Graph overlay method is used in route alignment noise impact assessment to provide a basis for route alignment optimal selection.
采用基于地理信息系统的图形叠置法对线路比选方案的噪声影响情况进行评价。
With the GIS Based graph overlay method, the environment sensitivity around roads and environment impact of roads are analyzed comprehensively.
在图形叠置法用于综合评价公路环境影响的基础上，使用基于ＧＩＳ的图形叠置方法，综合分析公路周围的环境的敏感程度和公路对环境的影响程度，引入影响程度系数，充分利用ＧＩＳ空间分析功能和处理属性数据的功能，进行公路环境影响综合评价和路线方案的优选。
In view of the current situation of environmental impact post-assessment for town s municipal establishment investing projects of our country,the graphic overlay method based on GIS is put forward,and Mapinfo is selected to be the development platform.
针对目前我国城镇市政设施投资项目环境影响后评价的现状,提出了基于GIS的图形叠置法,并选用Mapinfo作为开发平台,对城镇市政设施投资项目进行环境影响后评价。