Identification_Information: Citation: Citation_Information: Originator: Earth Systems Research Center, University of New Hampshire Publication_Date: 20220101 Title: Landsat and LiDAR-Derived Canopy Height Metrics for White Mountain National Forest - 2011 Geospatial_Data_Presentation_Form: vector digital data Publication_Information: Publication_Place: Durham, New Hampshire Publisher: Earth Systems Research Center, University of New Hampshire Other_Citation_Details: None Online_Linkage: Description: Abstract: This polygon dataset is derived from Landsat reflectance and LiDAR elevation data. The polygon boundaries represent "image objects" that were derived using eCognition image segmentation software. The software groups image pixels into contiguous segments based on spectral reflectance. The attributes for each polygon are then calculated from the LiDAR crown height layer. Attributes include maximum, minimum, and mean elevation above the ground and standard deviation within each polygon. Elevation is in meters. Landsat data were collected in 2014. LiDAR data were collected in 2010 and 2012. Purpose: This dataset combines Landsat reflectance data and LiDAR crown height data in a polygon format. Data represent portions of White Mountain National Forest, in central New Hampshire, USA. Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 20101101 Ending_Date: 20141003 Currentness_Reference: This dataset represents portions of White Mountain National Forest surrounding Mt Moosilauke in central New Hampshire, USA. Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -71.995192 East_Bounding_Coordinate: -71.652712 North_Bounding_Coordinate: 44.161722 South_Bounding_Coordinate: 43.893710 Keywords: Theme: Theme_Keyword_Thesaurus: ISO 19115 Topic Categories Theme_Keyword: elevation Theme_Keyword: environment Theme: Theme_Keyword_Thesaurus: None Theme_Keyword: LiDAR, Landsat, elevation Place: Place_Keyword_Thesaurus: None Place_Keyword: United States, New England, Northeast, New Hampshire, White Mountain National Forest Access_Constraints: None Use_Constraints: Users must assume responsibility to determine the appropriate use of these data. Because of the nature of the source imagery (30m pixels), it is not recommended that the data be used at scales greater than 1:60,000. Data_Set_Credit: These data were developed by NH GRANIT using funding from the New Hampshire Space Grant Consortium. Native_Data_Set_Environment: Esri ArcGIS 10.9.0.32739 Data_Quality_Information: Logical_Consistency_Report: Polygon topology exists. Completeness_Report: Data are complete for the study area. Lineage: Source_Information: Source_Citation: Citation_Information: Originator: U.S. Geological Survey Publication_Date: 20180719 Title: Landsat 8 Operational Land Imager data Geospatial_Data_Presentation_Form: remote-sensing image Other_Citation_Details: Product ID: LC08_L1TP_013029_20141003 Type_of_Source_Media: onLine Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 20141003 Source_Currentness_Reference: ground condition Source_Citation_Abbreviation: OLI Source_Contribution: Landsat 8 Operational Land Imager Dataset (OLI), used as basis for image segmentation Source_Information: Source_Citation: Citation_Information: Originator: Earth Systems Research Center Publication_Date: 2021 Title: LiDAR-Derived Normalized Digital Surface Model - NH Type_of_Source_Media: onLine Source_Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 20110506 Ending_Date: 20180524 Source_Currentness_Reference: ground condition Source_Citation_Abbreviation: nDSM Source_Contribution: LiDAR-Derived Normalized Digital Surface Model represents a 2-meter resolution LiDAR-derived normalized Digital Surface Model (nDSM) or Canopy Height Model (CHM) for New Hampshire. It was derived from a statewide LAS Dataset which comprised 8 separate LiDAR collections that covered the state as of January, 2020. The LAS Dataset was used as input to the ArcGIS "LAS Dataset to Raster" geoprocessing tool which converted the LAS first return values to raster values in the output data set. Subsequent processing subtracted the corresponding "bare earth" surface values to produce estimated feature height. It is recognized that this is a simplistic approach to the challenge of estimating LiDAR-based first return heights. Users should recognize this and keep it in mind when using the data. This dataset comprises elevation values from the following years: 2011 2012 2014 2016 2018 Process_Step: Process_Description: The eCognition software (version 10.1, Trimble, Inc.) was used to generate image objects to depict landscape features based on reflectance values from the Landsat 8 Operational Land Imager (OLI) and LiDAR derived canopy height measures (nDSM). The eCognition multiresolution segmentation algorithm was used with the following settings to create the image objects; Scale paramter: 50, Shape: 0.25, and Compactness: 0.75. Both OLI and nDSM were used as input to the algorithm and carried the same weight values. Processing was constrained to the area defined by the WMNF, 2011 LiDAR collection. The resulting image objects were subsequently exported to a shapefile. Source_Used_Citation_Abbreviation: OLI, nDSM Process_Date: 20211206 Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: Research Systems Research Center Contact_Person: GRANIT Database Manager Contact_Position: GRANIT Database Manager Contact_Address: Address_Type: physical Address: Morse Hall, University of New Hampshire City: Durham State_or_Province: NH Postal_Code: 03824 Country: US Contact_Voice_Telephone: (603) 862-1214 Contact_Facsimile_Telephone: (603) 862-0188 Contact_Electronic_Mail_Address: granit@unh.edu Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Vector Point_and_Vector_Object_Information: SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: GT-polygon composed of chains Point_and_Vector_Object_Count: 27123 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Grid_Coordinate_System: Grid_Coordinate_System_Name: State Plane Coordinate System 1983 State_Plane_Coordinate_System: SPCS_Zone_Identifier: New Hampshire Transverse_Mercator: Scale_Factor_at_Central_Meridian: 0.999967 Longitude_of_Central_Meridian: -71.666667 Latitude_of_Projection_Origin: 42.500000 False_Easting: 984250.000000 False_Northing: 0.000000 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: Coordinate pair Coordinate_Representation: Abscissa_Resolution: 0.000208 Ordinate_Resolution: 0.000208 Planar_Distance_Units: Survey Feet Geodetic_Model: Horizontal_Datum_Name: North American Datum of 1983 Ellipsoid_Name: GRS 80 Semi-major_Axis: 6378137.000000 Denominator_of_Flattening_Ratio: 298.257222101 Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: WMNF2011Objects Entity_Type_Definition: Umbagog image object polygons Entity_Type_Definition_Source: Earth Systems Research Center 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: nDSM_MAX Attribute_Definition: Maximum pixel height above ground within the polygon, measure in meters. Attribute_Definition_Source: Earth Systems Research Center Attribute_Domain_Values: Unrepresentable_Domain: Each value represents a unique elevation. Attribute: Attribute_Label: nDSM_MEAN Attribute_Definition: Mean pixel height above ground within polygon, measured in meters. Attribute_Definition_Source: Earth Systems Research Center Attribute_Domain_Values: Unrepresentable_Domain: Each value represents a unique elevation. Attribute: Attribute_Label: nDSM_MIN Attribute_Definition: Minimum pixel height above ground within the polygon, measured in meters. Attribute_Definition_Source: Earth Systems Research Center Attribute_Domain_Values: Unrepresentable_Domain: Each value represents a unique elevation. Attribute: Attribute_Label: nDSM_SD Attribute_Definition: Standard deviation of pixel heights within the polygon, measured in meters. Attribute_Definition_Source: Earth Systems Research Center Attribute_Domain_Values: Unrepresentable_Domain: Each value represents a unique elevation. Attribute: Attribute_Label: Shape_Leng Attribute_Definition: Feature geometry. Attribute_Definition_Source: Esri Attribute_Domain_Values: Unrepresentable_Domain: Coordinates defining the features. Attribute: Attribute_Label: Shape_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. Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: Research Systems Research Center Contact_Person: GRANIT Database Manager Contact_Position: GRANIT Database Manager Contact_Address: Address_Type: physical Address: Morse Hall, University of New Hampshire City: Durham State_or_Province: NH Postal_Code: 03824 Country: US Contact_Voice_Telephone: (603) 862-1214 Contact_Facsimile_Telephone: (603) 862-0188 Contact_Electronic_Mail_Address: granit@unh.edu Distribution_Liability: Digital data in NH GRANIT represent the efforts of the contributing agencies to record information from the cited source materials. Research Systems Research Center (CSRC), under contract to the NH Office of State Planning (OSP), and in consultation with cooperating agencies, maintains a continuing program to identify and correct errors in these data. OSP, CSRC, and the cooperating agencies make no claim as to the validity or reliability or to any implied uses of these data. Metadata_Reference_Information: Metadata_Date: 20220119 Metadata_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: Research Systems Research Center Contact_Person: GRANIT Database Manager Contact_Position: GRANIT Database Manager Contact_Address: Address_Type: physical Address: Morse Hall, University of New Hampshire City: Durham State_or_Province: NH Postal_Code: 03824 Country: US Contact_Voice_Telephone: (603) 862-1214 Contact_Facsimile_Telephone: (603) 862-0188 Contact_Electronic_Mail_Address: granit@unh.edu Metadata_Standard_Name: FGDC Content Standard for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Time_Convention: local time