The KML generating function in daily RDAHMM portlet is extended to support date ranges, instead of single dates. The resulted KML will have a "Folder" element which contains a series of "Document" elements corresponding to each date within that date range. Each "Document" is marked with a "TimeSpan" element, so that the whole KML can be played as an animation along the time axis.
Corresponding modifications are applied to the daily RDAHMM result service.
Due to problems with current implementation, the KML function can only support a not-too-long date range, typically shorter than two years. We will try different implementation methods to solve this problem.
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