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SIG (spatial information grid) is a spatial information infrastructure which has the ability of demand serving, also it is a mass spatial information resource which could collect and share geographic distribution data. However, currently, many problems are exited in the spatial information resource locating method of SIG, they are especially the excessive net bandwidths it takes, overlong resource...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.