Several typical cases can occur:
M(0, 1) : One unmatched map section () section,
M(1, 0) : One unmatched image section (
) section,
M(1, 1) : One section of
matched with one section of
,
M(1, c) : One section of
matched with several sections of
,
M(i, 1) : one section of
matched with several sections of
,
M(i, c) : i sections of
matched with c sections of
.
The results are studied on sections namely between two road crossing (most important points of a road network).