Metadata reading from compound datasets

Summary

Improve the detection of metadata for sub-datasets ( SENTINEL1 SAFE, ...)

Rationale

It was implemented to solve #1589 (closed).

Implementation Details

Classes and files

In a nutshell, we can use the list of files attached to a dataset (see GDALDataset::GetFileList() ) as a final step when looking for OSSIM sensor models.

This list is stored in otb::ImageIOBase, empty by default. Only GDALImageIO can fill it for now. The ImageFileReader will try this list when no keywordlist has been found so far.

Tests

A tests has been added in OTBImageIO to verify the loading of a keywordlist from a VRT file.

Documentation

The SoftwareGuide has been updated (sensor model section).

Additional notes

The following use cases are now working:

Input path	Keywordlist detected ?
S1A_IW_SLC_[...].SAFE	Yes: IW1 image
S1A_IW_SLC_[...].SAFE/manifest.xml	Yes: IW1 image
SENTINEL1_DS:S1A_IW_SLC_[...].SAFE:IW2_VV	Yes: IW2 image
S1A_IW_SLC_[...].SAFE?sdataidx=2	Yes: IW3 image
iw1_vv_vh.vrt (stack of VV and VH)	Yes: IW1 VV image

As shown, it also works with VRT files, it can load the metadata from the first raster source. This enables the orthorectification of sensor images in a VRT stack.

At the moment, any geom file associate with an attached file is ignored, but this could be added if there is a valid use case.

Copyright

The copyright owner is COPYRIGHT OWNER (OR OWNER'S AGENT) and has signed the ORFEO ToolBox Contributor License Agreement.

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***Check before merging:***

• All discussions are resolved
• At least 2 votes from core developers, no vote.
• The feature branch is (reasonably) up-to-date with the base branch
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I still need to add specific tests and a proper documentation, however the core of the feature is done so you can give your feedback.

added 1 commit

• 12cbf569 - TEST: new test to validate reading of metadata inside compound datasets

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added 1 commit

• 0fec0519 - DOC: update SG description of sensor model detection

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unmarked as a Work In Progress

changed the description

added 1 commit

• a7818f11 - DOC: clarify S1 Safe product

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resolved all discussions

merged

mentioned in commit 61c61e24

mentioned in issue #1589 (closed)

added bug label

changed milestone to %7.0.0