Re: [gdal-dev] Potential issue with Sentinel-1 SAFE driver

2016-05-17 Thread Julien Michel
Le 14/05/2016 11:28, Alessandro Amici a écrit : the internal structure of the single SLC subswath is where the real mess starts. The tiff in the measurement folder are not actual images, but are a container of tiles with black borders separating them. In the metadata there are all the informati

Re: [gdal-dev] Potential issue with Sentinel-1 SAFE driver

2016-05-15 Thread Delfim Rego
https://trac.osgeo.org/gdal/ticket/6514 On Sun, May 15, 2016 at 12:43 PM, Delfim Rego wrote: > Hi Alessandro, > > Thank you for your comments. > > I also use SLC products for running detection algorithms, but for that > I just access xml metadata and measurement data directly using the > GTiff dr

Re: [gdal-dev] Potential issue with Sentinel-1 SAFE driver

2016-05-15 Thread Delfim Rego
Hi Alessandro, Thank you for your comments. I also use SLC products for running detection algorithms, but for that I just access xml metadata and measurement data directly using the GTiff driver. Nevertheless, the SAFE driver should open all product types for as most usecases as possible, either

Re: [gdal-dev] Potential issue with Sentinel-1 SAFE driver

2016-05-14 Thread Alessandro Amici
Delfim, as I've been mostly lurking gdal-dev up to now, first a brief intro of myself: I'm a long time GDAL user, I contribute a bit to it and even had commit access back in 2003/2004. I've been involved in writing a driver for Sentinel-1 SLC data for a customer first and then reimplemented a subs

Re: [gdal-dev] Potential issue with Sentinel-1 SAFE driver

2016-05-13 Thread Alessandro Amici
Even, furthermore subswaths typically have different pixel and line sizes. But the subswath level is easy bit of Sentinel-1 data, the real fun starts as you note that every individual tiff file is a collection of actual image segments (the bursts) interleaved with black stripes. The image segment

Re: [gdal-dev] Potential issue with Sentinel-1 SAFE driver

2016-05-13 Thread Even Rouault
> This is obviously wrong, since pixels in each swath correspond to > different observed ground points. In other word, there is no meaning in > stacking the response of pixel (0,0) of swath one with pixel (0,0) of > swath two, since they do not observe the same target landscape. > > I think the b

[gdal-dev] Potential issue with Sentinel-1 SAFE driver

2016-05-13 Thread Julien Michel
Dear all, I recently gave a try to the Sentinel-1 SAFE driver and I came accross something that to my opinion is conceptually wrong. A Sentinel 1 product consists in one or several tiff file along with their annotation files. Dependening on product level and acquisition mode, those tiff file