Based on the last email I am not sure if you want to include the CentralWavelenght and FWHM or not.
On Mon, 2 Sept 2024 at 18:24, Even Rouault <even.roua...@spatialys.com> wrote: > ok, so based on all feedback, I guess we could add GCI_PanBand, > GCI_CoastalBand, GCI_RedEdgeBand, GCI_NIRBand, GCI_SWIRBand, > GCI_MWIRBand, GCI_LWIRBand, + maybe GCIThermalRBand (that one with > overlap with MWIR and LWIR), without loosing too much generality + maybe > GCI_OtherIRBand for whatever other uses ? I realize we already have a > GCI_YellowBand, although it is thought for the CMYK color space. Do we > need a GCI_YellowSpectralBand enumeration value... ? > > The documented associated wavelengths range for those constants could be > the ones of > https://github.com/stac-extensions/eo?tab=readme-ov-file#common-band-names > but with a warning that they are indicative only, and some sensors could > partially intersect the range, and that the wavelength metadata when > present has precedence. > > > > > In Pix4D, for the radiometric correction needed in the images, we > > defined this XMP namespace years ago: > > http://pix4d.com/camera/1.0/ > > There are "Xmp.Camera.CentralWavelength", "Xmp.Camera.WavelengthFWHM" > > and "Xmp.Camera.BandName". I do not mean that we should do the same, > > but just an example of how that information was important. > > > > One question. The IMAGERY metadata is available only on TIF, or also > > in other file formats like JPG? I mean without any sidecar. > > This is per-se generic, but in practice, only the TIFF driver currently > fills it from the sidecar files of various metadata producers > (DigitalGlobe, Pleiades, etc.). It could also be stored in the GDAL > .aux.xml side car file for any PAM capable driver (the STACIT driver > could use the STAC eo metadata to also set the new GCI_ constant and the > wavelength metadata items, when present). The Sentinel2 driver also > could fill that. As well as the ENVI one when the metadata items are > present. > > > -- > http://www.spatialys.com > My software is free, but my time generally not. > >
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