关键词: 历史回溯, ArcSDE, 版本管理, 卫星监测

Abstract:

Satellite monitoring is a mean of verifying the suspicious activities by interpreting the state and analyzing the targets in satellite imagery combining other information,management of targets of satellite monitoring usually has three characteristics, the process of monitoring targets takes a long time, is a repetitious one, and needs multi-users' editing. In practical study the targets are usually stored in a relational database in the form of spatial features, and a "lock→change→release" strategy is usually applied to relational database. However this approach is not suitable for concurrent accessing database. To resolve the problem, so as to restore and manage much status of monitoring targets in the lifecycle of remote sense interpretation, and to support the mission of satellite monitoring. firstly, a discussion was made out about the mechanism of ArcSDE version, and feasibility was researched on that the version was applied to managing satellite monitoring targets, by the version technology the users were allowed to edit targets without locking features, and the other user's edited work was not affected. Therefore, Version technology can resolve the problem caused by multi-user concurrent operation and long transaction processing; Secondly, the feature and mask of satellite monitoring targets was deeply analyzed, it was concluded that the management of targets of satellite monitoring was closely relate to the version management technology. and then the framework of target managing system of Satellite monitoring based on ArcSDE version is designed basing the aforementioned study, the system includes the main functions of version contrasting, historical version tracing, and conflict-resolving strategy among versions; using the system the result of targets interpretation and reappearance of historical status of targets could be accessed and viewed. At last the system is built by the ArcGIS Engine component. The result of system indicated that this system showed good performance in viewing various status of targets and contrasting the same target among various results of interpreting targets, as well as recalling of the historical status, by which the targets managing task of satellite monitoring can efficiently accomplished. and which can be well applied in the field of city planning, management etc.

Key words: satellite monitoring, ArcSDE, historical tracing, version management