Based on the land-use data,the paper discusses the arithmetic applied and realized of Delaunay triangle networks applying in polygons generalization and punctate objects generalization of land data type, describes the realized progress and the exprerimentation result of the two arithmetics.

After description of current regionalization methods on natural disaster, this paper puts forward a new method which use the bottom--up region combination based on the basic unit theory.

Temperature Effects on Pathogenicity of White Spot Syndrome Baculovirus;

The comparative experiments on the prevention and control of the white spot syndrome of Penaeus monodon were made.

The realization of online cartographic generalization is quite difficult in cartography,with the development of graphic researches,models and methods are developed.

The cartographic generalization technology under digital environment becomes a key technology to maintain the map database.

This paper discusses the requirement of cartographic generalization:object selection because of imperceptibility,spatial feature congestion,coalescence resulted of scale down and intersection in generalization.

Syntax-based information quantity rule for automatic map generalization;

Building orientation is a fundamental spatial constraint in the process of map generalization.

Research on automatically accepting or rejecting linear geographic elements based on central place conception in cartographic generalization;

Research on displacement between streets and buildings in cartographic generalization;

This paper discusses the cartographic generalization modules that are based on GIS platform.