共查询到20条相似文献，搜索用时 93 毫秒
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森林立地类型遥感制图以森林生态学和生物地理学理论为基础,以森林立地学为依据,通过遥感影像特征解译及生物地理学规律综合分析和分类而后制作成森林立地类型图。森林立地条件的遥感技术应用有两方面:现有林地的立地条件调查和宜林地的立地条件调查。一般来说,现有林地的立地类型对宜林地起一定的“规范”作用,但这种“规范”并非一一对应,如应该植树造林的土地不合 相似文献
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本文在介绍Ｉｎｔｅｒｇｒａｐｈ公司的ＧＩＳ软件开发思想的基础上,对ＭＧＥ的运行环境、主要功能与特点作了简要的描述,给出了ＭＧＥ的应用模块结构,并对各应用模块的主要功能和使用方法进行了分析讨论。全面地介绍了ＭＧＥ软件的系统框架,在期反映出ＧＩＳ软件应具备的一般功能结构。 相似文献
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作者曾经利用扫描矢量化软件Ｉ／ＲＡＳＢ和Ｉ／ＧＥＯＶＥＣ在ＧＩＳ和数字地图中进行了各种各样的应用研究。本文着重介绍Ｉ／ＲＡＳＢ和Ｉ／ＧＥＯＶＥＣ等在ＧＩＳ和地图数字化中的应用方法，包括矢量文件和光栅文件。 相似文献
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ＧＩＳ是一种特定而又十分重要的空间信息系统,空间分析是ＧＩＳ多种功能中最具代表性的一种,也是最能体现ＧＩＳ特点的主要部分。本文从数据组织、实现方法、辅助分析决策等几个方面讨论了空间分析功能在森林防火ＧＩＳ中应用的一些实验和构想。 相似文献
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地理信息分类体系在GIS语义数据模型设计中的应用 总被引：4，自引：0，他引：4
本文首先分析了地理信息分类学在ＧＩＳ应用中的主要成绩和进展,在简单讨论ＧＩＳ语义数据模型基本概念的基础上分析地理信息分类体系在ＧＩＳ语义数据模型设计中的应用问题,在本文的最后指出了需要继续进行的工作。 相似文献
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地理信息分类体系在GIS语义数据模型设计中的作用 总被引：10，自引：0，他引：10
本文首先分析了地理信息分类学研究在ＧＩＳ应用中的主要成绩和进展,在简单讨论ＧＩＳ语义数据模型基本概念的基础上分析地理信息分类体系在ＧＩＳ语义数据模型设计中的应用问题。在本文的最后指出了需要继续进行的工作。 相似文献
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本文提出了符合地图综合自动化特点的地图综合分类方法，给出了ＧＩＳ环境下的地图综合过程的模型，并与传统方式的地图综合进行了比较，以期对ＧＩＳ中的地图综合有新的认识。 相似文献
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利用遥感技术进行大熊猫栖息环境的调查研究 总被引：2，自引：0，他引：2
本文利用陆地卫星图像和航空像片判读,结合地面采样调查,对既能从遥感图像上提取又是影响大熊猫主食竹类生长的环境因子,建立多元回归的数学模型。根据多元回归求算各个地块的得分值,以评价主食竹类的立地质量等级。得出位于中高海拔东北向缓坡下部兼有针阔混交林覆盖的厚土层地段,是主食竹类的最适生长环境和大熊猫的最佳栖息环境。因此,利用遥感技术进行立地质量分类和编制大熊猫环境质量分布图,将对恢复和改善其栖息环境以及管理保护工作起到积极的作用。 相似文献
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The reliability of habitat maps that have been generated using Geographic Information Systems (GIS) and image processing of remotely sensed data can be overestimated. Habitat suitability and spatially explicit population viability models are often based on these products without explicit knowledge of the effects of these mapping errors on model results. While research has considered errors in population modeling assumptions, there is no standardized method for measuring the effects of inaccuracies resulting from errors in landscape classification. Using landscape‐scale maps of existing vegetation developed for the USDA Forest Service in southern California from Landsat Thematic Mapper satellite data and GIS modeling, we performed a sensitivity analysis to estimate how mapping errors in vegetation type, forest canopy cover, and tree crown size might affect delineation of suitable habitat for the California spotted owl (Strix occidentalis occidentalis). The resulting simulated uncertainty maps showed an increase in the estimated area of suitable habitat types. Further analysis measuring the fragmentation of the additional patches showed that they were too small to be useful as habitat areas. 相似文献
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Manish Kumar Vasim Riyasat Shaikh 《Journal of the Indian Society of Remote Sensing》2013,41(2):417-424
Identification of suitable site for urban development in hilly areas is one of the critical issues of planning. Site suitability analysis has become inevitable for delineating appropriate site for various developmental initiatives, especially in the undulating terrain of the hills. The study illustrates the use of geographic information system (GIS) and multicriteria evaluation (MCE) technique for selection of suitable sites for urban development in Mussoorie municipal area, Dehradun district, Uttarakhand. For this purpose Toposheet and IKONOS satellite data were used to generate various thematic layers using ArcGIS software. Criteria using five parameters, i.e. slope, road proximity, land use/land cover, land values and geological formation were used for site suitability analysis following land evaluation. The generated thematic maps of these criteria were standardized using pairwise comparison matrix known as analytical hierarchy process (AHP). A weight for each criterion was generated by comparing them with each other according to their importance. With the help of these weights and criteria, final site suitability map was prepared. 相似文献
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Steffen Vogt 《地球空间信息科学学报》2001,4(2):40-46
1 ＩｎｔｒｏｄｕｃｔｉｏｎＫｉｎｇＧｅｏｒｇｅＩｓｌａｎｄ (ＳｏｕｔｈＳｈｅｔｌａｎｄＩｓｌａｎｄｓ,Ａｎｔａｒｃｔｉｃａ)ｉｓｏｎｅｏｆｔｈｅｍｏｓｔｄｅｎｓｅｌｙｐｏｐｕｌａｔｅｄａｒ ｅａｓｉｎＡｎｔａｒｃｔｉｃａ .Ｐｅｒｍａｎｅｎｔｓｔａｔｉｏｎｓｏｆｎｉｎｅｄｉｆｆｅｒ ｅｎｔｎａｔｉｏｎｓａｎｄａｎａｉｒｓｔｒｉｐｓｕｉｔａｂｌｅｆｏｒｈｕｇｅａｉｒ ｃｒａｆｔｓａｒｅｌｏｃａｔｅｄｏｎｉｔｓｉｃｅｆｒｅｅａｒｅａｓ.Ｔｈｅｓｅａｒｅａｓｃｏｍｐｒｉｓｅｌｅｓｓｔｈａｎ 5%ｏｆｔｈｅｉｓｌ… 相似文献
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以景观生态学理论为研究基础,以高分辨率遥感影像等为数据源、利用RS和GIS技术,将梅州城市规划区的土地利用类型分为耕地、林地、草地、城镇用地及公路用地、湖泊水面、河流水面、裸地、滩涂等9类,并从景观的基本构成、景观水平的破碎化与多样性、不同景观斑块的空间格局特征等进行了研究分析;并提出对研究区合理规划土地开发利用的建议... 相似文献
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The aim of the study was to (1) examine the classification of forest land using airborne laser scanning (ALS) data, satellite images and sample plots of the Finnish National Forest Inventory (NFI) as training data and to (2) identify best performing metrics for classifying forest land attributes. Six different schemes of forest land classification were studied: land use/land cover (LU/LC) classification using both national classes and FAO (Food and Agricultural Organization of the United Nations) classes, main type, site type, peat land type and drainage status. Special interest was to test different ALS-based surface metrics in classification of forest land attributes. Field data consisted of 828 NFI plots collected in 2008–2012 in southern Finland and remotely sensed data was from summer 2010. Multinomial logistic regression was used as the classification method. Classification of LU/LC classes were highly accurate (kappa-values 0.90 and 0.91) but also the classification of site type, peat land type and drainage status succeeded moderately well (kappa-values 0.51, 0.69 and 0.52). ALS-based surface metrics were found to be the most important predictor variables in classification of LU/LC class, main type and drainage status. In best classification models of forest site types both spectral metrics from satellite data and point cloud metrics from ALS were used. In turn, in the classification of peat land types ALS point cloud metrics played the most important role. Results indicated that the prediction of site type and forest land category could be incorporated into stand level forest management inventory system in Finland. 相似文献
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基于RS、GIS和景观生态学原理与方法,研究深圳市域景观的空间格局特征及其动态变化.采用ERDASIMAGINE遥感数据处理软件对1995年、1999年和2008年的TM遥感影像图进行数据预处理、监督分类以及分类后处理,并通过ArcMap对经过分类后处理的图像进行编辑,得到深圳市历年的景观分类图,应用FRAGSTATS... 相似文献
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A. Tsouchlaraki 《国际地球制图》2013,28(3):205-217
This study aims to investigate the effectiveness of three main textural indices for the automatic evaluation and classification of landscape scenic quality using digital ground photographs. Based on the textural indices that are commonly used in landscape ecology, the richness, diversity and dominance indices were selected to be examined, and the results from the application of these indices to a sample of ground photographs are described in this paper. The application of the textural indices to the sample of photographs takes place in two different ways, using a geographic information system (GIS) that aims to describe the general and partial heterogeneity of the landscape appearing in each photograph. Furthermore, we investigate the effectiveness of the indices selected as to the classification of the landscape's scenic quality, with the results being compared to other results derived from a research programme of the National Technical University of Athens. Comments and suggestions are presented for further investigation. The main conclusion of the investigation is that the texture indices are sensitized in the landscape's scenic quality, a fact that is positive and encourages the pursuit of further research. 相似文献
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M. Munsi G. Areendran A. Ghosh P. K. Joshi 《Journal of the Indian Society of Remote Sensing》2010,38(3):441-452
Deforestation and degradation are important aspects of landscape dynamics and have global significance. Quantification of
landscape pattern using landscape metrics help in characterisation of landscapes and thus overall health of the forest cover.
Himalayan foothills are one of the most important and fragile landscapes. Developmental activities and depdendence on the
forest resources have altered the spatial pattern of these natural landscapes to a great extent. These changes in the landscape
were analysed using satellite data from 1990, 2001 and 2006. The vegetation type maps of Dehradun forest division were prepared
by supervised classification technique in order to study the landscape dynamics. Patch density, edge density, shape index,
cohesion index, interspersion and juxtaposition index, normalised entropy, and relative richness are some important landscape
metrics used in the study for quantifying the characteristics of landscape. The landscape metrics analysis and transformation
analysis show that the forested areas are getting degraded and physical connectedness between the patches have also decreased
making them isolated. The study demonstrates the importance of geospatial tools for monitoring the impact of disturbances
on the forest ecosystem health, which can further help in landscape management. 相似文献
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Kamaleshwar Pratap K. V. Ravindran B. Prabakaran 《Journal of the Indian Society of Remote Sensing》2000,28(4):249-263
In the present study, ground water prospect zones in Dala-Renukoot area, in Sonebhadra district. Uttar Pradesh, India have been delineated, through integration of various thematic maps using ARC/INFO GIS. Thematic maps in respect of geology, geomorphology. slope, drainage, land-use/land cover, lineament and lineament intersection frequency were prepared on 1:50,000 scale using remote sensing and conventional methods. These maps were scanned and registered with reference to a basemap and are input as separate layers using ARC/INFO GIS. Each theme was assigned a weightage depending on its influence on the movement and storage of groundwater and each unit in every theme map is assigned a knowledge based ranking from 1 to 5 depending on its significance to groundwater occurrence. All the themes are overlaid, two at a time and the resultant composite coverage is classified into five groundwater prospect categories. This output map is correlated with the groundwater data collected in the field. 相似文献