Code |
Definition |
0 |
NoData: Background Value |
1 |
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
meters |
3 |
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 meters |
4 |
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 meters |
5 |
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 meters |
7 |
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 meters |
8 |
Impervious Surfaces: Human-constructed surfaces through which water cannot
penetrate, and that are below approximately 2 meters in height. MMU = 9 square
meters |
9 |
Impervious Roads: Impervious surfaces that are used and maintained for
transportation. MMU = 9 square meters |
10 |
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 meters |
11 |
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 meters |
12 |
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. |