搜索结果: 91-105 共查到“知识库 地图学”相关记录117条 . 查询时间(2.25 秒)
HIDDEN MARKOV MODELS APPLIED IN AGRICULTURAL CROPS CLASSIFICATION
Crop Identification Hidden Markov Models Multitemporal Analysis Object-based Image Analysis
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2015/11/16
This work proposes a Hidden Markov Model (HMM) based technique to classify agricultural crops, exploring information of
temporal image sequences from TM and ETM+
/Landsat sensors. It endeavours to ...
FROM PIXELS TO GRIXELS: A UNIFIED FUNCTIONAL MODEL FOR GEOGRAPHIC OBJECT-BASED IMAGE ANALYS
GEOBIA Remote Sensing Image Analysis Knowledge Ontology
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2015/11/16
Geographic Object-Based Image Analysis (GEOBIA) aims to better exploit earth remotely sensed imagery by focusing on building
image-objects resembling the real-world objects instead of using raw pixel...
Segmentation: The Achilles’ heel of object–based image analysis?
digital cartography spatial framework segmentation land cover
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2015/11/16
Much of the background material on geo-object-based image analysis (GEOBIA) begins with a description of image segmentation
and suggest it as the first stage of the process. Although this approach m...
ESTIMATING CANOPY COVER FROM EUCALYPT DOMINANT TROPICAL SAVANNA USING THE EXTRACTION OF TREE CROWNS FROM VERY HIGH RESOLUTION IMAGERY.
canopy cover object-based image segmentation tree crowns northern Australia tropical savanna
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2015/11/16
Very high spatial resolution satellite imagery provides data that enables spatially detailed analysis of landscapes. The identification
and extraction of information about tree crowns is one such us...
OBJECT-ORIENTED HIERARCHICAL IMAGE VECTORIZATION
Segmentation scale image vectorization Delaunay triangulation
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2015/11/16
We present proximity graphs based approach to hierarchical image segmentation and vectorization. Our method produces an
irregular pyramid that contains a stack of vectorized images of successively r...
QUANTITATIVE COMPARISON OF SEGMENTATION RESULTS FROM IKONOS IMAGES SHARPENED BY DIFFERENT FUSION AND INTERPOLATION TECHNIQUES
Image Sharpening Segmentation IKONO
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2015/11/16
The image sharpening and segmentation procedures have great importance on the classification success. For this reason this work
proposes to evaluate segmentation results obtained from IKONOS images ...
南海海域地理底图(电子版)编绘
地理信息系统 南海底图
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2008/10/14
以1996年国家海洋局、国家测绘局编制的1:50万“南海地形图”作为地形底图(共27幅分幅图),所使用的基础平台是武汉中地公司开发的MAPGIS6.1地理信息系统,通过底图扫描、底图矢量化、底图校正、底图拼接、底图整饰等操作,建立南海海域1:50万地理底图数据库。
Object-based Vegetation Type Mapping from an Orthorectified Multispectral IKONOS Image using Ancillary Information
Vegetation Types Multispectral IKONOS Image Segmentation Quality
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2015/11/16
Traditional pixel-based image classification approaches have some limitations with the use of very high spatial resolution imagery.
In recent years, object-based image analysis (OBIA) approaches has...
OBJECT BASED CLASSIFICATION TECHNIQUES IN URBAN CHANGE PLANNING
Change Detection Digital Map Object Based Analysis Segmentation
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2015/11/16
Rapid growing of population, a reliable solution is essential to monitor the changes and make the digital map revised.
The need of fast decision making and complete control on problems is one of the...
从天下观到世界观的第一步——读《利玛窦世界地图研究》
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2008/1/7
中国古代历来只有天下的观念,而没有世界的意识。所谓天下观是指视中国为天下,为海内,为六合,而视天下以外是四夷,四海之外是诸夷,六合之外则圣人存而不论。换句话说,当时中国看不到有一个世界,不知道中国只是这个世界中的一分子而已。在中原王朝兴盛强大的时候,在世界地理知识不发达,世界各民族之间接触不频繁的时候,这一天下观足够满足于中国人的需要。尽管汉代的时候,中国人已经远航到印度东南海岸与斯里兰卡,唐代更...
北京市电子地图集的设计与技术实现
北京市 电子地图 技术
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2007/12/7
在电子地图设计的研究中,“用户界面设计”、“三维景观表达”、“多媒体的使用”、“动态注记”、“图形冲突”和“屏幕地图的交互功能”等都是至关重要的问题。然而在电子地图日益普及的今天,对这些问题的认识还需进一步的研究。本文结合《北京市电子地图集》的创作实践,详细讨论了电子图集的功能设计和界面设计,对以上问题提出了切实可行的的解决方案,并给出了较为理想的试验结果。
一本简明的高校教学用书——介绍孙达、蒲英霞编著的《地图投影》
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2007/8/24
摘要:代表地球形状的地球椭球面(或球面)是不可展曲面,而地图通常是表示在平面上,在解决地球曲面与地图平面的矛盾中产生的一门学科——地图投影,是用数学方法将地球曲面上的经纬线描写到平面或可展曲面上建立对应的经纬网以确定地面物体的地理位置。地图投影既是一门独立的学科,同时又是地图制图学的重要组成部分,所以它从地图的生产到使用都是不可缺少的数学基础和地图要素。
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基于多源地图信息重组的土壤侵蚀背景值图编制
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2007/8/24
对土地利用图进行信息的挖掘,结合岛状地的界定,提取了其中的岛状地信息;与天然性程度的信息源进行融合,得到了天然岛状地信息;再与土壤侵蚀图、地貌图信息重组,最终得到了土壤侵蚀背景值信息,生成土壤侵蚀背景值图。通过在内蒙古农牧交错带内的试验研究,说明基于土地利用图、土壤侵蚀图和地貌图的多源地图信息重组,编制土壤侵蚀背景值图的方法是可行的。 全文查阅(PDF)
Adaptive concepts for a mobile cartography
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2007/8/24
GISs are moving away from a system for experts to a more widely-used tool for answering spatial-related questions. The dawn of new technologies on the horizon, such as telecommunication, ...