[GRASS-dev] make vector footprint orientated along track of satellite

GRASS GRASS developer
1

Hi all,

I have some OCO2 nc4 files (has points as vectors) and it says the pixel size should be 2kmx1.3km “along track” oriented.

Is there any GRASS module or trick that can help me generate the polygons hosts of these data point?

Thank you,
Yann

···

Dr. Yann Chemin
+33 7 83 85 5234
JRC, Ispra, IT

2

On Wed, Oct 16, 2019 at 3:11 PM Yann Chemin <dr.yann.chemin@gmail.com> wrote:

Hi all,

I have some OCO2 nc4 files (has points as vectors) and it says the pixel size should be 2kmx1.3km "along track" oriented.

Is there any GRASS module or trick that can help me generate the polygons hosts of these data point?

Maybe

https://grass.osgeo.org/grass78/manuals/v.mkgrid.html

with angle=xxx
?

Markus

3

(re-adding the list)

On Wed, Oct 16, 2019 at 4:08 PM Yann Chemin <dr.yann.chemin@gmail.com> wrote:

yes Markus that would be nice but the angle is actually changing for each point.
Only sending the screenshot to you as it is big.

Well, for that probably

https://grass.osgeo.org/grass78/manuals/m.cogo.html + v.in.ascii?

... in a Python script which addresses the changing angle.
Sounds also like a TGRASS topic: points moving in time.

Just some ideas...

Markus

4

Thank you Markus,
will dig that way…
Cheers,
Yann

···

Dr. Yann Chemin
+33 7 83 85 5234
JRC, Ispra, IT