This local gis include 3 main functions : browsing and modifying the data of sub - compartments and map layers , two directions of query between special and attribute data , the outputting thematic maps and reporting statistics tables . this system supplies landscape structure evaluation and scaling analysis of zst scenic forestry 本设计中的gis实现了小班数据和林班数据的浏览、修改,图层的修改,地理信息的双向查询,专题图输出,报表输出等功能。
On the other hand , many processing on trivial details are finished by computer , which arises the efficiency of the grading work greatly . the system ' s main functions contain graphic data processing , attribute data processing , and the maintenance of grading factors , grading exponent system and grading model 最后,本文参照《农用地分等、定级、估价规程(国土资源部冲和克拉玛依的实际情况,组织并建立了克拉玛依农用地定级因素回了、因素权责。
3 . when database was built , taking land resource unit as geographical unit for watershed data integration , we analyzed in piles land resource unit map and single element map layer of every evaluation factor , acquired attribute data through manipulation on attribution file of produced map layer 流域数据建库时以土地资源单元作为流域数据集成的地理单元,将土地资源单元图与各个评价因子的单要素图层分别进行叠置分析,通过对各生成图层的属性文件进行操作来获取属性数据。
Basing on key concepts and techniques in object - oriented modeling , the thesis discusses design of object - oriented spatiotemporal data model , and entirely defines and describes spatiotemporal object types that are of concern in a stdm . organization of temporal attribute data and temporal treatment of spatial object are described . spatiotemporal object operators and spatiotemporal index are logically designed 论文对模型的时态属性数据组织和空间对象的时态处理进行了描述,提出作为节点和弧段,空间位置和范围是它们的本质属性,所以只要节点和弧段的空间位置和范围发生变化,则节点和弧段发生生亡事件。