By　researching　on　data　modeling　for　complicated　entities,　a　star　model　based　on　extended-relational　database　was　designed　to　present　the　3D　landscape.　This　model　can　not　only　reduce　the　complexity　and　amounts　of　data　of　3D　landscape,　but　also　make　full　use　of　the　organization　manipulating　and　controlling　function　that　the　relational　database　has,　so　it　can　support　different　display　manner　for　landscape　effectively.