<div dir="ltr"><div dir="ltr">Based on the last email I am not sure if you want to include the CentralWavelenght and FWHM or not.<br></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Mon, 2 Sept 2024 at 18:24, Even Rouault <<a href="mailto:even.rouault@spatialys.com">even.rouault@spatialys.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">ok, so based on all feedback, I guess we could add GCI_PanBand, <br>
GCI_CoastalBand, GCI_RedEdgeBand, GCI_NIRBand, GCI_SWIRBand, <br>
GCI_MWIRBand, GCI_LWIRBand, + maybe GCIThermalRBand (that one with <br>
overlap with MWIR and LWIR), without loosing too much generality + maybe <br>
GCI_OtherIRBand for whatever other uses ? I realize we already have a <br>
GCI_YellowBand, although it is thought for the CMYK color space. Do we <br>
need a GCI_YellowSpectralBand enumeration value... ?<br>
<br>
The documented associated wavelengths range for those constants could be <br>
the ones of <br>
<a href="https://github.com/stac-extensions/eo?tab=readme-ov-file#common-band-names" rel="noreferrer" target="_blank">https://github.com/stac-extensions/eo?tab=readme-ov-file#common-band-names</a> <br>
but with a warning that they are indicative only, and some sensors could <br>
partially intersect the range, and that the wavelength metadata when <br>
present has precedence.<br>
<br>
><br>
> In Pix4D, for the radiometric correction needed in the images, we <br>
> defined this XMP namespace years ago:<br>
> <a href="http://pix4d.com/camera/1.0/" rel="noreferrer" target="_blank">http://pix4d.com/camera/1.0/</a><br>
> There are "Xmp.Camera.CentralWavelength", "Xmp.Camera.WavelengthFWHM" <br>
> and "Xmp.Camera.BandName". I do not mean that we should do the same, <br>
> but just an example of how that information was important.<br>
><br>
> One question. The IMAGERY metadata is available only on TIF, or also <br>
> in other file formats like JPG? I mean without any sidecar.<br>
<br>
This is per-se generic, but in practice, only the TIFF driver currently <br>
fills it from the sidecar files of various metadata producers <br>
(DigitalGlobe, Pleiades, etc.). It could also be stored in the GDAL <br>
.aux.xml side car file for any PAM capable driver (the STACIT driver <br>
could use the STAC eo metadata to also set the new GCI_ constant and the <br>
wavelength metadata items, when present). The Sentinel2 driver also <br>
could fill that. As well as the ENVI one when the metadata items are <br>
present.<br>
<br>
<br>
-- <br>
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<br>
</blockquote></div></div>