Study Of WalkGIS Spatial-temporal Data Model And The Application In Land Use Planning System

As the land use planning continued to develop, a variety of historical data need to be inquired and retrieved more frequently, then the land administrative requires the new current mothed of data management.This paper discusses the research and design of spatial-temporal relational model in WalkGIS platform, which complies to the OpenGIS standards. The paper falls under the context of National High-tech Supporting project.WalkGIS spatial-temporal relational model aims at spatial-temporal objects, and one spatial-temporal relation object corresponds to several tense instances when the traditional object relation model for one instance with several tenses. WalkGIS spatial-temporal relational model establishes and maintains constraints and relationship in spatial objects and temporal-serial instance relationship, performs the transformation of object-based discreet relationship(object-relation) to object-based spatial-temporal relationship(object-spatial temporal relation), creates and constraints temporal relation of instances in different times for one object and instance spatial relationship at different times. This article focuses on temporal model management and design for the objectified spatial-temporal model.Spatial-temporal model supports multi-user and multi-scene. Firstly, multi-user online editing. Secondly, stream model. Thirdly, offline capabilities. Fourthly, version compression. Fifthly, version transfer.The article will use WalkGIS spatial-temporal data model and the data of land use planning to realize the function of element extraction, version derivation and version submission to the current and historical data according to a series of experiment.This paper covers spatial-temporal model definitions, model application scenario, model design constraints, version conflicts and reconciliation, data structure design, version management design, etc...