Research On Map API Of Common Platform Of Geographic Information For Digital City

Digital city starts with Digital City Geography Space Frame construction demonstration project which was launched by National Administration of Surveying and Mapping in 2006, it's goal is to complete all 333 prefecture-level cities and county-level cities of the construction of digital city at the end of the 12th Five-Year Plan, and realize interconnection between provincial cities and counties. So far morn than 130 cities had completed the digital city's construction work.As an important part of digital city's Software infrastructure, common platform of geographic information becomes main point of the construction of digital city.Because of lightweight,feature-rich, scalability, Supportting the personalized secondary development to the platform,Map API has become an important technology characteristics of common platform of geographic information.However during the construction process, construction thoughts,models, technologies, frame structure, classification are different,this paper mainly studies the Technical components, frame structure, classification,interface design of common platform of geographic information Map API. Works done in this paper are as follows:Firstly,compared common platform of geographic information Map API with internet Maps API,designed frame structure of common platform of geographic information Map API from data source, technical framework, classification and function. Divide common platform of geographic information Map API into Map Operation Interface Class which contains Map Class,Base Class,Layer Class,Control Class,Tool Class etc and Data Service Interface which contrains OGC standard Interface and platform scalable Interface.Secondly,on the basis of the new Maps API framework and classification, refine the design of the Maps API in accordance with function,formed a set of NJNU Map API, and described the interface of NJNU Map API detailedly.Finally, using REST-style technical designed and implemented Digital Lishui tax administration system based on NJNU Map API. Summarized the method of using the API and implemention steps.Verified the availability and stability of the NJNU Map API.