# Two Foot Topographic Contours - Squannacook River (0107000403) - smoothed

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## Metadata:

- Identification_Information
- Data_Quality_Information
- Spatial_Data_Organization_Information
- Spatial_Reference_Information
- Entity_and_Attribute_Information
- Distribution_Information
- Metadata_Reference_Information

Identification_Information:
  Citation:
    Citation_Information:
      Originator:
        GRANIT, Earth Systems Research Center, University of New Hampshire
      Publication_Date: 20191001
      Title:
        Two Foot Topographic Contours - Squannacook River (0107000403) - smoothed
      Geospatial_Data_Presentation_Form: vector digital data
      Publication_Information:
        Publication_Place: Durham, New Hampshire
        Publisher:
          GRANIT, Earth Systems Research Center, University of New Hampshire
      Other_Citation_Details: None
      Online_Linkage:
        <URL:http://www.granit.unh.edu/cgi-bin/nhsearch?dset=contours_2ft/Contour_2ft_0107000403_smooth>
  Description:
    Abstract:
      This data set represents smoothed, 2-foot bare earth contours (isolines) for the Squannacook River (0107000403) HUC 10 unit. It was derived from a data set which was compiled from LIDAR collections in NH available as of spring, 2019. The raster was filtered using the ArcGIS FOCAL STATISTICS tool with a 3x3 circular neighborhood. The contours were generated using the ArcGIS CONTOUR tool while applying a Z factor of 3.2802 to convert the elevation values from meters to feet. The filtered contours were then smoothed using the ArcGIS SMOOTH LINE tool. The data include an INDEX field with values of 10 and 100 to flag 10 and 100-foot contours. Note on HUC 01060000310: Due to limitations in the source LIDAR data, some anomalies exist in the generated contours in coastal areas of the state. These were left in the data so that users can determine what further processing best meets their application needs.
    Purpose:
      These contours connect points of equal elevation at 2-foot intervals, and are one of a suite of topographic datasets available from NH GRANIT that convey the shape of the Earth's surface.
    Supplemental_Information:
      Two companion data sets representing (1) filtered versions of the contours (Two Foot Topographic Contours - Squannacook River (0107000403) - filtered) and (2) shapefile showing the extents of source LiDAR-derived DEM data (Two Foot Topographic Contours - LiDAR Source) are also available from GRANIT.
  Time_Period_of_Content:
    Time_Period_Information:
      Range_of_Dates/Times:
        Beginning_Date: 20110506
        Ending_Date: 20180524
    Currentness_Reference: None
  Status:
    Progress: Complete
    Maintenance_and_Update_Frequency: None planned
  Spatial_Domain:
    Bounding_Coordinates:
      West_Bounding_Coordinate: -71.8395096758
      East_Bounding_Coordinate: -71.6936840435
      North_Bounding_Coordinate: 42.7732121988
      South_Bounding_Coordinate: 42.7041753603
  Keywords:
    Theme:
      Theme_Keyword_Thesaurus: ISO 19115 Topic Categories
      Theme_Keyword: elevation
    Theme:
      Theme_Keyword_Thesaurus: None
      Theme_Keyword: contours
      Theme_Keyword: hypsography
      Theme_Keyword: LiDAR
      Theme_Keyword: Squannacook River
    Place:
      Place_Keyword_Thesaurus: None
      Place_Keyword: United States
      Place_Keyword: Northeast
      Place_Keyword: New England
      Place_Keyword: New Hampshire
      Place_Keyword: Squannacook River
      Place_Keyword: HUC 10 0107000403
  Access_Constraints: None
  Use_Constraints: Please cite NH GRANIT.
  Point_of_Contact:
    Contact_Information:
      Contact_Organization_Primary:
        Contact_Organization: GRANIT, Earth Systems Research Center
        Contact_Person: GRANIT Database Manager
      Contact_Position: Database Manager
      Contact_Address:
        Address_Type: mailing and physical address
        Address: Morse Hall, University of New Hampshire
        City: Durham
        State_or_Province: NH
        Postal_Code: 03824
        Country: US
      Contact_Voice_Telephone: 603-862-1792
      Contact_Facsimile_Telephone: 603-862-0188
      Contact_Electronic_Mail_Address: granit@unh.edu
      Hours_of_Service: 8:30AM-5PM, EST
  Data_Set_Credit: NH GRANIT
  Native_Data_Set_Environment:
    Microsoft Windows 7 Version 6.1 (Build 7601) Service Pack 1; Esri ArcGIS 10.6.1; Esri ArcGIS Pro 2.3.3

Data_Quality_Information:
  Attribute_Accuracy:
    Attribute_Accuracy_Report:
      The critical attribute of this data is the contour elevation, the absolute accuracy of which has been affected by a number of processing steps. The original LiDAR elevation source DEMs had a 0.7 - 2 meter or better nominal post spacing (GSD) and a bare earth vertical accuracy of 7 - 18 centimeters RMSEz. Prior to contouring, the input raster was FILTERED using a 3x3 circular neighborhood. The original elevation units of meters were converted to feet using a factor of 3.2808. The isolines were also smoothed using the ArcGIS SMOOTH LINE tool.
    Quantitative_Attribute_Accuracy_Assessment:
      Attribute_Accuracy_Value: Floating point
      Attribute_Accuracy_Explanation: None
  Logical_Consistency_Report:
    Polyline topology was used to ensure that contours do not intersect or overlap.
  Completeness_Report:
    Data are complete for the State of New Hampshire, and reflect the content of the source datasets.
  Lineage:
    Source_Information:
      Source_Citation:
        Citation_Information:
          Originator:
            GRANIT, Earth Systems Research Center, University of New Hampshire
          Publication_Date: 200601
          Title: New Hampshire Hydrography Dataset
      Type_of_Source_Media: Digital data
      Source_Time_Period_of_Content:
        Time_Period_Information:
          Range_of_Dates/Times:
            Beginning_Date: 1956
            Ending_Date: 2005
        Source_Currentness_Reference: Ground_Condition
      Source_Citation_Abbreviation: HUC_10
      Source_Contribution: NHD HUC 10 watershed delineations
    Source_Information:
      Source_Citation:
        Citation_Information:
          Originator: Photo Science, Inc.
          Publication_Date: 2011
          Title: Coastal New Hampshire 2011 LiDAR collection
      Type_of_Source_Media: Digital data
      Source_Time_Period_of_Content:
        Time_Period_Information:
          Range_of_Dates/Times:
            Beginning_Date: 20110506
            Ending_Date: 20110630
        Source_Currentness_Reference: Ground_Condition
      Source_Citation_Abbreviation: Coastal_LiDAR_DEM
      Source_Contribution: Input LiDAR DEM
    Source_Information:
      Source_Citation:
        Citation_Information:
          Originator: Quantum Spatial, Inc.
          Publication_Date: 2016
          Title: USGS Connecticut River NH State Plane LiDAR
      Type_of_Source_Media: Digital data
      Source_Time_Period_of_Content:
        Time_Period_Information:
          Range_of_Dates/Times:
            Beginning_Date: 20151024
            Ending_Date: 20160429
        Source_Currentness_Reference: Ground_Condition
      Source_Citation_Abbreviation: Connecticut_LiDAR_DEM
      Source_Contribution: Input LiDAR DEM
    Source_Information:
      Source_Citation:
        Citation_Information:
          Originator: Woolpert, Inc.
          Publication_Date: 2014
          Title: Isle of Shoals Lidar
      Type_of_Source_Media: Digital data
      Source_Time_Period_of_Content:
        Time_Period_Information:
          Single_Date/Time:
            Calendar_Date: 20131208
        Source_Currentness_Reference: Ground_Condition
      Source_Citation_Abbreviation: Isles_of_Shoals_LiDAR_DEM
      Source_Contribution: Input LiDAR DEM
    Source_Information:
      Source_Citation:
        Citation_Information:
          Originator: Federal Emergency Management Agency
          Publication_Date: 20120914
          Title:
            TERRAIN, Merrimack HUC 8 Watershed, Massachusetts and New Hampshire
      Type_of_Source_Media: Digital data
      Source_Time_Period_of_Content:
        Time_Period_Information:
          Single_Date/Time:
            Calendar_Date: 20120914
        Source_Currentness_Reference: Ground_Condition
      Source_Citation_Abbreviation: Merrimack_LiDAR_DEM
      Source_Contribution: Input LiDAR DEM
    Source_Information:
      Source_Citation:
        Citation_Information:
          Originator: Federal Emergency Management Agency
          Publication_Date: 20110715
          Title: TERRAIN, Nashua, Massachusetts
      Type_of_Source_Media: Digital data
      Source_Time_Period_of_Content:
        Time_Period_Information:
          Single_Date/Time:
            Calendar_Date: 20110128
        Source_Currentness_Reference: Ground_Condition
      Source_Citation_Abbreviation: Nashua_LiDAR_DEM
      Source_Contribution: Input LiDAR DEM
    Source_Information:
      Source_Citation:
        Citation_Information:
          Originator: Quantum Spatial, Inc.
          Publication_Date: 20180830
          Title: Umbagog NH/ME 2016 LiDAR
      Type_of_Source_Media: Digital data
      Source_Time_Period_of_Content:
        Time_Period_Information:
          Range_of_Dates/Times:
            Beginning_Date: 20160406
            Ending_Date: 20180524
        Source_Currentness_Reference: Ground_Condition
      Source_Citation_Abbreviation: Umbagog_LiDAR_DEM
      Source_Contribution: LiDAR DEM
    Source_Information:
      Source_Citation:
        Citation_Information:
          Originator: Photo Science, Inc.
          Publication_Date: Unpublished Material
          Title:
            White Mountain National Forest Lidar (USGS Contract: G10PC00026 Task Order Numbers: G10PD01309 and G10PD00088)
      Type_of_Source_Media: Digital data
      Source_Time_Period_of_Content:
        Time_Period_Information:
          Range_of_Dates/Times:
            Beginning_Date: 20101111
            Ending_Date: 20120419
        Source_Currentness_Reference: Ground_Condition
      Source_Citation_Abbreviation: WMNF_2011_LiDAR_DEM
      Source_Contribution: LiDAR DEM
    Source_Information:
      Source_Citation:
        Citation_Information:
          Originator: Photo Science, Inc.
          Publication_Date: Unpublished Material
          Title:
            White Mountain National Forest Lidar (USGS Contract: G10PC00026 Task Order Numbers: G12PD00775)
      Type_of_Source_Media: Digital data
      Source_Time_Period_of_Content:
        Time_Period_Information:
          Range_of_Dates/Times:
            Beginning_Date: 20121106
            Ending_Date: 20121117
        Source_Currentness_Reference: Ground_Condition
      Source_Citation_Abbreviation: WMNF_2012_LiDAR_DEM
      Source_Contribution: LiDAR DEM
    Source_Information:
      Source_Citation:
        Citation_Information:
          Originator: Quantum Spatial, Inc.
          Publication_Date: 20150410
          Title: G14PD01014 - White Mountain National Forest3 LiDAR - FY2014
      Type_of_Source_Media: Digital data
      Source_Time_Period_of_Content:
        Time_Period_Information:
          Range_of_Dates/Times:
            Beginning_Date: 20141028
            Ending_Date: 20141106
        Source_Currentness_Reference: Ground_Condition
      Source_Citation_Abbreviation: WMNF_2014_LiDAR_DEM
      Source_Contribution: LiDAR DEM
    Source_Information:
      Source_Citation:
        Citation_Information:
          Originator:
            GRANIT, Earth Systems Research Center, University of New Hampshire
          Publication_Date: 1992
          Title: New Hampshire Political Boundaries at 1:24,000 Scale
      Type_of_Source_Media: Digital data
      Source_Time_Period_of_Content:
        Time_Period_Information:
          Range_of_Dates/Times:
            Beginning_Date: 1953
            Ending_Date: 1990
        Source_Currentness_Reference: Ground_Condition
      Source_Citation_Abbreviation: PBP
      Source_Contribution: New Hampshire state outline
    Process_Step:
      Process_Description:
        Created an Esri Mosaic Dataset comprising Coastal_LiDAR_DEM, Connecticut_LiDAR_DEM, Isles_of_Shoals_LiDAR_DEM, Merrimack_LiDAR_DEM, Nashua_LiDAR_DEM, Umbagog_LiDAR_DEM, WMNF_2011_LiDAR_DEM, WMNF_2012_LiDAR_DEM, and WMNF_2014_LiDAR_DEM. This interim data set is referenced to UTM Zone 19N, NAD83, meters with a vertical datum of NAVD88, meters.
      Source_Used_Citation_Abbreviation:
        Coastal_LiDAR_DEM, Connecticut_LiDAR_DEM, Isles_of_Shoals_LiDAR_DEM, Merrimack_LiDAR_DEM, Nashua_LiDAR_DEM, Umbagog_LiDAR_DEM, WMNF_2011_LiDAR_DEM, WMNF_2012_LiDAR_DEM, and WMNF_2014_LiDAR_DEM
      Process_Date: 201809
      Source_Produced_Citation_Abbreviation: DEM
    Process_Step:
      Process_Description:
        Ran ArcGIS BUFFER tool using PBP as input and a buffer distance of 500-feet.
      Source_Used_Citation_Abbreviation: PBP
      Process_Date: various
      Source_Produced_Citation_Abbreviation: PBP_BUF
    Process_Step:
      Process_Description:
        Ran ArcGIS CLIP to extract HUC_10 polygons in and within 500-feet of New Hampshire (PBP_BUF)
      Source_Used_Citation_Abbreviation: HUC_10, PBP_BUF
      Process_Date: various
      Source_Produced_Citation_Abbreviation: HUC_10_CLIP
    Process_Step:
      Process_Description:
        Selected the HUC_10_CLIP polygon of interest from within ArcGIS Pro. Ran an in-house ArcGIS Pro model which comprises the following steps: Buffer the selected HUC_10_CLIP polygon by 1500 meters - HUC_10_CLIP_1; Set process extent to HUC_10_CLIP_1 polygon; Run COPY RASTER to extract rectangular dem from DEM - DEM_1; Run EXTRACT BY MASK to subset DEM_1 to the HUC_10_CLIP_1 shape; Run FOCAL STATISTICS using an Inverse Distance weighted neighborhood and the Sum output statistic - DEM_2; Run DIVIDE on the DEM_2 raster using the sum of the focal statistics neighborhood (10.50713904) as the divisor; Run the CONTOUR tool using DEM_2 as the input raster, a contour interval of 2 and a Z-factor of 3.2808 - CON_1; CLIP CON_1 by HUC_10 - CON_2; DICE CON_2 with a maximum vertex count of 5000 (output spatial reference system, NHSP, NAD83) - CON_3; Add a field named INDEX; Populate INDEX with values of 10 and 100 to flag 10 and 100-foot contours.
      Source_Used_Citation_Abbreviation: HUC_10, PBP_BUF
      Process_Date: various
      Source_Produced_Citation_Abbreviation: CONTOURS
    Process_Step:
      Process_Description:
        Create, validate and fix the following topology errors: contour must not intersect, contour must not overlap, contour must not self-intersect, contour must not self-overlap.
      Source_Used_Citation_Abbreviation: CONTOURS
      Process_Date: various
      Source_Produced_Citation_Abbreviation: CONTOURS
    Process_Step:
      Process_Description:
        Smooth contours using the ArcGIS SMOOTH LINE tool with the PAEK smoothing algorithm and a 5-meter smoothing tolerance.
      Source_Used_Citation_Abbreviation: CONTOURS
      Process_Date: various
      Source_Produced_Citation_Abbreviation: CONTOURSSMOOTH
    Process_Step:
      Process_Description:
        Final processing included; Create, validate and fix the following topology errors: contour must not intersect, contour must not overlap, contour must not self-intersect, contour must not self-overlap. In some coastal areas, spurious contours found in the ocean (presumably a result of wave action) were manually deleted.
      Source_Used_Citation_Abbreviation: CONTOURSSMOOTH
      Process_Date: various
      Source_Produced_Citation_Abbreviation: CONTOURSSMOOTH

Spatial_Data_Organization_Information:
  Direct_Spatial_Reference_Method: Vector
  Point_and_Vector_Object_Information:
    SDTS_Terms_Description:
      SDTS_Point_and_Vector_Object_Type: String
      Point_and_Vector_Object_Count: 23212

Spatial_Reference_Information:
  Horizontal_Coordinate_System_Definition:
    Planar:
      Map_Projection:
        Map_Projection_Name: NAD 1983 StatePlane New Hampshire FIPS 2800 Feet
        Transverse_Mercator:
          Scale_Factor_at_Central_Meridian: 0.9999666666666667
          Longitude_of_Central_Meridian: -71.66666666666667
          Latitude_of_Projection_Origin: 42.5
          False_Easting: 984250.0
          False_Northing: 0.0
      Planar_Coordinate_Information:
        Planar_Coordinate_Encoding_Method: coordinate pair
        Coordinate_Representation:
          Abscissa_Resolution: 0.0003280833333333333
          Ordinate_Resolution: 0.0003280833333333333
        Planar_Distance_Units: foot_us
    Geodetic_Model:
      Horizontal_Datum_Name: North American 1983
      Ellipsoid_Name: GRS 1980
      Semi-major_Axis: 6378137.0
      Denominator_of_Flattening_Ratio: 298.257222101
  Vertical_Coordinate_System_Definition:
    Altitude_System_Definition:
      Altitude_Datum_Name: NAVD88
      Altitude_Resolution: varies
      Altitude_Distance_Units: foot

Entity_and_Attribute_Information:
  Detailed_Description:
    Entity_Type:
      Entity_Type_Label: Contour_2ft_0107000403_smooth
      Entity_Type_Definition: 2-foot elevation contours
      Entity_Type_Definition_Source: GRANIT
    Attribute:
      Attribute_Label: OBJECTID
      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: Id
      Attribute_Definition: Software populated id.
      Attribute_Definition_Source: Esri
      Attribute_Domain_Values:
        Unrepresentable_Domain:
          Sequential unique whole numbers that are automatically generated by the software.
    Attribute:
      Attribute_Label: Contour
      Attribute_Definition: Elevation contour interval in feet.
      Attribute_Definition_Source: Esri
      Attribute_Domain_Values:
        Unrepresentable_Domain:
          Elevation contour intervals automatically generated by the software.
    Attribute:
      Attribute_Label: Shape_Length
      Attribute_Definition: Length of feature in internal units.
      Attribute_Definition_Source: Esri
      Attribute_Domain_Values:
        Unrepresentable_Domain: Positive real numbers that are automatically generated.
    Attribute:
      Attribute_Label: INDEX
      Attribute_Definition: Value of index contour
      Attribute_Definition_Source: GRANIT
      Attribute_Domain_Values:
        Enumerated_Domain:
          Enumerated_Domain_Value: 10
          Enumerated_Domain_Value_Definition: 10' index contour
          Enumerated_Domain_Value_Definition_Source: GRANIT
        Enumerated_Domain:
          Enumerated_Domain_Value: 100
          Enumerated_Domain_Value_Definition: 100' index contour
          Enumerated_Domain_Value_Definition_Source: GRANIT

Distribution_Information:
  Distributor:
    Contact_Information:
      Contact_Organization_Primary:
        Contact_Organization: GRANIT, Earth Systems Research Center
        Contact_Person: GRANIT Database Manager
      Contact_Position: GRANIT Database Manager
      Contact_Address:
        Address_Type: mailing and physical address
        Address: Morse Hall, University of New Hampshire
        City: Durham
        State_or_Province: NH
        Postal_Code: 03824
        Country: US
      Contact_Voice_Telephone: 603-862-1792
      Contact_Facsimile_Telephone: 603-862-0188
      Contact_Electronic_Mail_Address: granit@unh.edu
      Hours_of_Service: 8:30AM-5PM, EST
  Distribution_Liability:
    Digital data in NH GRANIT represent the efforts of the contributing agencies to record information from the cited source materials. Earth Systems Research Center, under contract to the NH Office of Strategic Initiatives, and in consultation with cooperating agencies, maintains a continuing program to identify and correct errors in these data. OSI, ESRC, and the cooperating agencies make no claim as to the validity or reliability or to any implied uses of these data.
  Standard_Order_Process:
    Digital_Form:
      Digital_Transfer_Information:
        Format_Name: Esri file geodatabase
        Transfer_Size: 126 MBs
      Digital_Transfer_Option:
        Online_Option:
          Computer_Contact_Information:
            Network_Address:
              Network_Resource_Name: Network_Resource_Name: <URL:http://www.granit.unh.edu>
    Fees: No charge when downloaded from the Internet.
  Technical_Prerequisites: Ability to read/import Esri file geodatabase format.

Metadata_Reference_Information:
  Metadata_Date: 20190930
  Metadata_Contact:
    Contact_Information:
      Contact_Organization_Primary:
        Contact_Organization: GRANIT, Earth Systems Research Center
        Contact_Person: GRANIT Database Manager
      Contact_Position: GRANIT Database Manager
      Contact_Address:
        Address_Type: physical
        Address: 8 College Rd
        City: Durham
        State_or_Province: New Hampshire
        Postal_Code: 03824
        Country: US
      Contact_Voice_Telephone: 603-862-1792
      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

Generated by `mp` version 2.8.13 on Thu Nov 14 14:43:22 2019