1∶25万区域地质图空间数据库建设——以1∶25万都兰县幅建库为例

1∶250 000-Scale Regional Geological Map Spatial Database

1∶25万区域地质图空间数据库建设是首次依据新的《数字地质图空间数据库标准》,在当前空间数据库模型的典型代表地理数据库模型上建立的。该模型以研究实体为对象,把对象分为要素类和对象类,并通过关系类定义要素类与要素类、对象类与对象类、要素类与对象类的关系,同时采用关联、依赖、组合和继承来描述对象之间的关系规则来构成新的关联集合的技术,增强了数据库服务能力。通过空间粒度、描述粒度、语义粒度、存储粒度的相互关系与分割技术的研究,实现了与比例尺无关的地质图数据模型。

1 ： 250,000-Scale Regional Geologic Map Spatial Database is building on the base of the newest Standard for Digital Geologic Map and Spatial Database, the geodatabase model, the classical one of spatial database model at present, which supports object-oriented vector data. In this model, entities are represented as objects class and feature class. This model defines the relationships between features classes, objects classes, or between both of the features classes and objects classes by relationship class. It adopts link, dependence, combination, heritage to describe the relationship rules between objects to create new connection set, in order to strengthen the database ability to service. By researching on the relationships between spatial granularity, description granularity, semantic granularity, storage granularity and division technology, the model realizes the geologic map data model irrelevant to the scale.