FetchAndExtractCRSFromIndex: LidarIndexR - Retrieve a shapefile (all files) and read CRS...

In bmcgaughey1/LidarIndexR: Provides functions to build index files for lidar projects

LidarIndexR – Retrieve a shapefile (all files) and read CRS information

Description

Retrieves all files related to a shapefile (same name as fileName but different extensions) and then reads CRS information from the projection file.

Usage

FetchAndExtractCRSFromIndex(
  baseURL,
  folderName,
  fileName,
  tempFolder,
  fetchnew = FALSE,
  quiet = FALSE,
  ...
)

Arguments

baseURL	URL for a folder on a remote host. Trailing slash should not be included.
folderName	Folder name on the baseURL containing the shapefile.
fileName	A string containing the name of a single file. All files with the same name (but different extensions) will be retrieved. The projection file is then read to provide CRS information.
tempFolder	A valid folder name where the files can be temporarily stored.
fetchnew	Boolean. If TRUE, the files are always retrieved. If FALSE, the files are only retrieved if they do not already exist in the tempFolder.
quiet	Boolean to control display of status information. If TRUE, information is not displayed. Otherwise, status information is displayed.
...	Arguments passed to RCurl::getURL().

Value

String (invisible) containing a valid input value for st_crs().

Examples

## Not run: 
FetchAndExtractCRSFromIndex("ftp://rockyftp.cr.usgs.gov/vdelivery/Datasets/",
    "Staged/Hydrography/NHD/HU4/HighResolution/Shape/",
    "NHD_H_0101_HU4_Shape.shp",
    ".")

## End(Not run)

bmcgaughey1/LidarIndexR documentation built on April 14, 2025, 6:07 p.m.