| 摘要 |
A method includes creating a network model that includes a plurality of objects that represent assets in a real world system at real world times. The network model is displayable by a geographic information system. A first object is entered in the network model. The first object is associated with a first creation date and a first expiration date at first and second real world times, respectively. A second object is entered in the network model. The second object is associated with a second creation data and a second expiration date at third and fourth real world times, respectively. A system clock in the network model is set to a fifth real world time that is between the first and third real world times. Displaying the first object and any additional objects in the network model that represent assets present in the real world system at the fifth real world time. Another method includes creating a network model that includes a plurality of objects that represent assets in a real world system at real world times. The network model is displayable by a geographic information system. Attribute data is entered at a first transaction time for a first object in the network model, and the attribute data is associated with a first real world time. Attribute data is entered at a second transaction time for the first object in the network model, and the attribute data is associated with a second real world time. A system clock in the network model is set to a third real world time that is between the first and second real world times. The first object is selected in the network model, and the attribute data associated with the first real world time is automatically displayed.
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