SRTMDownloader

class pylayers.gis.srtm.SRTMDownloader(server='dds.cr.usgs.gov', directory='srtm/version2_1/SRTM3', cachedir='cache', protocol='http')

Bases: object

Automatically download SRTM tiles.

Methods Summary

createFileList()	SRTM data is split into different directories, get a list of all of them and create a dictionary for easy lookup.
createFileListHTTP()	Create a list of the available SRTM files on the server using HTTP file transfer protocol (rather than ftp).
downloadTile(continent, filename)	Download a tile from NASA’s server and store it in the cache.
ftpCallback(data)	Called by ftplib when some bytes have been received.
getTile(lat, lon)	Get a SRTM tile object.
loadFileList()	Load a previously created file list or create a new one if none is available.
parseFilename(filename)	Get lat/lon values from filename.

Methods Documentation

createFileList()

SRTM data is split into different directories, get a list of all of them and create a dictionary for easy lookup.

createFileListHTTP()

Create a list of the available SRTM files on the server using HTTP file transfer protocol (rather than ftp). 30may2010 GJ ORIGINAL VERSION

downloadTile(continent, filename)

Download a tile from NASA’s server and store it in the cache.

ftpCallback(data)

Called by ftplib when some bytes have been received.

getTile(lat, lon)

Get a SRTM tile object. This function can return either an SRTM1 or SRTM3 object depending on what is available, however currently it only returns SRTM3 objects.

loadFileList()

Load a previously created file list or create a new one if none is available.

parseFilename(filename)

Get lat/lon values from filename.