[GRASS-user] problem with reprojection of Hydro1k data

[Markus Neteler]

Stéphanie,

On Fri, Feb 13, 2009 at 2:18 PM, FAROUX STEPHANIE
<stephanie.faroux at meteo.fr> wrote:
> Hello,
> First i'd like to know if anybody already used the Hydro1k data from USGS?
> I try to make global maps of parameters from continental ones.
> The initial projection is lambert azimutal equal area, with different
> latitude and longitude of origins for different continents. I defined one
> location by continent; then i reprojected all maps in a latlon global
> location, with WGS84 datum.
> There are gaps between continents, for example between Asia and Europe and
> between Europe and Africa.
> I wonder if the problem comes:
> - from the data which don't perfectly cover the earth

... could be possible, I didn't try with Hydro1k data from USGS.

> - from my reprojection in grass

How did you do that? Say, did you use the v.in.region trick
mentioned in the r.proj manual page which helps a lot?

Markus