What are the known issues with Web Fire Mapper?
November 2009: Fire density grid does not operate as expected. The Web Fire Mapper (WFM) allows users to view historical fire data by entering custom dates. If the query returns a large number of fire points, WFM displays an aggregate summary of fires by displaying a fire density grid. This grid provides an overview of the density of fires in a given area rather than individual fire locations, thereby avoiding the need to query large number of fires from the server. To display the fire density grid, WFM uses certain pre-calculated summaries where fire points are aggregated into specific spatial and temporal intervals. Having fire data aggregated at fixed intervals means that when a user enters a custom date range it may not match the fixed interval date range of the fires calculated for the grid displayed. As a result, the grid may include summaries of fire points beyond the user-entered date range. This system flaw is currently being addressed and is a priority in the ongoing update o
