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Known Limitations: The areas surveyed each year can be different and therefore year over year comparisons may be difficult; the surveyors do not do ground truthing for all disturbances identified, therefore it is not guaranteed that all of the disturbances are caused by MPB; the surveyors do not necessarily map tree patches less than three "red" trees (killed this year by MPB) and therefore the dataset may not include all MPB killed trees; "grey" (old) attacked trees are not captured; the surveyors attempt to distinguish between "new" faders and "old" faders but the accuracy of this distinction is not guaranteed and therefore the data may reflect several years and several generations of MPB attack. Beetle year is August 15 of current year - August 14 of following year.Contact: for-info@gov.ab.ca", "mapName": "Mountain Pine Beetle Operations", "description": "This goup of layers represents the Mountain Pine Beetle Operations for various years starting in 1998. 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