Layer: High Resolution Land Cover (ID: 0)

Name: High Resolution Land Cover

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Description: The Maryland land cover classification raster dataset was developed by the Chesapeake Conservancy as part of the Chesapeake Bay Program Partnership's High-Resolution Land Cover Classification project. It has a one-meter pixel resolution and represents 2013-2014 conditions. Remote sensing techniques, including a rule-based object-oriented classification methodology, were used to create a consistent land cover dataset for Maryland. For a complete list of data used to create this land cover, please see this document.Overall accuracy was measured to be 90%.The Land Cover Dataset has 12 classes: 0 NoData: Background Value1 Water: All areas of open water. This includes ponds, rivers, lakes and boats not attached to docks. MMU = 25 square meters. 2 Wetlands: Low vegetation areas located along marine or estuarine regions that are visually confirmed to have the look of saturated ground surrounding the vegetation and that are located along major waterways (i.e. rivers, ocean). MMU = 225 square meters3 Tree Canopy: Deciduous and evergreen woody vegetation of either natural succession or human planting that is over approximately 3-5 meters in height. Stand-alone individuals, discrete clumps, and interlocking individuals are included. MMU = 9 square meters4 Shrub Scrub: Heterogeneous area of both/either deciduous and/or evergreen woody vegetation. Characterized by variation in height of vegetation through patchy coverage of shrubs and young trees interspersed with grasses and other lower vegetation. Discrete clumps and small patches of interlocking individuals are included, as are true shrubs, young trees, and trees or shrubs that are small or stunted because of environmental conditions, when intermingled in a heterogeneous landscape with low vegetation. MMU = 225 square meters5 Low Vegetation: Plant material less than approximately 2 meters in height. Includes lawns, tilled fields, nursery plantings with or without tarp cover and natural ground cover. MMU = 9 square meters 6 Barren: Areas void of vegetation consisting of natural earthen material regardless of how it has been cleared. This includes beaches, mud flats, and bare ground in construction sites. MMU = 25 square meters7 Structures: Human-constructed objects made of impervious materials that are greater than approximately 2 meters in height. Houses, malls, and electrical towers are examples of structures. MMU = 9 square meters8 Impervious Surfaces: Human-constructed surfaces through which water cannot penetrate, and that are below approximately 2 meters in height. MMU = 9 square meters9 Impervious Roads: Impervious surfaces that are used and maintained for transportation. MMU = 9 square meters10 Tree Canopy over Structures: Forest or Tree Cover that overlaps with impervious surfaces rendering the structures partially or completely not visible to plain sight. MMU = 9 square meters11 Tree Canopy over Impervious Surfaces: Forest or Tree Cover that overlaps with impervious surfaces rendering the impervious surface partially or completely not visible to plain sight. MMU = 9 square meters12 Tree Canopy over Roads: Forest or Tree Cover that overlaps with impervious surfaces rendering the roads partially or completely not visible to plain sight. MMU = 9 square metersMinimum Mapping Unit (MMU) in this instance is the minimum size, dimensions or threshold for features to be mapped or classified within a specific class.Native Projection: USA_Contiguous_Albers_Equal_Area_Conic_USGS_version (All analyses should be conducted in native projection to avoid data errors or miscalculations)This dataset is intended for planning only. It should not be used for legal, financial, or cadastral purposes. Any conclusions drawn from this dataset are not the responsibility of the MD iMAP, Chesapeake Conservancy or the Chesapeake Bay Program Partnership. Users should be aware that features represented in this dataset may not accurately reflect real-world conditions. This dataset is freely viewable and downloadable by the public.

Copyright Text: MD iMAP, CC, CBPP

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