[GRASS5] v.out.ascii truncation

[Greg Sepesi]

Thanks Hamish.  That output looks good.

As you suggested I ran g.region and d.what.sites.

- - -

GRASS:~ > g.region -p
projection: 3 (Latitude-Longitude)
zone:       0
datum:      ** unknown (default: WGS84) **
ellipsoid:  wgs84
north:      37:30:36N
south:      37:22:12N
west:       79:15W
east:       79:07:12W
nsres:      0:00:36
ewres:      0:00:36
rows:       14
cols:       13

GRASS:~ > d.what.sites
[...]
Click mouse button on desired location
 
 
79:13:59.52W(E) 37:26:29.04N(N)
road.test.t in PERMANENT  79:13:59.304W|37:26:29.4288N 62735861

- - -

I hadn't paid much attention to g.region's nsres and ewres or rows and
cols because I thought those affected only raster operations, and I've
been using just vector operations.  And it appears that v.out.ascii
doesn't truncate to g.region's nsres and ewres of 0:00:36 (0.01
degrees).

Concerning d.what.sites, I hadn't used this operation before but its
reporting of latitude with more fractional digits than longitude is
consistent with v.out.ascii.

Looking at the input data, U.S. Census Bureau TIGER data has six
fractional digits for both latitude and longitude.  Those six fractonal
digits for latitude and longitude are retained in the m.in.stf1.tape
intermediate input step.  However I'm not sure what happens in and after
v.in.tig.basic ... I have lots to learn about GRASS.

Greg

Hamish wrote:
> 
> ok, here you go (5.0.3CVS),  v.out.ascii output:
> [...]
> ZONE:         0
> WEST EDGE:    166.25922773
> EAST EDGE:    168.73890751
> SOUTH EDGE:   -47.33126239
> NORTH EDGE:   -44.17953637
> MAP THRESH:   0
> VERTI:
> A  84946
>  -46.22802974 167.02094088
>  -46.22801981 167.02092309
>  -46.22800988 167.02090529
>  -46.22800988 167.02090529
>  -46.22800988 167.02090529
>  -46.22795726 167.02081077
>  -46.22786854 167.0205745
>  -46.2277771  167.02021374
>  -46.22761506 167.01979546
>  -46.22745475 167.01923402
> 
> Are you sure your input data isn't rounded at 5 sig.fig.?
> v.to.sites -a
> d.what.sites
> ?
> g.region -p
> ?
> > - - -
> >
> > WEST EDGE:    -79.26619
> > EAST EDGE:    -79.08578
> > SOUTH EDGE:   37.340556
> > NORTH EDGE:   37.469409
> > MAP THRESH:   0
> > VERTI:
> > A  2
> >  37.444541    -79.16844
> >  37.448141    -79.17404
> > A  11
> >  37.448141    -79.17404
> >  37.448963    -79.17539
> >  37.449241    -79.17584
> >  37.453221    -79.17876
> >  37.453741    -79.17914
> >  37.458141    -79.18474
> >  37.458477    -79.18525
> >  37.458893    -79.18563
> >  37.459341    -79.18582
> >  37.459661    -79.18592
> >  37.460845    -79.18638