  The city reading proposed is a modern postmodern urbanism approach which
quantifies but by passing through subjectivism. The isobenefit lines shown
translate cities into benefit landscapes, subjective and continually changeable
according to personal moods needs preferences and urban transformations. They
read attractiveness and how they flow throughout the city. Doing it for each
urban point and for each urban attraction, we obtain the isobenefit orography
of the city, namely a map of its urban attractions and of their flows. This is
a liquid surface rather than solid, as it varies across time and people. It is
in this liquidness where resides the complexity of cities, their bottom up
spirit and the dynamicity of equilibriums and networks. People do not
necessarily go in the most accessible points, but where they need and want to,
and, they flow through paths they need or choose to pass through. It is also
introduced the likeability of places and paths: in addition to the usual
parameters currently used, which weight distances in terms of physical
distance, cost, time or mental easiness representations, psycho-economical
distances used in the isobenefit lines proposed here, also consider how a place
and a path pleases us. According to the Underground Hedonic Theory, this
pleasure to pass through or to stay in agreeable areas has an underground and
an inertia effect too which contributes to delight our lives. The final purpose
of the science of cities and urban design is to understand cities and make them
efficient and attractive to please our lives in them.
