vapour_vsi_list: Read GDAL virtual source contents

In vapour: Access to the 'Geospatial Data Abstraction Library' ('GDAL')

Read GDAL virtual source contents

Description

Obtain the names of available items in a virtual file source.

Usage

vapour_vsi_list(dsource, ...)

Arguments

dsource	data source name (path to file, connection string, URL) with virtual prefix, see Details
...	ignored

Details

The dsource must begin with a valid form of the special vsiPREFIX, for details see GDAL Virtual File Systems.

Note that the listing is not recursive, and so cannot be used for automation. One would use this function interactively to determine a useable ⁠/vsiPREFIX/dsource⁠ data source string.

Value

character vector listing of items

Examples

pointzipfile <- system.file("extdata/vsi/point_shp.zip", package = "vapour")
vapour_vsi_list(sprintf("/vsizip/%s", pointzipfile))

## Not run: 
## example from https://github.com/hypertidy/vapour/issues/55
#file <- "http/radmap_v3_2015_filtered_dose/radmap_v3_2015_filtered_dose.ers.zip"
#url <- "http://dapds00.nci.org.au/thredds/fileServer/rr2/national_geophysical_compilations"
#u <- sprintf("/vsizip//vsicurl/%s", file.path(url, file))
#vapour_vsi_list(u)
#[1] "radmap_v3_2015_filtered_dose"     "radmap_v3_2015_filtered_dose.ers"
#[3] "radmap_v3_2015_filtered_dose.isi" "radmap_v3_2015_filtered_dose.txt"
#gdalinfo /vsitar//home/ubuntu/LT05_L1GS_027026_20060116_20160911_01_T2.tar.gz
#vapour_vsi_list("/vsitar//home/ubuntu/LT05_L1GS_027026_20060116_20160911_01_T2.tar.gz")
#"LT05_L1TP_027026_20061218_20160911_01_T1_ANG.txt"
#"LT05_L1TP_027026_20061218_20160911_01_T1_B1.TIF"
#"LT05_L1TP_027026_20061218_20160911_01_T1_B2.TIF"
#"LT05_L1TP_027026_20061218_20160911_01_T1_B3.TIF"
#...

## End(Not run)

vapour documentation built on June 22, 2024, 10:01 a.m.