Neels,
The Worldview-3 satellite has different resolutions in the different bands.
There is a panchromatic band that has 31 cm resolution, but the multispectral
bands have 124 cm (1.2 m) resolution. You are probably seeing objects with the
panchromatic band, but NDVI has to use the coarser multispectral bands.
Some of the Worldview data products use the panchromatic band to "sharpen" the
multispectral images, but the multispectral data is fundamentally four times
coarser than the panchromatic bands. If the multispectral bands have been
resampled (interpolated) to the 31 cm pixel size to match the panchromatic
band, they will be fuzzier.
++Eric
Date: Fri, 7 May 2021 18:27:39 +0000
From: Neels Brink <[email protected]>
Yes, the raster calculator, and the extent (resolution, nr of pixels,
everything) of the output file matches that of the two input bands. What is
interesting is that I noted that the boundaries of some man-made objects do no
show this fuzziness:
[cid:[email protected]]
From: Nicolas Cadieux <[email protected]>
Sent: Friday, May 7, 2021 6:27 PM
To: Neels Brink <[email protected]>
Subject: Re: [Qgis-user] NDVI resolution
Hi,
Did you use the raster calculator? If so, did you select the proper extent
and rows and columns in the output files?
Le 7 mai 2021 ? 11:56, Neels Brink
<[email protected]<mailto:[email protected]>> a ?crit :
?
I created an NDVI in QGis from Worldview -3 bands. However, the NDVI looks
?fuzzy?, or at lower resolution than the original bands. I tried to find a flag
or setting which causes this but do not see something like it. What could be
the reason for this appearance of the NDVI?
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