DownloadSingleDEM: Download DEM Sheet
In ECCC-MSC/Basin-Delineation: Finds upstream area and upstream stations
Description
Usage
Arguments
Details
Value
Description
downloads DEM tiles from
"http://ftp.geogratis.gc.ca/pub/nrcan_rncan/elevation" and unzips
them to a directory
Usage
1
DownloadSingleDEM(DEM_id, DEM_dir, replace = F, product = "CDED")
Arguments
DEM_dir
character string, path to directory where DEM tiles are stored.
This function creates a nested file hierarchy that matches that of the FTP site
replace
logical, degaults to FALSE, whether or not files should be
re-downloaded if they already exist in the DEM_dir directory
product
character string specifying which data product to get (one of
'CDEM', 'CDED', 'CDSM', or 'NED')
NTS
character string, name of NTS tile (e.g. '075C' or '014D03') or
USGS NED tile. If specified as a 250k tile (4 characters), a 250k tile will
be downloaded. If specified as a 50k tile (6 character) then a 50k tile will
be downloaded.
Details
CDED and CDEM are from NRCAN. NED uses USGS National Elevation Dataset.
Value
a vector of file paths to downloaded DEM files
ECCC-MSC/Basin-Delineation documentation built on June 9, 2019, 7:29 p.m.
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Description Usage Arguments Details Value
Description
downloads DEM tiles from "http://ftp.geogratis.gc.ca/pub/nrcan_rncan/elevation" and unzips them to a directory
Usage
1 | DownloadSingleDEM(DEM_id, DEM_dir, replace = F, product = "CDED")
|
Arguments
DEM_dir |
character string, path to directory where DEM tiles are stored. This function creates a nested file hierarchy that matches that of the FTP site |
replace |
logical, degaults to FALSE, whether or not files should be re-downloaded if they already exist in the DEM_dir directory |
product |
character string specifying which data product to get (one of 'CDEM', 'CDED', 'CDSM', or 'NED') |
NTS |
character string, name of NTS tile (e.g. '075C' or '014D03') or USGS NED tile. If specified as a 250k tile (4 characters), a 250k tile will be downloaded. If specified as a 50k tile (6 character) then a 50k tile will be downloaded. |
Details
CDED and CDEM are from NRCAN. NED uses USGS National Elevation Dataset.
Value
a vector of file paths to downloaded DEM files
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