Computer program product comprising instructions for implementing a method for simplifying a geometry model, when this program is executed by one or more processors, the method comprising: /a/ receiving said geometry model comprising a plurality of points ( p i ), each point of the plurality being associated with an error measurement ( Q i ); /b/ for each current point ( p i ) of said geometry model, - determining a Morton code associated with the current point ( p i ) as a function of coordinates ( Q i ) of said current point; - determining an integral error measurement ( Q i S ) defined as being a function of a sum of the error measurements that are associated with the points of the plurality having an associated Morton code that is lower than the Morton code associated with the current point; /c/ determining whether a given set of points of the plurality can be simplified by a new point, the points of the given set all being the points of the plurality having a Morton code associated with one and the same prefix of given length, as a function at least of a difference between: - the integral error measurement Q las S determined for the point of the given set having the largest Morton code (las); and - the integral error measurement Q ini − 1 S determined for the point of the plurality having a Morton code (ini-1) that is immediately lower than the smallest Morton code out of the Morton codes associated with the points of the set. /a/ receiving said geometry model comprising a plurality of points ( p i ), each point of the plurality being associated with an error measurement ( Q i ); /b/ for each current point ( p i ) of said geometry model, - determining a Morton code associated with the current point ( p i ) as a function of coordinates ( Q i ) of said current point; - determining an integral error measurement ( Q i S ) defined as being a function of a sum of the error measurements that are associated with the points of the plurality having an associated Morton code that is lower than the Morton code associated with the current point; - determining a Morton code associated with the current point ( p i ) as a function of coordinates ( Q i ) of said current point; - determining an integral error measurement ( Q i S ) defined as being a function of a sum of the error measurements that are associated with the points of the plurality having an associated Morton code that is lower than the Morton code associated with the current point; /c/ determining whether a given set of points of the plurality can be simplified by a new point, the points of the given set all being the points of the plurality having a Morton code associated with one and the same prefix of given length, as a function at least of a difference between: - the integral error measurement Q las S determined for the point of the given set having the largest Morton code (las); and - the integral error measurement Q ini − 1 S determined for the point of the plurality having a Morton code (ini-1) that is immediately lower than the smallest Morton code out of the Morton codes associated with the points of the set. - the integral error measurement Q las S determined for the point of the given set having the largest Morton code (las); and - the integral error measurement Q ini − 1 S determined for the point of the plurality having a Morton code (ini-1) that is immediately lower than the smallest Morton code out of the Morton codes associated with the points of the set. <EOS>