Discussion on the method of data updating in forest resources inventory management system;

Data Updating in Forest Resources GIS Based on ActiveX Components;

Methodology of feature change detection and matching in data updating;

Study on Data Update and Assistant Decision-making of Highway Information Manage System;

Study and Development on Silviculture Assistant Decision and Data Update System;

This paper discusses the establishment of urban fundamental GIS through introducing the data connotation of urban base geographic information,map scale,positioning precision,spatial topology relation,data revision and so on.

This paper described the principle and content of urban,basic,geographic data revision,analyzed data update processes,the application areas of work,prospect of PDA data revision based on wireless communi-cations and put forward the recommendations that using various data of finish construction survey to updat the be-sic geographic data taken by the executive legislation.

This paper provides the content of urban basic geographical informatio n firstly, and then discusses the data revision and maintenance of urban basic g eographical information, as well as the data application system.

The data renewal of forest resource archives based on GIS can reflect the dynamic changes of forest resources.

On the basis of analyzing the urban foundational database,the paper discussed the data-updating methods of urban foundational GIS and the questions about data-updating.

This research,based on the request above-mentioned,makes an exploration on the landuse data-updating on internet,and puts forward the data-updating machinism which.