The North Carolina Department of Environment and Natural Resources, Division of Parks and Recreation, Natural Heritage Program in cooperation with the NC Center for Geographic Information & Analysis, developed the Significant Natural Heritage Areas digital data to determine the areas containing ecologically significant natural communities or rare species. NOTE: Due to its dynamic nature, this data becomes outdated very quickly.
This data was created to assist governmental agencies and others in making resource management decisions through use of a Geographic Information System (GIS).
An extensive tabular database is maintained by the Natural Heritage Program. Other data that can be accessed include natural area identification code. Supplemental materials are also available that indicate the state, national and global status of the rare plants and animals of North Carolina. These publications are available from the NHP and are helpful in understanding each natural heritage site record. (See Cross References) NATURAL HERITAGE PROGRAM DATA The Natural Heritage Program is the state's most comprehensive source of information on rare and endangered animals and plants, and exemplary natural communities, known collectively as "elements of natural diversity." Since 1976, the program has systematically gathered information on the occurrence and the status of the state's ecological resources. The inventory consists of information compiled from a broad range of sources including herbarium and museum collections, published and unpublished literature, and field surveys by volunteers, contracted workers, and staff. Information from and interpretation of this database for specific sites is available from the Natural Heritage Program. This is generally the preferred method of getting information on elements of natural diversity. The geographic content of the Natural Heritage Program element occurrence database has also been incorporated into the NC OneMap database where it can be combined with other geographic data for planning and analysis. Users of the data must, however, be aware of the nature and limitations of the data. LIMITATIONS OF POLYGON DATA The polygon locations contained in the data represent the approximate boundaries of ecologically significant natural areas. The natural areas database contains data from a variety of sources, which vary in the quality of their locational information. Because of uncertainty about the precision and accuracy of source data, polygons anywhere within several miles of a site of interest should be regarded as indicating the need for more information. Probability of effects by a project depends on the actual location and extent of the natural area, on the nature of the species or community it contains, and on the nature of the action being considered. Interpretation of potential effects should be done only by ecologists familiar with the natural area, with the best locational information available. LIMITATIONS OF ABSENCE OF DATA Although the Natural Heritage Program has conducted numerous biological inventories and has assembled as much of the secondary source data as possible, the large majority of the state has never been systematically surveyed for significant natural areas. In addition, negative surveys are seldom reported to the Natural Heritage Program and are not recorded. The database reflects only locations where a significant natural area was once known to occur. It does not distinguish between areas known to have no elements and those that have not been checked. The absence of natural areas cannot be taken as an indication of absence of elements or of ecological concerns. Natural Heritage Program biologists are often able to give indications of the potential for concern in unsurveyed areas, and the NC OneMap database is not a substitute for this kind of interpretation. DATA CURRENCY The Natural Heritage Program databases are continually updated as new information is acquired. The NC OneMap dataset is updated as needed for applications. Users should determine the date of the last update and, if necessary, see that an update is done prior to their application being run. All printed maps from the GIS should be dated. Depending on activity in a given area, a map may quickly become outdated, or may remain current for several years. It is not possible to set a specific expiration date on maps; however, data more than six months old should not be depended on without checking with the Natural Heritage Program. Only a small portion of the natural areas are monitored on a regular basis. Information in the Natural Heritage Program database represents the occurrence at the last time it was observed. The date of last observation is given in the Natural Heritage Program database but is not included in the NC OneMap database. ADDITIONAL INFORMATION Additional information about significant natural heritage areas, and user services are available from the Natural Heritage Program. The basic data are "public records" and are available for inspection on request for reasonable purposes. Revisions and updates to this layer include:
publication date
These data are intended for research or planning projects that will contribute to better protection for the ecological features involved. Due to its dynamic nature, this data becomes outdated very quickly. The Natural Heritage Program must be contacted before each use of the data set to ensure data currency. The Natural Heritage Program MUST be contacted in writing prior to distribution or hardcopy output of this data layer. Acknowledgement of products derived form this dataset should cite the following: The source of the Significant Natural Heritage Areas data is NC OneMap. Earlier versions of this data set may exist. The user must be sure to use the appropriate dataset for the time period of interest. While efforts have been made to ensure that these data are accurate and reliable within the state of the art, CGIA cannot assume liability for any damages or misrepresentation caused by any inaccuracies in the data or as a result of changes to the data caused by system transfers.
512 N. Salisbury Street, PO Box 27687
Preferred contact is by telephone
NC Dept. of Environment and Natural Resources; Division of Parks and Recreation; Natural Heritage Program NC Dept. of Environment and Natural Resources; Center for Geographic Information and Analysis
NC DENR-Div. of Parks and Recreation, Natural Heritage Program provides the Significant Natural Heritage Areas as ARC/INFO export files to NCCGIA. They are imported as ARC/INFO coverages. The data is reviewed by NHP staff.
Using ESRI's ARC/INFO GIS software, the data set was built for arc and polygon topology using the "build" command. The data set was then cleaned with a fuzzy tolerance of 1 foot. Topology has not been edited since the last build or clean.
These data represent areas containing ecologically significant natural communities or rare species as identified by NC DENR- Div. of Parks and Recreation, Natural Heritage Program.
Natural areas were delineated on 7.5 Minute USGS paper topographic maps which meet National Map Accuracy Standards, using a best estimate with reference to surrounding features.
Locations of ecologically significant natural communities or rare species
Paper maps used to plot locations of the Significant Natural Heritage Areas
Natural Area boundaries were delineated by NHP field biologists. Precision varies. The cartographic method used for the majority of the sites was for the biologist to survey not just the area where the rare species occurred, but the high quality habitat the species may inhabit as well. This area was delineated onto a photocopy of a USGS 1:24,000 topographic map. The delineated map was then brought back to the NHP offices where it was then transferred onto an original USGS paper base map. This map was then digitized by NHP.
512 N. Salisbury Street
PO Box 27687
Phone or mail
CGIA received an Arc/Info shapefile from NHP. The shapefile was then converted to an ESRI feature class.
301 N. Wilmington Street, Suite 700
20322 Mail Service Center
Phone and electronic mail preferred
Metadata imported.
Unique Identifier (A number uniquely identifying the area.)
Natural Heritage Program
Distinguishes high quality from lesser quality sections of site.
Natural Heritage Program
Section is of high quality
NC DENR-Div of Parks and Recreation, Natural Heritage Program
Section is of lesser quality than PRIMARY
NC DENR-Div of Parks and Recreation, Natural Heritage Program
Entire site is either of uniformly high quality or primary/secondary boundaries have not been differentiated
NC DENR-Div of Parks and Recreation, Natural Heritage Program
Acreage of polygon.
Software computed.
Site name.
Natural Heritage Program
Significance of the site.
Natural Heritage Program
Areas that are of national significance
NC DENR-Div of Parks and Recreation Natural Heritage Program
Areas that are of state significance
NC DENR-Div of Parks and Recreation Natural Heritage Program
Areas that are of regional significance
NC DENR-Div of Parks and Recreation Natural Heritage Program
Areas that are of local significance
NC DENR-Div of Parks and Recreation Natural Heritage Program
Areas classified by the Natural Heritage Program as containing ecologically significant natural communities or rare species.
All items are defined by the Natural Heritage Program and they should be contacted with detailed questions.
301 N. Wilmington Street, Suite 700
20322 Mail Service Center
Phone and electronic mail preferred
NCCGIA is charged with the development and maintenance of NC OneMap and, in cooperation with other mapping organizations, is committed to offering its users accurate, useful, and current information. Although every effort has been made to ensure the accuracy of information, errors and conditions originating from physical sources used to develop this dataset may be reflected in the data supplied. The user must be aware of possible conditions and bear responsibility for the appropriate use of the information with respect to possible errors, original map scale, collection methodology, currency of data, and other conditions specific to certain data. NCCGIA does not support secondary distribution of this dataset without its current, compliant metadata record. The use of trade names or commercial products does not constitute their endorsement by NCCGIA or North Carolina State Government.
Data can be customized on a cost-recovery basis. Contact dataq@ncmail.net or 919-733-2090 for more information.
301 N. Wilmington Street, Suite 700
20322 Mail Service Center
Phone and electronic mail preferred