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A collection of vector polygon features for large buildings within the Urban Development Boundary (UDB) and outside the UDB, approximately 938 square miles. Large buildings are defined as structures in an apparently commercial, industrial or other non-residential area. Any other structures located in residential areas of large size exceeding eight thousand (8,000) square feet, with the exception of detached single family residences (SFR), were digitized as large buildings, i.e. condos, townhomes, etc. Individual structures such as sheds, small barns, or other small indistinguishable structures that can be identified as part of a large building were not digitized. The planimetric layer for Miami-Dade County was previously updated in 2005 by Woolpert. Aerial Cartographics of America's update is comprised of two individual updates: inside the UDB (542 square miles) performed using a combination of on-screen/2D digitizing and 3D/stereo compilation technique of the 2013 orthophotography captured by Aerial Cartographics of America; and outside of the UDB (396 square miles) using on-screen/2D digitizing of the 2012 orthophotography captured by PhotoScience. Personnel that collected this data are either photogrammetrists trained in stereo collection or editors trained in ortho-photography based collection. Stereo 3D collection was used to make sure the tops of very tall building were in the correct location. Items included in the feature class: New buildings, updated buildings, and buildings that no longer exist were deleted.Definition of particular fields in the Large Buildings feature class: Source=P, where P=Planimetric, Year_UPD = Year when the feature was last updated. Revision; Date: March, 2014 By: M. AvilaReason: Add LargeBuilding2013 planimetric layer to production. |