spectral_indices.md
In rsi: Efficiently Retrieve and Process Satellite Imagery

no cache, update false

Code
  suppressWarnings(spectral_indices(update_cache = FALSE))
Output
  # A tibble: 231 x 9
     application_domain bands     contributor   date_of_addition formula long_name
     <chr>              <list>    <chr>         <chr>            <chr>   <chr>    
   1 vegetation         <chr [2]> https://gith~ 2021-11-17       (N - 0~ Aerosol ~
   2 vegetation         <chr [2]> https://gith~ 2021-11-17       (N - 0~ Aerosol ~
   3 water              <chr [6]> https://gith~ 2022-09-22       (B + G~ Augmente~
   4 vegetation         <chr [2]> https://gith~ 2021-09-20       (1 / G~ Anthocya~
   5 vegetation         <chr [3]> https://gith~ 2022-04-08       N * ((~ Anthocya~
   6 vegetation         <chr [4]> https://gith~ 2021-05-11       (N - (~ Atmosphe~
   7 vegetation         <chr [4]> https://gith~ 2021-05-14       sla * ~ Adjusted~
   8 vegetation         <chr [2]> https://gith~ 2022-04-08       (N * (~ Advanced~
   9 water              <chr [4]> https://gith~ 2021-09-18       4.0 * ~ Automate~
  10 water              <chr [5]> https://gith~ 2021-09-18       B + 2.~ Automate~
  # i 221 more rows
  # i 3 more variables: platforms <list>, reference <chr>, short_name <chr>

no cache, download false

Code
  spectral_indices(download_indices = FALSE)
Condition
  Warning:
  No cache file present and `download_indices` set to `FALSE`.
  i Returning (likely outdated) package data instead.
Output
  # A tibble: 231 x 9
     application_domain bands     contributor   date_of_addition formula long_name
     <chr>              <list>    <chr>         <chr>            <chr>   <chr>    
   1 vegetation         <chr [2]> https://gith~ 2021-11-17       (N - 0~ Aerosol ~
   2 vegetation         <chr [2]> https://gith~ 2021-11-17       (N - 0~ Aerosol ~
   3 water              <chr [6]> https://gith~ 2022-09-22       (B + G~ Augmente~
   4 vegetation         <chr [2]> https://gith~ 2021-09-20       (1 / G~ Anthocya~
   5 vegetation         <chr [3]> https://gith~ 2022-04-08       N * ((~ Anthocya~
   6 vegetation         <chr [4]> https://gith~ 2021-05-11       (N - (~ Atmosphe~
   7 vegetation         <chr [4]> https://gith~ 2021-05-14       sla * ~ Adjusted~
   8 vegetation         <chr [2]> https://gith~ 2022-04-08       (N * (~ Advanced~
   9 water              <chr [4]> https://gith~ 2021-09-18       4.0 * ~ Automate~
  10 water              <chr [5]> https://gith~ 2021-09-18       B + 2.~ Automate~
  # i 221 more rows
  # i 3 more variables: platforms <list>, reference <chr>, short_name <chr>

no cache, download and update false

Code
  spectral_indices(download_indices = FALSE, update_cache = FALSE)
Condition
  Warning:
  No cache file present and `download_indices` set to `FALSE`.
  i Returning (likely outdated) package data instead.
Output
  # A tibble: 231 x 9
     application_domain bands     contributor   date_of_addition formula long_name
     <chr>              <list>    <chr>         <chr>            <chr>   <chr>    
   1 vegetation         <chr [2]> https://gith~ 2021-11-17       (N - 0~ Aerosol ~
   2 vegetation         <chr [2]> https://gith~ 2021-11-17       (N - 0~ Aerosol ~
   3 water              <chr [6]> https://gith~ 2022-09-22       (B + G~ Augmente~
   4 vegetation         <chr [2]> https://gith~ 2021-09-20       (1 / G~ Anthocya~
   5 vegetation         <chr [3]> https://gith~ 2022-04-08       N * ((~ Anthocya~
   6 vegetation         <chr [4]> https://gith~ 2021-05-11       (N - (~ Atmosphe~
   7 vegetation         <chr [4]> https://gith~ 2021-05-14       sla * ~ Adjusted~
   8 vegetation         <chr [2]> https://gith~ 2022-04-08       (N * (~ Advanced~
   9 water              <chr [4]> https://gith~ 2021-09-18       4.0 * ~ Automate~
  10 water              <chr [5]> https://gith~ 2021-09-18       B + 2.~ Automate~
  # i 221 more rows
  # i 3 more variables: platforms <list>, reference <chr>, short_name <chr>

download false and update true

Code
  spectral_indices(download_indices = FALSE, update_cache = TRUE)
Condition
  Error in `spectral_indices()`:
  ! Cannot update the cache if not downloading indices.