Superview 1 image orthorectification

OTB Usage
1

Dear all,
Is it possible to orthorectify Superview 1 images using OTBCLI? This satellite sensor has the following spectral bands and acquired images come with RPC file.

Spectral bands:

  • PAN: 0.45-0.89 µm
  • B1/blue: 0.45-0.52 µm
  • B2/green: 0.52-0.59 µm
  • B3/red: 0.63-0.69 µm
  • B4/NIR: 0.77-0.89 µm

GSD (nadir):

  • PAN: 0.5 m
  • MS: 2 m

It is not on the supported sensor list but will it be possible to tweak some parameters to make it work?

Many thanks.

2

Hi,

Yes, it works. You can use OrthoRectification application as you would use it for another sensor.
I also made some tests on PanSharpening and it works fine as well.

Do you need more help to fix the parameters ?

Best regards,

Yannick

3

Sorry @yannick, I didn’t see this message until today. Yes, I need some help to fix the parameters.

Many thanks.
Pritimoy

4

Hi,

You can simply use the application like this :
otbcli_OrthoRectification -io.in yourSuperviewImage.tif -io.out yourImage_ortho.tif

You shall also give some information about the map projection you want to obtain :
Ex : -map utm -zone yourZoneNumber
or alternatively, you can use epsg code

Finally, you should also set up the elevation parameters :

  • a DEM can be used (-elev.dem )
  • a geoid is also needed (-elev.geoid )
    ex : if you use SRTM tiles, you can use an EGM96 geoid file.

You can also have a look at our Cookbook, that gives a lot of explanations (https://www.orfeo-toolbox.org/CookBook/recipes/optpreproc.html#ortho-rectification-and-map-projections)

Hope that it can help you.

5

Many thanks. I will try it.

Pritimoy