Identification_Information:
Citation:
Citation_Information:
Originator: United States Geological Survey
Originating_Branch: Geologic Division
Publication_Date: 1999
Series Name: Open-File Report
Issue_Identification: Open-File ID number 99-8MOD

Title: Bedrock Geologic Map of the Windham Quadrangle, Rockingham and Hillsborough Counties, New Hampshire
Edition: 1.0
Authors: Gregory J. Walsh and Stewart F. Clark, Jr.
Online_Linkage: http://pubs.usgs.gov/openfile/of99-8/

Description:
Abstract: The bedrock geology of the 7.5-minute Windham quadrangle, New Hampshire
consists of deformed early Paleozoic crystalline metamorphic and intrusive
igneous rocks intruded by Mesozoic igneous dikes.
The geologic data was mapped during the summer of 1998 at a scale of
1:24,000.  The bedrock geology was mapped using standard techniques.
Locational information was provided by Rockwell PLGR+96 GPS receivers
using the federal precise positioning service.
The line and polygon data were compiled on a mylar greenline of the
7.5-minute quadrangle and scanned at 400 dpi on an Anatech Eagle 4080T
scanner.  The raster files (TIF) were converted to vector files (DXF)
using GTX OSR version 2.0 raster-to-vector conversion software.  The
vector files were imported to Arc/Info version 7.0.4. Point data
were collected with GPS and hand-held 3COM Palm Pilot III PDA computers.
Data from the PDAs were combined in Microsoft Access, and then imported
as ASCII text files and DBASE IV (dbf) files into Arc/Info.  The Arc/Info coverages
were registered and transformed to the New Hampshire State Plane Coordinate
system.

Purpose: The map was published as part of a study of the fractured bedrock aquifers
in the state of New Hampshire.  The digital data are intended for use by
all government, academic, commercial, or other agencies in need of digital
geologic map information.

Supplemental_Information:
Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date:
Currentness_Reference: The geology of the quadrangle was mapped in 1998

Status:
Progress: complete
Maintenance_and_Update_Frequency: none

Publication_Information:
Publication_Place: Reston, Virginia
Publisher: United States Geological Survey

Geospatial_Data_Presentation_Form: Original Map data Postscript


Physical_Domain:
Bounding_Coordinates:
Lower_Left_Horizontal_Coordinate: 0.0
Lower_Left_Vertical_Coordinate: 0.0
Upper_Right_Horizontal_Coordinate: 66.0 inches
Upper_Right_Vertical_Coordinate: 34.0 inches

Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -71.375
East_Bounding_Coordinate: -71.25
North_Bounding_Coordinate:  +42.875
South_Bounding_Coordinate:  +42.75

Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Planar:
Map_Projection:
Map_Projection_Name: State_Plane_Coordinate_System
  SPCS_Zone_Identifier: 4676
Planar_Distance_Units: feet

Geodetic_Model:
Horizontal_Datum_Name: North American Datum of 1983
Ellipsoid_Name: Clarke 1866
Semi-major_Axis: 6378206.4
Denominator_of_Flattening_Ratio: 294.98

Metadata_Reference_Information:
Metadata_Date: cd 19990525
Metadata_Review_Date: cd 19990525
Metadata_Contact: Greg Walsh
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Geological Survey
Contact_Person: Greg Walsh
Contact_Position: Geologist
Contact_Address:
Address_Type: mailing address
Address: U.S. Geological Survey
Address: P.O. Box 628
City: Montpelier
State_or_Province: Vermont
Postal_Code: 05601
Country: United States
Contact_Voice_Telephone: (802) 828-4528
Contact_Facsimile_Telephone: (802) 828-4465
Contact_Electronic_Mail_Address: gwalsh@usgs.gov
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
Map_Scale: 1:24,000
Additional_Text: Explanatory text accompanies the map and is available from the
Online_Linkage at http://pubs.usgs.gov/openfile/of99-8/