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This data shows the regional boundary, which indicates the jurisdiction between York Region and neighboring regions: City of Toronto, Durham Region, Peel Region, and Simcoe County. The municipal boundaries define the limits of the Region's nine area municipalities: Aurora, East Gwillimbury, Georgina, King, Markham, Newmarket, Richmond Hill, Whitchurch-Stouffville, and Vaughan. Additionally, the data includes the boundary of the Chippewas of Georgina Island First Nation.<\/SPAN><\/P>

The data is reviewed annually, including a bylaw review and topology verification, and updated as needed. In 2007, an extensive investigation and cleanup of the municipal boundary locations was completed, which included snapping the boundaries to the road centrelines (which were spatially adjusted to the orthophotography in 2005); recalculating the boundary along Highway 404 to follow 150 feet west of the centerline of the highway, as outlined in the 1970 Regional Municipality of York Act; spatially adjusting the boundary along the Holland River to coincide with the center of the river as illustrated in the 2005 orthophotography; spatially adjusting the boundary along Lake Simcoe according to recent corrections completed by the Lake Simcoe Regional Conservation Authority, based on the 2002 orthophotography; and clarifying several areas often questioned by users of the municipal boundary data in cooperation with the local municipalities. <\/SPAN><\/P>

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