深度学习和遥感影像支持的矢量图斑地类解译真实性检查方法

空间数据质量检查是数据准确可靠的重要保障,是数据的生命线。然而,目前的空间数据质量检查主要针对拓扑关系、属性一致性以及数据间的相关性进行检查,往往忽视矢量图斑地类解译真实性问题。因此,本文提出深度学习和高分遥感影像支持的矢量图斑地类解译真实性检查方法,选用深度学习经典模型Inception_v3进行迁移学习,对分割后的影像进行自动场景分类,以高分遥感影像块的场景分类结果作为参照依据,对场景分类结果与矢量图斑原始数据进行叠加分析,自动查找出类别信息不符的分割单元,从而提取出可疑图斑,实现矢量图斑地类解译真实性自动检查,并在徐州市贾汪区青山泉镇和大吴镇的矢量图斑地类解译真实性检查中进行验证。实验结果表明,本文方法在研究区图斑地类解译真实性检查中的精确率和召回率分别高达0.925和0.817,可为矢量图斑地类解译真实性检查提供可靠的技术支撑。     

洪涝灾害的本底数据库构建方法

采用一种新的方法和作业流程 ,通过利用 Par GIP并行遥感图像处理软件 ,以及 Arc GIS等软件对洪涝灾害地区建立遥感动态监测的本底数据库 ,包括遥感影像数据及矢量数据 ,为快速进行灾害的监测与评价提供基础与条件 ;通过在鄱阳湖地区的试验 ,使洪灾的监测评价速度和效率成倍提高。     

MapGIS图斑自动编号技术在惠民县历史遗留损毁土地调查中的应用

随着经济的发展,惠民县经济建设对土地的需求和保护耕地的严峻形式之间的矛盾越来越明显,通过进行历史遗留损毁土地的摸底调查,制定有效的土地复垦政策,可在一定程序上缓解供需矛盾,实现经济社会的可持续发展。该文探讨MapGIS图斑自动编号技术,该技术的实现可以为损毁土地的外业调查工作提供方便,全面提高工作效率。     

土地利用/土地覆被变化CLUE-S模型与应用分析——以扬州市为例

本文以扬州市市辖区为例,利用2001年的ETM影像与2007年的ALOS影像两期遥感数据,采用面向对象的信息提取方法,获取了扬州市2001年与2007年两期土地利用空间分布图.在此基础上,研究了CLUE-S模型的原理及CLUE-S模型的应用;探讨了CLUE-S模型所需数据、驱动因子选取、模拟参数设置、模拟结果获取等,进...     

Land use suitability analysis for town development planning in Nanjing hilly areas: A case study of Tangshan new town,China

Land use suitability analysis plays an important role in sustainable land use and solving environmental problems caused by rapid urban development.A land use suitability mapping approach for town development planning in hilly areas was constructed based on two multi-criteria evaluation methods:Weighted Linear Combination(WLC)and Ordered Weighted Averaging(OWA),to comparatively evaluate and map land use suitability of Tangshan new town in Nanjing,China.Fourteen evaluation factors related to topographic,environmental,socio-economics and historical sites data were used as suitability criteria.The analytic hierarchy process(AHP)method and GIS techniques were integrated into the evaluation models to create the land use suitability map for town development planning.The results of WLC approach showed that 11.4%of the total area is highly suitable while the 48.6%is unsuitable.The results of WLC and OWA approach showed the distribution of degree of land use suitability is almost the same.The areas located at the southern and eastern flat regions are highly suitable for land use,whereas the areas close to the mountain forests,steep slopes,waters,and hot springs,have lower suitability for land use.Sensitivity analysis indicated that the suitability results of the two proposed methods are robust.Indirect validation was achieved by mutual comparison of suitability maps derived from the WLC and OWA methods.It demonstrated that the overall agreement is 90.81%and kappa coefficient is 0.81,indicating that both methods provide very similar spatial suitability distributions.By overlaying the resultant map with the previous master plan map of Tangshan new town,the overlay map once again indicated a satisfactory ecological fit between the two maps.At last,several recommendations are proposed aiming at improving the long-term town development plan for Tangshan new town.     

SYSTEM FOR AUTOMATIC GENERALIZATION OF TOPOGRAPHIC MAPS

1INTRODUCTION Map generalization may be defined as a procedure that generatessmallerscalemapsfromlargerscaleonesusing variousappropriateoperations (e.g.selection,combina- tion, displacement, simplification, etc.) under definite conditions (includingmap scale, purpose, etc.). The au- tomation of the generalization process has been a dream of cartographers for decades. For it is an indispensable wayto construct map databases from large-scale maps to small-scale ones, which can decrease repet…     

湿地景观结构遥感动态变化分析

景观镶嵌结构是景观异质性的重要表现,同时又是各种生态过程在不同尺度上作用的结果。本文以北京市野鸭湖湿地自然保护区为区域背景,以RS、GIS和GPS为技术手段,监测获取了1996-2002年研究区域湿地土地利用／土地覆盖景观空间格局变化,探讨了土地利用/土地覆盖景观空间格局变化对湿地环境的影响。故此,对1998-2000年和2000-2002年湿地资源景观镶嵌结构的动态变化进行详细分析。结果表明:(1)利用遥感信息多尺度、多时相、多波段的特点,在GIS、GPS技术的支持下,能够快速及时准确地反映湿地景观类型的动态变化,为湿地资源监测、保护与利用提供科学依据。(2)借助景观生态学中的相关原理,通过景观空间格局计算模型解释不同类型湿地景观的分布、变化,剖析湿地景观演化机制,为湿地景观规划与评价服务。(3)分析认为,野鸭湖湿地景观格局发生了较大的变化,水域面积减少严重,耕地面积增长幅度不高,旅游用地和堤坝面积明显增加。(4)湖泊和沼泽草甸是控制和影响湿地景观格局的主体。野鸭湖整个湿地景观的破碎化程度降低,人类活动干扰湿地在不断减弱,湿地景观异质性在逐渐降低,斑块之间的连通性提高,生境斑块相互之间的隔离度大大减少,湿地景观趋向稳定。     

STUDY ON METHODS OF LAND USE DYNAMIC MONITORING AT COUNTY LEVEL──Taking Dehui County, Jilin Province for Example

1 INTRODUCTIONMore arable land is needed to meet the continuous increase of population, at the same time, with the rapid development of economy in China, more and more arable land were occupied for the construction of transportation, industry and settlement. Increasing arable land by reclaiming and cultivating unused land and forestland or filling up lakes give rise to environmental deterioration, ecological disturbance and want of natural resources. In order to balance the various kind…     

制图综合与地理信息综合链

本文阐述了传统制图综合、数字地图与GIS对制图综合概念产生的影响,并对国内外主要制图综合概念框架进行了综述与简明评价,指出现代综合概念应该从系统的高度全面、完整、充分地去认识。为准确反映现代制图综合的内涵和研究范畴,建议将传统的“制图综合”的术语拓展为“地理信息综合”。在此基础上,作者从地理信息传输系统的角度,分析了制图综合在不同传输阶段的特点,提出了地理信息综合链的概念,并指出完整的地理信息综合链应包括对象综合、数据库综合、制图综合和归纳综合四部分。它们彼此息息相关,互相制约。     

移动环境地图自动综合系统设计与实现

地图自动综合的研究随着地图与地理信息系统科学的发展不断深入,从早期的地图目标几何量测与图形简化至制图综合知识的运用、制图综合方法评价与集成、乃至在线综合与综合服务的出现.本文针对当前移动地理信息服务对地图随时、随地为所有人和所有事提供实时服务的要求,主要探讨了移动环境中地图自动综合的概念、特征与系统架构等相关理论与技术...