venice is a mask utility program that reads a mask file (DS9 or fits type) and a catalogue of objects (ascii or fits type) to:
1. create a pixelized mask,
2. find objects inside/outside a mask,
3. or generate a random catalogue of objects inside/outside a mask.
The program reads the mask file and checks if a point, giving its coordinates, is inside or outside the mask, i.e. inside or outside at least one polygon of the mask.