Using the case study of the central sec- tion of Yongningjiang River in Taizhou, Zhejiang province, this paper discusses possibility of building a grid city based on ecological infrastructure in steady of rigid road system and tested the compatibility be- tween the negative planning approach and the con- ventional grid city model.

Urban grid phenomenon and its landscape ecological effects are analysed in this paper.

By studying the technical framework of the urban grid management system and according to the actual situation of urban management,this paper discusses the development of technical framework,and puts forward the new technical framework model suitable for small and medium-sized cities.

In view of the quality control characteristics of component data in urban grid management,in this paper,staged sampling method is brought up for sampling single-width component data,at error rate,omission rate,precision error rate as the measuring index of component data quality,and the formula of the defect rate is derived.

according to demand of city grid management system,surveying way of municipal component is studied,digital surveying way is projected that would code component information in geography and attribute.