数字地质填图PRB粒度理论框架研究

Theoretical framework of PRB granularity of digital geological mapping

从地质填图中计算机野外数据采集技术研究的现状和近30年研究中存在的问题入手,在确定地质填图空间数据表达和遵循传统地质填图规律的基础上,通过对空间粒度(the spatial granularity)、语义粒度(the semantic granularity)、描述粒度(the descriptional granularity)和存储粒度(the storage granularity)的分割及其相关关系的研究,提出了数字地质填图PRB粒度理论框架:通过对野外路线观测的解释数据(the interpreted data)和绝对数据(the absolute data)的结构方式与关系的研究,设计了可以适合任意比例尺的野外地质填图过程的"语法"结构,确定了描述地质填图过程中被采集的数据项与数据项相互结合的结构方式和关系,定义和论述了地质填图的PRB"粒度"和PRB过程;通过针对地质综合分析与地质连图所需的内容进行结构化描述的基本需求的研究,确定了语义与描述粒度的结构化"粒度",定义和论述了PRB数据模型。

The author analyzed the present state of research on the field digital data collection technique applied in geological mapping and existing problems during the past 30 years and studied the segmentation techniques of the semantic, descriptional, spatial and storage granularity and their relationships with scale-independent mapping. The author proposes the theoretical framework of PRB granularity for digital geological mapping according to these studies and based on establishing the expression of spatial data in geological mapping and complying with the characteristics of traditional mapping. Through studies of the structure mode and relationships of the interpretative data and absolute data of the field traverse observation, the author designs the ＂grammatical＂ structure of the field geological mapping process with scale-independent mapping, determines the structure mode of mutual connection of the collected data item and data ite,n and their relationships in the description of geological mapping and defines and elucidates the PRB ＂granularity＂ and process in digital mapping. Through a study of the content required for an integrated geological an.alysis and geological map linking, the basic requirements for structural description are studied, the structure granularity is determined based on the semantic granularity and descriptional granularity and the PRB data model is defined and discussed.