摘要
随着地理信息的应用不断深入,人们对地理信息的需求也在不断变化,不可避免产生不同来源、格式、比例尺、多投影方式或大地坐标系统的地理空间数据。从空间实体或现象本身不确定性、人类认知表达能力的局限性、空间实体或现象观测的误差、计算机表达地理对象的局限性和空间数据操作产生的误差等方面详细分析了多源地理空间数据产生的客观和主观原因,这对GIS部门之间的数据共享和数据集成来说,具有重要应用价值。
With the development of application of Geographical Information Systems, people need more GIS Information. h inevitably produces Geo - spatial data of different origin, format, scale, geodetic system and multi - projection mode data. This paper analyzes sub- jective and objective reason for producing multi -geospatial data from five aspects： uncertainty of geographic entity and phenomenon, limitations of people＇s cognition and expression, observation error of geographic entity, limitations for computer expressing geographic entity, data manipulate error. It has important application value for data share and ifitegration for GIS department.
出处
《测绘与空间地理信息》
2009年第1期15-18,共4页
Geomatics & Spatial Information Technology
关键词
多源地理空间数据成因
不确定性
认知表达
观测误差
计算机表达
空间数据操作
the reason for multi - geospatial data
uncertainty
cognition and expression
observation error
computer expressing
data manipulate
