Metadata: Identification_Information: Citation: Citation_Information: Originator: Geological Survey of Alabama Publication_Date: 1997 Title: Partial National Wetland Inventory Coverage for Mobile and Baldwin counties Edition: 1.0 Geospatial_Data_Presentation_Form: map Series_Information: Series_Name: GSA Digital Geospatial Data Series Issue_Identification: Publication_Information: Publication_Place: Tuscaloosa, Alabama Publisher: Geological Survey of Alabama Online_Linkage: none Description: Abstract: NWI digital data files are records of wetlands location and classification as defined by the U.S. Fish & Wildlife Service. This dataset is s compilation of a series available in 7.5 minute by 7.5 minute blocks containing ground planimetric coordinates of wetlands point, line, and area features and wetlands attributes. The hardcopy maps that were used as the source for the digital data were produced distributed by the U.S. Fish & Wildlife Service's National Wetlands Inventory project. Purpose: The data provide consultants, planners, and resource managers with information on wetland location and type. For use in GIS and other applications. The data have been modified by GSA in support of the "Comprehensive GIS Coastal Inventory" as funded by NOAA through ADCNR as part of the Coastal Impact Assistance Program. Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1979 Currentness_Reference: source photography date Status: Progress: Complete Maintenance_and_Update_Frequency: Irregular Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -88.500025 East_Bounding_Coordinate: -87.374984 North_Bounding_Coordinate: 31.375016 South_Bounding_Coordinate: 30.374979 Keywords: Theme: Theme_Keyword_Thesaurus: none Theme_Keyword: wetlands Theme_Keyword: hydrologic Theme_Keyword: land cover Theme_Keyword: surface and manmade features Place: Place_Keyword_Thesaurus: none Place_Keyword: Mobile Place_Keyword: Baldwin Access_Constraints: None Use_Constraints: Reproduction or redistribution of digital data sets or products derived therefrom outside of licensees' organization or entity is expressly forbidden. The only exception is redistribution to consultants working for the licensee, and then only for purposes, related to work for the licensee. Such consultants may not further reproduce or redistribute these data sets. None of these data shall be electronically duplicated on magnetic or optical media for use by others, in whole or in part, without permission of the Geological Survey of Alabama. Any hardcopies utilizing these data sets shall clearly indicate their source. If the licensee has modified the data in any way they are obligated to describe the types of modifications they have performed on the hardcopy map. Licensee specifically agrees not to misrepresent these data sets, nor to imply that changes they made were approved by Geological Survey of Alabama. Federal, State, and local regulatory agencies with jurisdiction over wetlands may define and describe wetlands in a different manner than that used in this inventory. There is no attempt, in either the design or products of this inventory, to define the limits of proprietary jurisdiction of any Federal, State, or local government or to establish the geographical scope of the regulatory programs of government agencies. Persons intending to engage in activities involving modifications within or adjacent to wetland areas should seek the advice of appropriate Federal, State, or local agencies concerning specified agency regulatory programs and proprietary jurisdictions that may affect such activities. Point_of_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Nick Tew Contact_Organization: Geological Survey of Alabama Contact_Position: Manager, GIS Section Contact_Address: Address_Type: mailing address Address: P.O. Box O City: Tuscaloosa State_or_Province: Alabama Postal_Code: 35486-9780 Country: USA Contact_Voice_Telephone: (205) 349-2852 Contact_Facsimile_Telephone: (205) 349-2861 Contact_Electronic_Mail_Address: ntew@sand.gsa.tuscaloosa.al.us Data_Set_Credit: This work done with the funding and cooperation of the U.S. Environmental Protection Agency and the Dauphin Island Sea Lab Marine Environmental Sciences Consortium. Native_Data_Set_Environment: Windows_NT, 4.0, Intel UNIX ARC/INFO version 7.1.1 Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: Accuracy is tested by manual comparison of the source with hard copy printouts and/or symbolized display of the digital wetlands data on an interactive computer graphic system. Logical_Consistency_Report: Polygon and chain-node topology present. Polygons intersecting the neatline are closed along the border. Segments making up the outer and inner boundaries of a polygon tie end-to-end to completely enclose the area. Line segments are a set of sequentially numbered coordinate pairs. No duplicate features exist nor duplicate points in a data string. Intersecting lines are separated into individual line segments at the point of intersection. Point data are represented by two sets of coordinate pairs, each with the same coordinate values. All nodes are represented by a single coordinate pair which indicates the beginning or end of a line segment. The neatline is generated by connecting the four corners of the digital file, as established during initialization of the digital file. All data crossing the neatline are clipped to the neatline and data within a specified tolerance of the neatline are snapped to the neatline. Tests for logical consistency are performed by vendor software. Completeness_Report: All photo-interpretable wetlands are mapped. In the treeless prairies, 1/4 acre wetlands are mapped. In forested areas, small open water and emergent wetlands are mapped. In general, the minimum mapping unit is from 1 to 3 acres depending on the wetland type and the scale and emulsion of the source aerial photography. Where evergreen forested wetlands predominate, wetlands smaller than 3 acres may not be mapped. Thus, a detailed on the ground and historical analysis of a single site may result in a revision of the wetland boundaries established through photographic interpretation. In addition, some small wetlands and those obscured by dense forest cover may not be included in this dataset. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: Horizontal positional accuracy for the digital data is tested by visual comparison of the source with hard copy plots. Lineage: Source_Information: Source_Citation: Citation_Information: Originator: Special Project Publication_Date: 1979 Title: Special Project Photography Geospatial_Data_Presentation_Form: remote-sensing image Source_Scale_Denominator: 65000 Type_of_Source_Media: color infrared aerial photograph film transparency Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1979 Source_Currentness_Reference: photo date Source_Citation_Abbreviation: none Source_Contribution: wetlands spatial and attribute information Source_Information: Source_Citation: Citation_Information: Originator: U.S. Geological Survey Publication_Date: 1982 Title: Geospatial_Data_Presentation_Form: map Series_Information: Series_Name: 7.5-minute series (topographic) Issue_Identification: Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Source_Scale_Denominator: 24000 Type_of_Source_Media: Stable-base material Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1982 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: none Source_Contribution: base cartographic data Source_Information: Source_Citation: Citation_Information: Originator: U.S. Fish & Wildlife Service, National Wetlands Inventory Publication_Date: 1983 Title: Chunchula Geospatial_Data_Presentation_Form: map Series_Information: Series_Name: Issue_Identification: Publication_Information: Publication_Place: St. Petersburg, FL Publisher: U.S. Fish & Wildlife Service, National Wetlands Inventory Source_Scale_Denominator: 24000 Type_of_Source_Media: stable-base material Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1983 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: none Source_Contribution: wetlands location and classification Process_Step: Process_Description: NWI maps are compiled through manual photointerpretation of NHAP or NAPP aerial photography supplemented by Soil Surveys and field checking of wetland photo signatures. Delineated wetland boundaries are manually transferred from interpreted photos to USGS 7.5 minute topographic quadrangle maps and then manually labelled. Quality control steps occur throughout the photointerpretation, map compilation, and map reproduction processes. Process_Date: 1983 Process_Step: Process_Description: Digital wetlands data were manually digitized from stable-base copies of the 1:24,000 scale wetlands overlays registered to the standard U.S.Geological Survey (USGS) 7.5 minute quadrangles into topologically correct data files using Arc/Info software. Files contain ground planimetric coordinates and wetland attributes. The quadrangles were referenced to the North American Datum of 1927 (NAD27) horizontal datum. Manual digitizing used a digitizing table to capture the digital data at a resolution of at least 0.005 inches; attribution was performed as the data were digitized. The data were checked for position by comparing plots of the digital data to the source material. Process_Date: Digitized 1997; Merged 2002 Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Vector Point_and_Vector_Object_Information: SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: Point Point_and_Vector_Object_Count: 549 SDTS_Point_and_Vector_Object_Type: String Point_and_Vector_Object_Count: 1588 SDTS_Point_and_Vector_Object_Type: GT-polygon composed of chains Point_and_Vector_Object_Count: 550 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Geographic: Geographic_Coordinate_Units: Decimal degrees Latitude_resolution: .001 Longitude_resolution: .001 Geodetic_Model: Horizontal_Datum_Name: North American Datum of 1927 Ellipsoid_Name: Clarke 1866 Semi-major_Axis: 6378206.400000 Denominator_of_Flattening_Ratio: 294.978698 Entity_and_Attribute_Information: Overview_Description: Entity_and_Attribute_Overview: Each entity is attributed with a classification based on U.S. Fish & Wildlife's NWI wetlands classification code list. The wetland classification system is hierarchical, with wetlands and deepwater habitats divided among five major systems at the broadest level. The five systems include Marine (open ocean and associated coastline), Estuarine (salt marshes and brackish tidal water), Riverine (rivers, creeks, and streams), Lacustrine (lakes and deep ponds), and Palustrine (shallow ponds, marshes, swamps, sloughs). Systems are further subdivided into subsystems which reflect hydrologic conditions. Below the subsystem is the class which describes the appearance of the wetland in terms of vegetation or substrate. Each class is further subdivided into subclasses; vegetated subclasses are described in terms of life form and substrate subclasses in terms of composition. The classification system also includes modifiers to describe hydrology (water regime), soils, water chemistry (pH, salinity), and special modifiers relating to man's activities (e.g., impounded, partly drained). Entity_and_Attribute_Detail_Citation: Cowardin, L.M., V. Carter, F. Golet, and E. LaRoe. 1979. Classification of wetlands and deepwater habitats of the United States. U.S. Fish Wildlife Service. 103 pp. Entity_and_Attribute_Detail_Citation: Photointerpretation Conventions for the National Wetlands Inventory, March 1990 Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: Geological Survey of Alabama Contact_Position: Nick Tew Contact_Address: Address_Type: mailing address Address: P.O. Box O City: Tuscaloosa State_or_Province: Alabama Postal_Code: 35486-9780 Country: USA Contact_Voice_Telephone: (205) 349-2852 Contact_Facsimile_Telephone: (205) 349-2861 Contact_Electronic_Mail_Address: ntew@sand.gsa.tuscaloosa.al.us Distribution_Liability: Geological Survey of Alabama (GSA) provides these geographic data "as is." GSA makes no guarantee or warranty concerning the accuracy of information contained in the geographic data. GSA further makes no warranties, either expressed or implied as to any other matter whatsoever, including, without limitation, the condition of the product, or its fitness for any particular purpose. The burden for determining fitness for use lies entirely with the user. Although these data have been processed successfully on computers of GSA, no warranty, expressed or implied, is made by GSA regarding the use of these data on any other system, nor does the fact of distribution constitute or imply any such warranty. In no event shall the GSA have any liability whatsoever for payment of any consequential, incidental, indirect, special, or tort damages of any kind, including, but not limited to, any loss of profits arising out of use of or reliance on the geographic data or arising out of the delivery, installation, operation, or support by GSA. Metadata_Reference_Information: Metadata_Date: 1997 Metadata_Review_Date: 1997 Metadata_Future_Review_Date: 1998 Metadata_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: Geological Survey of Alabama Contact_Person: Nick Tew Contact_Position: Manager, GIS Section Contact_Address: Address_Type: mailing address Address: P.O. Box O City: Tuscaloosa State_or_Province: Alabama Postal_Code: 35486-9780 Country: USA Contact_Voice_Telephone: (205) 349-2852 Contact_Facsimile_Telephone: (205) 349-2861 Contact_Electronic_Mail_Address: ntew@sand.gsa.tuscaloosa.al.us Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata Metadata_Standard_Version: Version of June 8, 1994 Metadata_Access_Constraints: none Metadata_Use_Constraints: none