Download or list SRTM tiles related to a set of images

Download or list SRTM tiles related to a set of images

Detailed description

This application allows selecting the appropriate SRTM tiles that covers a list of images. It builds a list of the required tiles. Two modes are available: the first one download those tiles from the USGS SRTM3 website (http://dds.cr.usgs.gov/srtm/version2_1/SRTM3/), the second one list those tiles in a local directory. In both cases, you need to indicate the directory in which directory tiles will be download or the location of local SRTM files.

Parameters

This section describes in details the parameters available for this application. Table [1] presents a summary of these parameters and the parameters keys to be used in command-line and programming languages. Application key is DownloadSRTMTiles .

[1]	Table: Parameters table for Download or list SRTM tiles related to a set of images.

Parameter Key	Parameter Type	Parameter Description
il	Input image list	Input image list
mode	Choices	Choices
mode download	Choice	Download
mode list	Choice	List tiles
mode.download.outdir	Directory	Directory
mode.list.indir	Directory	Directory
inxml	XML input parameters file	XML input parameters file
outxml	XML output parameters file	XML output parameters file

Input images list The list of images on which you want to determine corresponding SRTM tiles.

Download/List corresponding SRTM tiles.

Available choices are:

• Download : Download corresponding tiles on USGE server.

• Output directory : Directory where zipped tiles will be save. You’ll need to unzip all tile files before using them in your application.
• List tiles : List tiles in an existing local directory.

• Input directory : Input directory where SRTM tiles can are located.

Load otb application from xml file Load otb application from xml file.

Save otb application to xml file Save otb application to xml file.

Example

To run this example in command-line, use the following:

otbcli_DownloadSRTMTiles -il QB_Toulouse_Ortho_XS.tif -mode list -mode.list.indir /home/user/srtm_dir/

To run this example from Python, use the following code snippet:

#!/usr/bin/python

# Import the otb applications package
import otbApplication

# The following line creates an instance of the DownloadSRTMTiles application
DownloadSRTMTiles = otbApplication.Registry.CreateApplication("DownloadSRTMTiles")

# The following lines set all the application parameters:
DownloadSRTMTiles.SetParameterStringList("il", ['QB_Toulouse_Ortho_XS.tif'])

DownloadSRTMTiles.SetParameterString("mode","list")

DownloadSRTMTiles.SetParameterString("mode.list.indir", "/home/user/srtm_dir/")

# The following line execute the application
DownloadSRTMTiles.ExecuteAndWriteOutput()

Limitations

None

Authors

This application has been written by OTB-Team.