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Merge pull request #5 from bluegreen-labs/patch-hwsd-v2
Patch hwsd v2
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| Original file line number | Diff line number | Diff line change |
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@@ -8,6 +8,8 @@ | |
| ^CONDUCT\.md$ | ||
| ^NEWS\.md$ | ||
| ^docs$ | ||
| ^data-raw$ | ||
| ^analysis$ | ||
| ^pkgdown$ | ||
| ^LICENSE$ | ||
| ^.*-logo\..*$ | ||
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||
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| Original file line number | Diff line number | Diff line change |
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| @@ -1,4 +1,5 @@ | ||
| # Generated by roxygen2: do not edit by hand | ||
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| export(ws_download) | ||
| export(ws_get) | ||
| export(ws_subset) |
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,120 @@ | ||
| #' Download HWSD v2.0 data | ||
| #' | ||
| #' Downloads both the database and gridded HWSD v2.0 data products | ||
| #' to a desired output path for subsetting. | ||
| #' | ||
| #' When an existing path is used which is not the temporary directory | ||
| #' an environmental variable WS_PATH will be set. This variable will | ||
| #' override the default temporary directory if it exists. This allows | ||
| #' the gridded data to be stored elsewhere and be forgotten (while using the | ||
| #' {hwsdr} package for HWSD v2.0). | ||
| #' | ||
| #' Should you delete the gridded file, than it can be downloaded again but | ||
| #' the environmental variable should be set again using the new_path = TRUE | ||
| #' flag. | ||
| #' | ||
| #' @param ws_path the path / directory where to store the HWSD v2.0 database | ||
| #' @param new_path update the path, i.e. dowload data to a new local | ||
| #' location (logical, default FALSE) | ||
| #' | ||
| #' @return current data path | ||
| #' @export | ||
| #' | ||
| #' @examples | ||
| #' | ||
| #' \dontrun{ | ||
| #' | ||
| #' # Download the gridded soil map of | ||
| #' # HWSD v2.0 to the temporary directory | ||
| #' ws_download() | ||
| #' | ||
| #' # download the same data to a specific | ||
| #' # directory (which should exist) | ||
| #' ws_download( | ||
| #' ws_path = "~/my_path" | ||
| #' ) | ||
| #' | ||
| #' # download the same data to a specific | ||
| #' # directory (which should exist) and | ||
| #' # update the environmental variable | ||
| #' ws_download( | ||
| #' ws_path = "~/my_path", | ||
| #' new_path = TRUE | ||
| #' ) | ||
| #' } | ||
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| ws_download <- function( | ||
| ws_path = file.path(tempdir(), "ws_db"), | ||
| new_path = FALSE | ||
| ) { | ||
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| # check if environmental variable is set | ||
| # if so use dir as overriding location | ||
| if(Sys.getenv("WS_PATH") != "" & !new_path ) { | ||
| ws_path <- Sys.getenv("WS_PATH") | ||
| } | ||
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| if (ws_path == file.path(tempdir(), "ws_db")) { | ||
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| message( | ||
| sprintf( | ||
| "Creating temporary HWSD v2.0 files at:\n %s", ws_path ) | ||
| ) | ||
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| # create storage path | ||
| if (!dir.exists(ws_path)) { | ||
| dir.create(ws_path, recursive = TRUE) | ||
| } | ||
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| } else { | ||
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| if (!dir.exists(ws_path)) { | ||
| stop( | ||
| "Database directory does not exist, please create the directory first!" | ||
| ) | ||
| } else { | ||
|
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| if(Sys.getenv("WS_PATH") == "" | new_path) { | ||
| Sys.setenv("WS_PATH" = ws_path) | ||
| } | ||
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| if (file.exists(file.path(ws_path, "HWSD2.bil"))) { | ||
| message("Grid file exists, skipping download!") | ||
| return(ws_path) | ||
| } | ||
| } | ||
| } | ||
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| # grab urls | ||
| urls <- server(version = "2.0") | ||
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| # download zipped gridded data | ||
| httr::GET( | ||
| urls$grid, | ||
| httr::write_disk( | ||
| file.path(ws_path, "hwsd2_raster.zip"), | ||
| overwrite = TRUE | ||
| ) | ||
| ) | ||
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| utils::unzip( | ||
| file.path(ws_path, "hwsd2_raster.zip"), | ||
| exdir = ws_path | ||
| ) | ||
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| # clean up zip files | ||
| status <- file.remove( | ||
| c( | ||
| file.path(ws_path, "hwsd2_raster.zip") | ||
| ) | ||
| ) | ||
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| message( | ||
| sprintf( | ||
| "Saving HWSD v2.0 files in at:\n %s", ws_path ) | ||
| ) | ||
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| # exit statement | ||
| message("Downloaded HWSD v2.0 files") | ||
| return(ws_path) | ||
| } |
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