NAME
r.in.srtm.region - Creates a DEM from 3 arcsec SRTM v2.1 or 1 arcsec SRTM v3 tiles.
KEYWORDS
raster,
import,
SRTM
SYNOPSIS
r.in.srtm.region
r.in.srtm.region --help
r.in.srtm.region [-n21z] output=name username=string password=string [url=string] [local=name] [region=xmin,ymin,xmax,ymax] [memory=integer] [method=string] [resolution=float] [--overwrite] [--help] [--verbose] [--quiet] [--ui]
Flags:
- -n
- Fill null cells
- -2
- Import SRTM v2 tiles
- Default: Import SRTM v3 tiles
- -1
- Input is a 1-arcsec tile (default: 3-arcsec)
- -z
- Create zero elevation for missing tiles
- --overwrite
- Allow output files to overwrite existing files
- --help
- Print usage summary
- --verbose
- Verbose module output
- --quiet
- Quiet module output
- --ui
- Force launching GUI dialog
Parameters:
- output=name [required]
- Name for output raster map
- username=string [required]
- Username for authentication
- password=string [required]
- Password for authentication
- url=string
- Base URL to fetch SRTM tiles
- local=name
- Local folder with SRTM tiles
- Use local folder instead of URL to retrieve SRTM tiles
- region=xmin,ymin,xmax,ymax
- Import subregion only (default is current region)
- Format: xmin,ymin,xmax,ymax - usually W,S,E,N
- memory=integer
- Memory in MB for interpolation
- Default: 300
- method=string
- Resampling method to use for reprojection (required if location projection not longlat)
- Options: nearest, bilinear, bicubic, lanczos, bilinear_f, bicubic_f, lanczos_f
- nearest: nearest neighbor
- bilinear: bilinear interpolation
- bicubic: bicubic interpolation
- lanczos: lanczos filter
- bilinear_f: bilinear interpolation with fallback
- bicubic_f: bicubic interpolation with fallback
- lanczos_f: lanczos filter with fallback
- resolution=float
- Resolution of output raster map (required if location projection not longlat)
r.in.srtm.region imports all SRTM tiles covering the
current region or region extents given with
region into GRASS,
patches the tiles together and optionally interpolates holes for
SRTM V2.1. The SRTM V003 products are already void-filled.
r.in.srtm.region downloads
(SRTM product description)
Importantly, for the SRTM tiles download a user registration is needed at
https://urs.earthdata.nasa.gov/users/new
In the user profile, two specific applications must be approved in the "My application" tab:
- "LP DAAC Data Pool" application, and
- "Earthdata Search" application.
Import of SRTMGL1 V003 (1 arc seconds ~ 30m) covering the current computational region:
# run in LatLong location - Sicily East, Italy
g.region n=39 s=37 w=14 e=16 res=0:00:01 -p
# use own credentials here
r.in.srtm.region -1 user="my_nasa_user" password="my_nasa_pw" output=srtm_sicily_1arc memory=2000
r.univar srtm_sicily_1arc
Figure: Eta volcano (Sicily, Italy) shown in NVIZ
r.in.srtm,
r.in.nasadem (addon)
The Shuttle Radar Topography Mission
homepage at NASA's JPL (see also MEaSUREs Data Product Table - SRTM).
The SRTM v3 documentation.
SRTMGL1: NASA Shuttle Radar Topography Mission Global 1 arc second V003
NASA JPL. (2013). NASA Shuttle Radar Topography Mission Global 1 arc second. NASA LP DAAC. http://doi.org/10.5067/MEaSUREs/SRTM/SRTMGL1.003
M. Neteler, 2005.
SRTM and VMAP0 data in OGR and GRASS.
GRASS Newsletter, Vol.3, pp. 2-6, June 2005. ISSN 1614-8746.
Markus Metz
Reprojection support: Anika Bettge, mundialis
SOURCE CODE
Available at:
r.in.srtm.region source code
(history)
Latest change: Sunday Aug 18 16:05:40 2024 in commit: f9d320e265329f9ec47c8a5ff0ce4876aa53e3e0
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GRASS Development Team,
GRASS GIS 8.4.1dev Reference Manual