Support new dem format
Currently when you want to use dem capability for ortho or stereo, you need to provide a directory with dem file to OTB. In this dem directory you must provide dem compatible with gdal in tif, dted or hgt format.
However with new version of gdal you can read:
- in archive: for example the new copernicus dem at 30m is provided as tar file (example:
DEM1_SAR_DTE_30_20101225T214024_20130706T214205_ADS_000000_5891.DEM.tar) and could be nice to support them directly without unarchive. - on network: for example you can have the dem accessible into a bucket so support dem file on network could be nice
For the second point, an alternative could be to support a vrt file which reference tiles through for example /vsis3 syntax.