图 书 馆
元数据检索：利用社会元数据进行地图标注的软件原型MetaData Retrieval: A Software Prototype for the Annotation of Maps with Social Metadata |
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| 课程网址: | http://videolectures.net/ecmlpkdd2011_meo_social/ |
| 主讲教师: | Rosa Meo |
| 开课单位: | 都灵大学 |
| 开课时间: | 2011-11-03 |
| 课程语种: | 英语 |
| 中文简介: |  |
| 课程简介: | MetaData Retrieval (MDR) is a software module for the enrichment of geo-referenced maps with metadata. Metadata are annotations on spatial locations that are taken from the Volunteered Graphical Information projects like OpenStreetMap and GeoNames. The MDR user acts with a user-friendly GUI, a Query By Example in which the user specifies in a multi-dimensional data model the spatial objects for which new information are searched for. The request is translated into SQL queries for the database and in web service requests for OpenStreetMap and GeoNames. Downloaded annotations are checked and compared with the history for duplicate elimination. Annotations are presented to the user in the context of an interactive, geo-referenced map and in a hierarchical, ontological structure, that is a facility for indexing and browsing. On demand, an annotation is stored in the system history. Finally, the user can filter the annotations that characterize a specified area by a statistical filter that compares the annotation frequency with the neighborhood. |
| 关 键 词: | 元数据检索; 地图; 地理 |
| 课程来源: | 视频讲座网 |
| 最后编审: | 2019-04-03：lxf |
| 阅读次数: | 104 |