NPS Vegetation Mapping Program: Vegetation of Fire Island National Seashore

Metadata:


Identification_Information:
Citation:
Citation_Information:
Originator: Conservation Management Institute
Originator: NatureServe
Originator: New York Natural Heritage Program
Publication_Date: April 2002
Title:
NPS Vegetation Mapping Program: Vegetation of Fire Island National Seashore
Edition: 1.0
Geospatial_Data_Presentation_Form: vector digital data
Online_Linkage: http://biology.usgs.gov/npsveg/products/parkname.html
Description:
Abstract:
This dataset is the finished product of the NPS Vegetation Mapping Project at Fire Island National Seashore.  This dataset depicts the association-level vegetation map for the entire length of Fire Island and the William Floyd Estate.  The park islands in the Great South Bay can be found in a separate file included on the disk.  These vegetation polygons were interpreted and delineated from 1:1200-scale true-color aerial photographs taken in April 1997.  They are attributed with NVCS associations as well as height, pattern, and density information.
Purpose:
The purpose of this data is to provide the managers and researchers on Fire Island with an accurate spatially referenced dataset to assist in their efforts.
Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: April 1997
Currentness_Reference:
ground condition as of 1997
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -73.315058
East_Bounding_Coordinate: -72.751087
North_Bounding_Coordinate: 40.785117
South_Bounding_Coordinate: 40.607277
Keywords:
Theme:
Theme_Keyword_Thesaurus: Fire Island
Theme_Keyword: Fire Island
Theme_Keyword: barrier island
Theme_Keyword: NVCS
Theme_Keyword: photointerpretation
Theme_Keyword: GPS
Theme_Keyword: vegetation classification
Theme_Keyword: NPS Vegetation Mapping Project
Theme_Keyword: GIS
Place:
Place_Keyword: Long Island
Place_Keyword: coastal mapping
Place_Keyword: William Floyd Estate
Access_Constraints: There are no access constraints attached to these data.
Use_Constraints:
These data were designed to identify and map vegetation polygons only.  They are not appropriate for other uses such as legal property boundary identification, tax assessment, etc.
Point_of_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Conservation Management Institute
Contact_Person: Scott Klopfer
Contact_Position: GIS & Remote Sensning Division Coordinator
Contact_Address:
Address_Type: mailing and physical address
Address:
203 West Roanoke Street
City: Blacksburg
State_or_Province: Virginia
Postal_Code: 24061
Country: USA
Contact_Voice_Telephone: 540 231 7348
Contact_TDD/TTY_Telephone: none
Contact_Facsimile_Telephone: 540 231 7019
Contact_Electronic_Mail_Address: sklopfer@vt.edu
Hours_of_Service: 8-5 Monday through Friday EST
Contact Instructions:
email preferred
Native_Data_Set_Environment:
Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.2.2.1350
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Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
The accuracy of classification to association was completed with both a traditional and a fuzzy-set assessment.  This assessment only determined accuracy for polygons at or above the MMU.  The overall accuracy of the map was determined to be .58 (Kappa).  The subsequent Level 5,4, and 3 level fuzzy accuracy assessment produced valuesof .64, .77 and .87 respectively.  The Level 4 accuracy assessment value from the fuzzy assessment is provided for each class.

Accuracy assessments were also performed for polygons below the MMU.  These can be found in the final report.
Quantitative_Attribute_Accuracy_Assessment:
Attribute_Accuracy_Value: Maritime Holly Forest
Attribute_Accuracy_Explanation:
Producers:88.9%
Users: 85.7%
This type was very similar to Maritime Deciduous Scrub Forest and was considered the same at Level 4.
Quantitative_Attribute_Accuracy_Assessment:
Attribute_Accuracy_Value: Old Field Red-Cedar Forest
Attribute_Accuracy_Explanation:
Producers:100%	
Users: 100%	

The type was easily identified and limited to two large stands on the Floyd Estate.
Quantitative_Attribute_Accuracy_Assessment:
Attribute_Accuracy_Value: Maritime Post Oak Forest
Attribute_Accuracy_Explanation:
Producers: 0%
Users: 0%
Only one stand was identified as this type.  That stand was classified as Coastal Oak-Heath Forest during accuracy assessment.
Quantitative_Attribute_Accuracy_Assessment:
Attribute_Accuracy_Value: Coastal Oak-Heath Forest
Attribute_Accuracy_Explanation:
Producers: 100%
Users: 88.9%
This type was most often confused with Pitch pine - Oak Forest which differs only in amount of Pinus rigida in the canopy.
Quantitative_Attribute_Accuracy_Assessment:
Attribute_Accuracy_Value: Japanese Black Pine Forest
Attribute_Accuracy_Explanation:
Producers: 75%
Users: 78.6%
This type was most often confused with Pitch Pine Dune Woodland.  The two types were considered the same at Level 4.
Quantitative_Attribute_Accuracy_Assessment:
Attribute_Accuracy_Value: Pitch Pine - Oak Forest
Attribute_Accuracy_Explanation:
Producers: 100%
Users: 85.7%
The photointerpreters felt that some polygons on the Floyd Estate were more appropriately assigned to this class rather than the Coastal Oak-Heath Forest.  This type was very similar to the Coastal Oak -Heath type and was considered to be the same thing at Level 4.  This type may actually be a product of a more oak dominated canopy with dense Smilax spp. beneath.
Quantitative_Attribute_Accuracy_Assessment:
Attribute_Accuracy_Value: Pitch Pine Dune Woodland
Attribute_Accuracy_Explanation:
Prodcuers: 81.3%
Users: 83.3%
This type was often found in small, linear, polygons, which may account for confusion with non-coniferous associations.  Considered the same as Japanese Black Pine Forest for Level 4.
Quantitative_Attribute_Accuracy_Assessment:
Attribute_Accuracy_Value: Northern Dune Shrubland
Attribute_Accuracy_Explanation:
Producers: 57.1%
Users: 76.9%
There is no clear pattern of confusion beyond other shrubs, although some confusion (with herbaceous types) is due to complex polygon interspersion and small polygons.
Quantitative_Attribute_Accuracy_Assessment:
Attribute_Accuracy_Value: Maritime Deciduous Scrub Forest
Attribute_Accuracy_Explanation:
Prodcuers: 68.0%
Users: 64.7%
Nearly all of the confusion with this type occurs with other shrub associations such as Highbush Blueberry Shrub Forest.  This type was considered the same as Maritime Holly Forest at Level 4.
Quantitative_Attribute_Accuracy_Assessment:
Attribute_Accuracy_Value: Maritime Vine Dune
Attribute_Accuracy_Explanation:
Producers: 25.0%
Users: 25.0%
This type is difficult to identify both from photography and in the field.  It is closely associated with Northern Dune Shrubland and is often confused with it.  It is also a rare type on Fire Island.
Quantitative_Attribute_Accuracy_Assessment:
Attribute_Accuracy_Value: Highbush Blueberry Shrub Forest
Attribute_Accuracy_Explanation:
Prodcuers: 50.0%
Users: 20.0%
This type is frequently confused with the other, more common wetland shrub types Maritime Deciduous Scrub Forest and Northern Salt Shrub.
Quantitative_Attribute_Accuracy_Assessment:
Attribute_Accuracy_Value: Northern Salt Shrub
Attribute_Accuracy_Explanation:
Prodcuers: 60.0%
Users: 57.9%
This type is frequently confused with other wetland types such as Highbush Blueberry Shrub Forest.  Phragmites is found frequently within these stands as well.
Quantitative_Attribute_Accuracy_Assessment:
Attribute_Accuracy_Value: Beach Heather Dune
Attribute_Accuracy_Explanation:
Producers: 81.5%
Users: 86.4%
This type exists both as an association and with Northern Beach Grass Dune in mosaic.  Errors are thought to occur in smaller polygons juxtaposed with Northern Beach Grass Dune and Northern Dune Shrubland.
Quantitative_Attribute_Accuracy_Assessment:
Attribute_Accuracy_Value: Northern Interdunal Cranberry Swale
Attribute_Accuracy_Explanation:
Producers: 100%
Users: 40%
No single polygon of this association exists at the 0.25 MMU.  These accuracy estimates are from small polygons.  This type may be over-predicted on the landscape because it is easily confused with small herbaceous wetlands that are also filled with water at the time of photo acquisition.
Quantitative_Attribute_Accuracy_Assessment:
Attribute_Accuracy_Value: Northern Beach Grass Dune
Attribute_Accuracy_Explanation:
Producers: 87.5%
Users: 76.9%
This is the most prevalent association on Fire Island.  It is part of a mosaic with Beach Heather Dune and most observed confusion is likely due to smaller polygons interspersed with that and Northern Dune Shrubland.
Quantitative_Attribute_Accuracy_Assessment:
Attribute_Accuracy_Value: Overwash Dune Grassland
Attribute_Accuracy_Explanation:
Producers: 0%
Users: 0%	
This type was very limited in distribution on Fire Island.  Although several polygons were labeled as this type, none were identified as such in the field.  This type is easily confused with Beach Heather Dune or Northern Beach Grass Dune which further confounds mapping efforts.
Quantitative_Attribute_Accuracy_Assessment:
Attribute_Accuracy_Value: Brackish Interdunal Swale
Attribute_Accuracy_Explanation:
Producers: 66.7%
Users: 50.0%
This wetland type was often delineated with adjacent Reedgrass Marsh.  It is also a rare type on 
Fire Island existing in polygons at or below the 0.25 ha MMU.
Quantitative_Attribute_Accuracy_Assessment:
Attribute_Accuracy_Value: Brackish Meadow
Attribute_Accuracy_Explanation:
Producers: 100%
Users: 20.0%
Although this type occurs all over Fire Island, it is found in narrow bands or small polygons often associated with Reedgrass Marsh.  Only 1 field assessment point was located within this type.
Quantitative_Attribute_Accuracy_Assessment:
Attribute_Accuracy_Value: Reedgrass Marsh
Attribute_Accuracy_Explanation:
Producers: 58.8%
Users: 64.7%
Low accuracy is likely due to small sample size in the accuracy assessment set.  This type was almost exclusively confused with other wetland types.  Variable coverage density of Phragmites in other types may lead to confusion.
Quantitative_Attribute_Accuracy_Assessment:
Attribute_Accuracy_Value: Low Salt Marsh
Attribute_Accuracy_Explanation:
Producers: 97.3%
Users: 100%
This type was most often confused with High Salt Marsh.  Photointerpretation was mostly determined by presence of water in the photographs which is highly variable (tides, season).  This type was considered the same as High Salt Marsh for Level 4.
Quantitative_Attribute_Accuracy_Assessment:
Attribute_Accuracy_Value: High Salt Marsh
Attribute_Accuracy_Explanation:
Producers: 81.3%
Users: 100%
This type is found in close proximity and intermingled with the Low Salt Marsh type.  These two were considered the same for the Level 4 assessment.
Quantitative_Attribute_Accuracy_Assessment:
Attribute_Accuracy_Value: Northern Sandplain Grassland
Attribute_Accuracy_Explanation:
Producers: 0%
Users: 0%
This type was only mapped in a single small polygon and was identified elsewhere during accuracy assessment.  It is a very rare type and likely exists in very few small patches.  Further confounding this type is its similarity to Northern Dune Shrubland.
Quantitative_Attribute_Accuracy_Assessment:
Attribute_Accuracy_Value: Cultivated Pasture
Attribute_Accuracy_Explanation:
Producers: 100%
Users: 100%
This type is easily identified on the Floyd Estate.
Quantitative_Attribute_Accuracy_Assessment:
Attribute_Accuracy_Value: Interdune Beachgrass-Beach Heather Mosaic
Attribute_Accuracy_Explanation:
Producers: 100%
Users: 89.5%This mosaic was considered correct if identified as either Northern Beach Grass Dune or Beach Heather Dune.  There is likely much more of this type on Fire Island, but the sub-0.25 ha polygons make its appearance in the map more rare.
Logical_Consistency_Report:
All linework was cleaned before building topology.  All reulting polygons are attributed with the appropriate information.
Completeness_Report:
The minimum mapping unit for this project is 0.25-ha.  There are, however, several polygons in the map that are smaller than this mapping area.  We decided to include these small polygons for several reasons.  The most important of these is that many of the recognizable vegetation and man-made features on Fire Island are smaller than the 0.25 MMU planned in the contract.  Inclusion of smaller mapping units allowed us to capture these features and improve the utility of the vegetation map.  It also allowed us to avoid conglomerating obviously homogeneous blocks of vegetation into "mosaics" or "complexes" at the 0.25-ha unit level.
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
We collected a total 89 map points on Fire Island and the William Floyd Estate.  Of these, 21 points were removed because the standard deviation of the differentially corrected location was higher than 10 m.  The resulting 68 points were then overlaid onto the vegetation map and georeferenced aerial photography to assess spatial accuracy of the map.  Each point was examined, and the difference (in meters) between the GPS location and map location was measured using the masuring tool in Arc View.  This value was entered into the appropriate field in the database.  If the exact location of the map point could not be determined or discerned from the aerial photograph, the point was eliminated from consideration.  

A total of 21 points were removed because they could not be accurately measured.  This left 47 points for assessing the spatial accuracy of the vegetation map.  The mean error distance was found to be 4.42 m (± 4.94 m).  Errors distances ranged from 0.00 m - 30.0 m.  When the single 30 m error point was removed (assumed to be an outlier), the mean error distance was 3.86 m ((± 3.18 m) with a range of 0.00 m - 14.09 m.
Lineage:
Source_Information:
Source_Citation:
Citation_Information:
Originator: Aerographics, Inc.
Publication_Date: April 1997
Title:
Aerial Photography
Source_Scale_Denominator: true-color aerial photography
Type_of_Source_Media: hard copy stereo pair photographs
Source_Contribution:
This dataset was used for photointerpretation (with steroscopes).
Source_Information:
Source_Scale_Denominator: Georeferenced True Color photography
Type_of_Source_Media: digital image
Source_Contribution:
These are the scanned and georeferenced versions of the true color photography.  These were used to delineate polygon boundaries with on-screen digitizing.
Process_Step:
Process_Description:
This vegetation map was created from aerial photographs.  The photos were scanned at 600 dpi and georeferenced using control points gathered from georeferenced digital orthophoto quads from the USGS.  ONce the digital photos were georeferenced, they were used to delineate map polygons interpreted from the stero-paired aerial photographs.  Once the delineation of polygons was complete, each polygon was attributed with it's appropriate map class (or vegetation association), height class, pattern class, and density value.  The final layer was converted to an ARCINFO coverage and topology was built.
Process_Step:
Process_Description:
Dataset copied.
Source_Used_Citation_Abbreviation:
\\Bison\buffalo\nps\Databases\FIIS\Vegetation\FIIS_vegmap_04\digital_data\Spatial_Data\FIIS_Combined_Veg
Cloud_Cover: 0
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Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Vector
Point_and_Vector_Object_Information:
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: G-polygon
Point_and_Vector_Object_Count: 8269
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: Label point
Point_and_Vector_Object_Count: 7738
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: GT-polygon composed of chains
Point_and_Vector_Object_Count: 7738
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: Point
Point_and_Vector_Object_Count: 4
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Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Planar:
Grid_Coordinate_System:
Grid_Coordinate_System_Name: Universal Transverse Mercator
Universal_Transverse_Mercator:
UTM_Zone_Number: 18
Transverse_Mercator:
Scale_Factor_at_Central_Meridian: 0.999600
Longitude_of_Central_Meridian: -75.000000
Latitude_of_Projection_Origin: 0.000000
False_Easting: 500000.000000
False_Northing: 0.000000
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: coordinate pair
Coordinate_Representation:
Abscissa_Resolution: 0.000000
Ordinate_Resolution: 0.000000
Planar_Distance_Units: meters
Geodetic_Model:
Horizontal_Datum_Name: North American Datum of 1983
Ellipsoid_Name: Geodetic Reference System 80
Semi-major_Axis: 6378137.000000
Denominator_of_Flattening_Ratio: 298.257222
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Entity_and_Attribute_Information:
Detailed_Description:
Entity_Type:
Entity_Type_Label: FIIS_Combined_Veg
Attribute:
Attribute_Label: FID
Attribute_Definition:
Internal feature number.
Attribute_Definition_Source:
ESRI
Attribute_Domain_Values:
Unrepresentable_Domain:
Sequential unique whole numbers that are automatically generated.
Attribute:
Attribute_Label: Shape
Attribute_Definition:
Feature geometry.
Attribute_Definition_Source:
ESRI
Attribute_Domain_Values:
Unrepresentable_Domain:
Coordinates defining the features.
Attribute:
Attribute_Label: AREA
Attribute_Definition:
Area of feature in internal units squared.
Attribute_Definition_Source:
ESRI
Attribute_Domain_Values:
Unrepresentable_Domain:
Positive real numbers that are automatically generated.
Attribute:
Attribute_Label: PERIMETER
Attribute_Definition:
Perimeter of feature in internal units.
Attribute_Definition_Source:
ESRI
Attribute_Domain_Values:
Unrepresentable_Domain:
Positive real numbers that are automatically generated.
Attribute:
Attribute_Label: MAP_CODE
Attribute_Definition:
numeric code corresponding to map class
Attribute_Domain_Values:
Codeset_Domain:
Codeset_Name: Fire Island Vegetation Map Codeset
Codeset_Source: Conservation Management Institute
Attribute_Domain_Values:
Codeset_Domain:
Codeset_Name: Fire Island Vegetation Map Codeset
Codeset_Source: Conservation Management Institute
Attribute_Domain_Values:
Codeset_Domain:
Codeset_Name: National Vegetation Classification Standard
Codeset_Source: Federal Geographic Data Commission
Attribute:
Attribute_Label: FIIS_VEG_
Attribute:
Attribute_Label: FIIS_VEG_I
Attribute:
Attribute_Label: MAP_CODE_D
Attribute:
Attribute_Label: HEIGHT_COD
Attribute:
Attribute_Label: HEIGHT_C_1
Attribute:
Attribute_Label: DENSITY_CO
Attribute:
Attribute_Label: DENSITY__1
Attribute:
Attribute_Label: LANDUSE_CO
Attribute:
Attribute_Label: LANDUSE__1
Attribute:
Attribute_Label: PATTERN_CO
Attribute:
Attribute_Label: PATTERN__1
Attribute:
Attribute_Label: FIIS_ISLVE
Attribute:
Attribute_Label: FIIS_ISL_1
Attribute:
Attribute_Label: MAP_CODE_1
Attribute:
Attribute_Label: HEIGHT_C_2
Attribute:
Attribute_Label: HEIGHT_C_3
Attribute:
Attribute_Label: DENSITY__2
Attribute:
Attribute_Label: DENSITY__3
Attribute:
Attribute_Label: LANDUSE__2
Attribute:
Attribute_Label: LANDUSE__3
Attribute:
Attribute_Label: PATTERN__2
Attribute:
Attribute_Label: PATTERN__3
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Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: United States Geological Survey
Resource_Description: NPS Vegetation Mapping Program: Vegetation Map of Fire Island National Seashore
Distribution_Liability:
The distributor maintains no liability for the use and application of these data beyond it's intended use as a depiction of vegetation.
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Transfer_Size: 7.447
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name: USGS NPS Vegetation Mapping Home Page
Access_Instructions:
http://biology.usgs.gov/npsveg/products/parkname.html
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Metadata_Reference_Information:
Metadata_Date: 20070829
Metadata_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Conservation Management Institute
Contact_Person: Scott Klopfer
Contact_Address:
Address_Type: mailing and physical address
Address:
203 West Roanoke Street
City: Blacksburg
State_or_Province: Virginia
Postal_Code: 24061
Country: USA
Contact_Voice_Telephone: 540 231 7348
Contact_Facsimile_Telephone: 540 231 7019
Contact_Electronic_Mail_Address: sklopfer@vt.edu
Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Time_Convention: local time
Metadata_Extensions:
Online_Linkage: http://www.esri.com/metadata/esriprof80.html
Profile_Name: ESRI Metadata Profile
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