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Strafford County Land Use - 1974

Strafford County Land Use - 1974

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Metadata:


Identification_Information:
Citation:
Citation_Information:
Originator: Complex Systems Research Center, University of New Hampshire
Publication_Date: 20031126
Title: Strafford County Land Use - 1974
Edition: One
Geospatial_Data_Presentation_Form: vector digital data
Publication_Information:
Publication_Place: Durham, New Hampshire
Publisher: Complex Systems Research Center, University of New Hampshire
Other_Citation_Details: None
Online_Linkage:
<URL:http://www.granit.sr.unh.edu/cgi-bin/nhsearch?dset=lu74/lu74017>
Larger_Work_Citation:
Citation_Information:
Originator: Complex Systems Research Center, University of New Hampshire
Publication_Date: 19860101
Title: NH GRANIT Database
Publication_Information:
Publication_Place: Durham, New Hampshire
Publisher: Complex Systems Research Center, University of New Hampshire
Online_Linkage: <URL:http://www.granit.sr.unh.edu>
Description:
Abstract:
This data set contains 13 categories of land use data (polygons) for Strafford County, New Hampshire. The primary data used to derive the layer were 1974 1:20,000-scale, black & white, digital orthophotos and 1998 land use data (<URL:http://www.granit.sr.unh.edu/cgi-bin/nhsearch?dset=lu98/lu98017>).
Purpose:
These photo-interpreted land use data are intended for use by state, regional, and municipal resource managers, planning agencies, and scientific researchers. The data are part of a larger effort, sponsored by the Cooperative Institute for Coastal and Estuarine Environmental Technology (CICEET) at the University of New Hampshire, to analyze past and current development trends and their impact on water quality, and to model future development pressures in the region and their likely water quality impacts.
Supplemental_Information:
Data distribution tile: county

This data set was derived by modifying a 1998 land use data layer for Strafford County. Standards governing the development of the 1998 data are available in LUSTANDARDS.doc.

A countywide mosaic of the 74 orthophotography - 74DOM017 - is available from GRANIT (<URL:http://www.granit.sr.unh.edu/cgi-bin/nhsearch?dset=dom74/74dom017>). A companion data file - PHOTOPNT74 - may also be downloaded from the web site (<URL:http://www.granit.sr.unh.eduj/cgi-bin/nhsearch?dset=photopnt/photopnt74>). This point layer documents the name, photo centerpoint, date of acquisition, and other pertinent information for each photo used to create the mosaic.

Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 1974
Currentness_Reference: source photography date
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -71.45251
East_Bounding_Coordinate: -70.69919
North_Bounding_Coordinate: 43.57577
South_Bounding_Coordinate: 42.73424
Keywords:
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: Land use
Theme_Keyword: Landuse
Theme_Keyword: Land cover
Theme_Keyword: Landcover
Theme_Keyword: Photo interpretation
Place:
Place_Keyword_Thesaurus: None
Place_Keyword: United States
Place_Keyword: Northeast
Place_Keyword: New England
Place_Keyword: New Hampshire
Place_Keyword: Strafford County
Access_Constraints: None
Use_Constraints: Not for legal use.
Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Organization: Complex 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
Browse_Graphic:
Browse_Graphic_File_Name:
<URL:http://www.granit.sr.unh.edu/cgi-bin/load_file?PATH=/data/database/d-webdata/lu74/lu74017/browse.gif>
Browse_Graphic_File_Description: gif image file
Browse_Graphic_File_Type: GIF
Data_Set_Credit:
GRANIT database, Complex Systems Research Center, University of New Hampshire
Native_Data_Set_Environment: ESRI ArcGIS 8.3


Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
Data were digitized on-screen by GRANIT staff by photo-interpreting 1:20,000-scale DOQs of Strafford County. Attribute coding was checked by on-screen overlay of the delineated land use polygons, displayed using transparent symbology, on the base data (e.g. the DOQs). This scrutiny detected any missing or erroneously labeled polygons. Data evaluation occurred at a scale no less than the smallest source photo scale of 1:20,000.

In addition, code domain checks ensured that only valid codes were assigned to features, and polygon "dissolve" operations identified any cases where adjacent polygons shared the same land use code.

Logical_Consistency_Report:
Polygon and arc-node topology exists. Topology checks were used to identify and eliminate any sliver polygons, dangling nodes, and/or other potential errors.
Completeness_Report: All of Strafford County was mapped and classified.
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
Data were generated primarily from photo interpretation of historic 1974 orthophotos (1:20,000-scale, black-and-white, 1-meter resolution, aerial photographs).
Lineage:
Source_Information:
Source_Citation:
Citation_Information:
Originator: US Geological Survey
Publication_Date: 1974
Title: 1974 Digital Orthophoto Quads (DOQs)
Source_Scale_Denominator: 20,000
Type_of_Source_Media: online
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 1974
Source_Currentness_Reference: source photography date
Source_Citation_Abbreviation: 74DOQ
Source_Contribution:
Provided the basic source photography for the delineation and interpretation of the land use features.
Source_Information:
Source_Citation:
Citation_Information:
Originator: Complex Systems Research Center, University of New Hampshire
Publication_Date: 20030922
Title: Strafford County Land Use - 1998
Source_Scale_Denominator: 12,000
Type_of_Source_Media: online
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 1998
Source_Currentness_Reference: source photography date
Source_Citation_Abbreviation: 98LU
Source_Contribution: Provided the initial land use data set.
Process_Step:
Process_Description:
The 98LU was overlain on the 74DOQs, and updated to reflect the features visible in the imagery. Because there is significant tile overlap in the source photography, the sequence in which the photos are displayed impacts the visible features for any area on the ground. (A listing of the display order is provided in 74photoorder017.txt.)

Using the documented photo sequence, on-screen digitizing/editing was performed to:

- eliminate any land use features that were not present in 1974 - redelineate, as necessary, any features that had changed from the earlier date

Source_Used_Citation_Abbreviation: 98LU
Source_Used_Citation_Abbreviation: 74DOQ
Process_Date: 20031126
Process_Step:
Process_Description:
The land use feature delineations were checked by visually checking the symbolized features displayed over the source DOQs. Modifications were made, as warranted, during the quality control process - to correct incorrectly classed lands, and to fix digitizing errors such as overshoots and sliver polygons.
Process_Date: 20031126


Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Vector
Point_and_Vector_Object_Information:
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: Complete chain
Point_and_Vector_Object_Count: 28556
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: Label point
Point_and_Vector_Object_Count: 11707
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: GT-polygon composed of chains
Point_and_Vector_Object_Count: 11707
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: Point
Point_and_Vector_Object_Count: 4


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: 2800
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: 0.000512
Ordinate_Resolution: 0.000512
Planar_Distance_Units: survey feet
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


Entity_and_Attribute_Information:
Detailed_Description:
Entity_Type:
Entity_Type_Label: LU74017.PAT
Entity_Type_Definition: Polygon attribute table
Entity_Type_Definition_Source: ESRI
Attribute:
Attribute_Label: AREA
Attribute_Definition: Area of feature in internal units squared.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain: 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: LU74017#
Attribute_Definition: Internal feature number.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain: Sequential unique whole numbers that are generated.
Attribute:
Attribute_Label: LU74017-ID
Attribute_Definition: User-defined feature number.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain: User defined
Overview_Description:
Entity_and_Attribute_Overview:
The coverage includes two user-defined attributes:

1. GRANITID - a 7-digit unique integer assigned sequentially to polygons in the data set.

2. LU - a 2-digit integer describing the land use feature, as follows:

Residential (11) - Individual houses, subdivisions and "in-town" residential areas Industrial/commercial (12) - Urban areas dominated by business operations Mixed urban (13) - Urban areas where commercial enterprise occupies part of a building/block and residential use occurs in another, adjacent part of the building/block. Also, miscellaneous urban uses, e.g. schools, military installations, etc. Transportation/roads (14) - Paved roadways, travel lane width, airports, or other public transportation features Railroads (15) - Railroad beds Auxiliary transportation (16) - Highway medians, clover leafs, etc. Playing fields/recreational (17) - Golf courses, baseball diamonds, football fields, etc. Agriculture (20) - Includes hay fields, row crops, fruit orchards, etc. Farmsteads (24) - Any buildings associated with farms Forested (40) - Land where trees are the dominant cover Water (50) - Open surface water Open wetlands (60) - Wetlands where the dominant vegetation is less than 20' in height Idle/other open (70) - Cemeteries, gravel pits, quarries, old fields, etc.

Entity_and_Attribute_Detail_Citation:
None


Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Complex Systems Research Center, University of New Hampshire
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
Resource_Description: Downloadable Data
Distribution_Liability:
Digital data in NH GRANIT represent the efforts of the contributing agencies to record information from the cited source materials. Complex Systems Research Center, under contract to the NH Office of State Planning, 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.
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: ARCE (Arc/Info Export), ESRI shapefile
Transfer_Size: 24.5 Mb (ARCE)
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name: <URL:http://www.granit.sr.unh.edu>
Fees:
No charge when downloaded from the Internet. Cost of reproduction for provision on CD/ROM of other media.
Ordering_Instructions:
Email GRANIT (granit@unh.edu) or order from web site (www.granit.sr.unh.edu).
Turnaround: Two weeks.
Technical_Prerequisites: None.

Metadata_Reference_Information:
Metadata_Date: 20031126
Metadata_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Complex Systems Research Center, University of New Hampshire
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
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
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

Generated by mp version 2.8.13 on Thu Dec 13 10:07:25 2007
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