  tm_dots(col = "k", size = 0.1, legend.show = FALSE) +
  tm_shape(polygons) +
  tm_fill(col = "k", alpha = 0.5, legend.show = FALSE) +
  tm_borders() +
  tm_layout(frame = FALSE)
#> Error: Shape contains invalid polygons. Please fix it or set tmap_options(check.and.fix = TRUE) and rerun the plot

Created on 2021-10-19 by the reprex package (v2.0.1)

Session info 
sessioninfo::session_info()
#> - Session info ---------------------------------------------------------------
#>  setting  value                       
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#>  os       Windows 10 x64              
#>  system   x86_64, mingw32             
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#>  language (EN)                        
#>  collate  English_United States.1252  
#>  ctype    English_United States.1252  
#>  tz       America/Los_Angeles         
#>  date     2021-10-19                  
#> 
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#>
@prncevince
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prncevince commented Aug 2, 2022 •
edited

I've also experienced this. Increasing the concavity value can make the returned polygon valid, but the shape becomes more of a convex hull.

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@tungttnguyen @prncevince