[GRASS-Italia] Riempire un oggetto vettoriale

[caneta]

Mi viene riportato il seguente errore e non mi viene creata nessuna immagine
di output:
v.type input=perimetro_lat_lon a PERMANENT output=aree a PERMANENT
type=line,boundary
Building topology for vector map <aree>...
Registering primitives...
2 primitives registered
4350 vertices registered
Building areas...
0 areas built
0 isles built
Attaching islands...
Attaching centroids...
Number of nodes: 4
Number of primitives: 2
Number of points: 0
Number of lines: 0
Number of boundaries: 2
Number of centroids: 0
Number of areas: 0
Number of isles: 0
Number of incorrect boundaries: 2


Idee?

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