An Assessment of Existing and Potential Tree Canopy in Loudoun County, Virginia.,

,Forest tracts is a base map data layer derived by automated processes and processed for cartographic representation at 1:2400 scale. The polygon features represent the areas of forest or scrub cover as seen from above and are mapped to National Map Accuracy Standards (NMAS). Forest is used by both the private and public sectors for comprehensive planning, facility planning, preservation projects, site design and land cover analysis.,Data are stored in the corporate ArcSDE Geodatabase as a polygon feature class. The coordinate system is Virginia State Plane (North), Zone 4501, datum NAD83 HARN, Vertical datum, NAVD88, US Survey foot units. OMAGI updates all base map data via a photogrammetric process, using aerial imagery that is flown yearly in phases. A different portion of the County is updated each year with the base map maintenance services contract, depending upon development patterns and update funding. See "Lineage" section for the list of extents for each Phase area, which are listed as “Data Sources”. The field “UPD_DATE” indicates the date a feature was last re-mapped, although it may have been reviewed for changes more recently.,

The planimetric data was compiled by The Sanborn Map Company, Inc for the Metropolitan District and is based on an aerial flight performed in April 2015. In addition, the City's GIS staff has been updating limited planimetric features based on information on file in various City departments. The planimetric data has also been updated in 2016 and yearly to current based on spring aerial flights by EagleView.

The Vegetation Lines (VL) layer consists of photogrammetrically interpreted polygons representing mass tree stands and brush growth areas in Jefferson County, Kentucky in Spring of 2019. View detailed metadata.

,More Metadata,The Village Conservation Overlay District (VCOD) layer is a zoning overlay district of the Revised 1993 Loudoun County Zoning Ordinance (Zoning Ordinance) and identifies thirteen small villages and hamlets outside of the boundaries of Loudoun County’s incorporated towns and planned residential communities that contain unique, scenic and historic characteristics that should be maintained and protected. The VCOD is a component of the Official Zoning Ordinance adopted by the Board of Supervisors on January 6, 2003, effective on January 7, 2003, and the Zoning Ordinance further amended on December 6, 2006, and is shown on the Official Loudoun County, VA Zoning Map. The VCOD layer is owned and maintained by Loudoun County, Virginia Department of Building and Development.,Purpose:,The VCOD is established to recognize the development patterns existing in traditional villages, considered to be valuable heritage resources, and to encourage the retention and reinforcement of the pattern, character and visual identity of the individual village. The data are used extensively for taxation, subdivision review, permitting, and planning. Although the feature class represents the VCOD, a determination should be requested from the Zoning Administrator to verify whether a particular property is located within the VCOD.,

,Metadata,The Mountainside Development Overlay District is a zoning overlay district administered by the Department of Building and Development. Mountainside classifications are based upon the following criteria: critical elevation, debris flow (slippage) potential, groundwater recharge, soils, slope, and forest values. Critical elevation areas are determined from the County's digital topography, soil and slope values are based upon data, the County's soil layer, and forested areas are based upon the digital forest data. This original MDOD replaces the voided layer implemented in 2003 (see disclaimer above).,Purpose:,The Mountainside Development Overlay District is a zoning overlay district (see Section 4-1600 of the 1993 Loudoun County Zoning Ordinance) and regulates development on the mountainsides of the County. Mountainside data should be used for general planning purposes only and is not intended for use in delineating specific use or suitability of soils for a particular site. Areas prone to debris flow (slippage) may not be accurately delineated. The Department of Building and Development is responsible for final clearance and interpretation on zoning/building permits and land development applications for the Mountainside Development Overlay District.,

,

Listing of both publicly and privately maintained trees in the public right of way, with information on the condition, location, size, species and maintenance responsibility. Data was collected with the intent to predict maintenance needs, as well as to show the level of diversification within the street tree population.,