Positional uncertainty of manual digitization vertex based on simulation test
文献类型：会议论文
| 作者 | Wu, Huisheng ; Liu, Zhaoli ; Lin, Lifang |
| 出版日期 | 2009 |
| 会议名称 | Geoinformatics 2008 and Joint Conference on GIS and Built Environment - Advanced Spatial Data Models and Analyses |
| 会议日期 | JUN 28-29, 2008 |
| 会议地点 | Guangzhou, PEOPLES R CHINA |
| 关键词 | Vertex Manual Digitization Turning Angle Positional Uncertainty Distribution Law |
| 英文摘要 | The theoretical models of positional uncertainty of vertexes have been derived from overlay of the error ellipse models that are considered as the positional uncertainty models of line endpoints. Using probability theory and simulation tests, we mainly study the positional uncertainty characteristics of manual digitization vertex. The research results are as follows: first, using the method, that is sequentially digitizing a series of vertexes with different turning angles, repeating about six hundred times, we can get the stable distribution of frequency of digitizing points; second, in the direction of the angular bisector of turning angle, with the value of turning angle increased, the digitizing points from digitizing vertexes have a trend for gather, and the frequency distribution whose peak is less than three shows skewness, while in the direction of the perpendicular angular bisector of turning angle, digitizing points of vertexes with the acute turning angles are more concentrated than the ones with obtuse angles, and the distribution performs a state of symmetric but not the standard normal distribution; third, two dimensional uncertainty model of digitizing vertexes whose plane projection is a type of irregular geometric shape is a joint distribution model combined by skew distribution and approximate normal distribution. |
| 会议主办者 | Sun Yatsen Univ, Univ Cincinnati, Int Assoc Chinese Profess Geog Informat Sci, Guangzhou Inst Geography, S China Normal Univ, Guangdong Inst Eco Environm Soil Sci, Guangdong Assoc Remote Sensing & Geog Informat Systems, Natl Natural Sci Fdn China |
| 会议录 | GEOINFORMATICS 2008 AND JOINT CONFERENCE ON GIS AND BUILT ENVIRONMENT: ADVANCED SPATIAL DATA MODELS AND ANALYSES, PARTS 1 AND 2
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| 会议录出版者 | SPIE-INT SOC OPTICAL ENGINEERING |
| 会议录出版地 | BELLINGHAM |
| 语种 | 英语 |
| 源URL | [http://159.226.123.10/handle/322005/4711]  |
| 专题 | 东北地理与农业生态研究所_合作研究组 |
| 推荐引用方式 GB/T 7714 | Wu, Huisheng,Liu, Zhaoli,Lin, Lifang. Positional uncertainty of manual digitization vertex based on simulation test[C]. 见:Geoinformatics 2008 and Joint Conference on GIS and Built Environment - Advanced Spatial Data Models and Analyses. Guangzhou, PEOPLES R CHINA. JUN 28-29, 2008. |
入库方式： OAI收割
来源：东北地理与农业生态研究所
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