[GRASS5] contradiction for v.overlay

GRASS GIS GRASS GIS developer
1

Hi,

there is a contradiction between the manual and the g57 tutorial for v.overlay:

a) v.overlay -help:

operator:
         and : also known as 'intersection' in GIS
         or : also known as 'union' in GIS (only for atype=area)
   ...

b) in the tutorial it says the opposite:

Vector union (AND):
v.overlay ainput=polbnda_germany binput=clipmap output=clipmap_union operator=and -t

Vector intersection (OR):
v.overlay ainput=polbnda_germany binput=clipmap output=clipmap_intersection operator=or -t

I guess the manual is correct and the tutorial has to be changed.

  Otto

2

On Mon, Nov 15, 2004 at 05:40:10PM +0100, Otto Dassau wrote:

Hi,

there is a contradiction between the manual and the g57 tutorial for v.overlay:

a) v.overlay -help:

operator:
         and : also known as 'intersection' in GIS
         or : also known as 'union' in GIS (only for atype=area)
   ...

b) in the tutorial it says the opposite:

Vector union (AND):
v.overlay ainput=polbnda_germany binput=clipmap output=clipmap_union operator=and -t

Vector intersection (OR):
v.overlay ainput=polbnda_germany binput=clipmap output=clipmap_intersection operator=or -t

I guess the manual is correct and the tutorial has to be changed.

Thanks, I have modified the turorial.

Markus