  In the search for binary systems inspiral signal in interferometric
gravitational waves detectors, one needs the generation and placement of a grid
of templates. We present an original technique for the placement in the
associated parameter space, that makes use of the variation of size of the
isomatch ellipses in order to reduce the number of templates necessary to cover
the parameter space. This technique avoids the potentially expensive
computation of the metric at every point, at the cost of having a small number
of ``holes'' in the coverage, representing a few percent of the surface of the
parameter space, where the match is slightly lower than specified. A study of
the covering efficiency, as well as a comparison with a very simple regular
tiling using a single ellipse is made. Simulations show an improvement varying
between 6% and 30% for the computing cost in this comparison.
