
An inhomogeneous Poisson process that has intensity function
is a point process in which the number of points that fall in a spatial region W,
has the following expectation:
![\[ \mathbb {E}[N(X\cap W)] = \int _ W \lambda (s) ds \]](images/statug_spp0165.png)
Also, the
points are independent and identically distributed for disjoint subsets W with a probability density of
![\[ f(s) = \frac{\lambda (s)}{\int _ W \lambda (s)ds} \]](images/statug_spp0166.png)
.