The method of data presentation and interpolation is a basic issue in 3D GIS

which will affect the management of spatial data and spatial analysis. It's a key problem for many functions of 3D GIS. Comparing several spatial data presentations

on the base of others research

the authors propose the simple based geospatial data presentation

abstract geoobjects as point

line

surface

and body. Then their logical design and topological relation are given. For visiualization and rebuilding of geoobject

simple based interpolation methods are introduced.