[GRASS-user] Importing USGS' wrs2_descending Shapefile

[Nikos Alexandris]

Nikos Alexandris:

>>> I can't get wrs2_descending.shp file (from
>>> <http://landsat.usgs.gov/documents/wrs2_descending.zip>) to import
>>> sans errors (grass7).  No matter the snap threshold.  Anyone 
>>> recently
>>> imported it?

Markus Neteler wrote:

> I think that their overlapping areas cannot be represented as pure
> topological model.

Right.

> Hence, you need to maintain them (AFAIK it is the -c option in 
> v.in.ogr).
> Please correct me if I am wrong.

I'll do so.

> The question is: what's you scope? Visualization?

A complete set of tools for Landsat data, inside GRASS, requires a 
proper trimming utility.  The existing add-on  i.landsat.trim  does not 
satisfy my needs.

Using a slightly modified version of  
<ttps://github.com/robintw/LatLongToWRS>,  which I'll integrate into (my 
yet-unifinished personal mini-project) <i.landsat.wrs2trim>, one will 
simply need to tell which landsat scene(s) (or, optionally, the desired 
path & row combination(s)) should be border-pixel-trimmed.

I've decided to go the hardway, meaning, let the user or the script, 
get the "wrs2_descending.shp" file, import it in GRASS and let the 
module do its work.  Or, perhaps, share along with the module a clean 
vector data set (in GRASS' native format? compressed?).

Nikos