The invention relates to a
mass model
data browsing method based on a three-dimensional digital city
system. The method includes the first step of generating a geographic information
mass three-dimensional model, and the second step of calculating rapid lookup units within a geographic coordinate range according to the geographic coordinate range in a three-dimensional digital city
system window, finding out required three-dimensional
monomer models from the rapid lookup units, finding out the required three-dimensional
monomer models in a
database, calculating the distances between a viewpoint and centers of the three-dimensional
monomer models, loading models at corresponding levels in the
database into a memorizer according to the distances, finding out invisible parts of the models through calculation of model data at classified levels and releasing the invisible parts of the models out of the memorizer, placing visible parts of the models into a graphic drawing pipeline of a
graphics card, and finally displaying the visible parts of the models in the three-dimensional digital city
system. According to the
mass model
data browsing method based on the three-dimensional digital city system, the monomer models in the mass three-dimensional model can be rapidly displayed, the time is short, the efficiency is high, and the requirement for hardware is low.