Citation:
Citation_Information:
Originator: Gregory J. Walsh
Originator: Stewart F. Clark, Jr.
Publication_Date: 1999
Title:
Bedrock Geologic Map of the Windham Quadrangle, Rockingham and Hillsborough Counties, New Hampshire:
Polygon coverage for bedrock geologic units.
Edition: 1.0
Geospatial_Data_Presentation_Form: map
Series_Information:
Series_Name: U.S. Geological Survey Open-File Report
Issue_Identification: 99-8
Publication_Information:
Publication_Place: Reston, Virginia
Publisher: U.S. Geological Survey
Online_Linkage: http://pubs.usgs.gov/of/1999/of99-8/
Other_Citation_Details: scale 1:24,000
Description:
Abstract:
Polygon coverage for bedrock geologic units.
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 (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.
Not intended for use at scales larger than 1:24,000.
Supplemental_Information:
The geology dataset was printed and visually reviewed by the map authors
and other USGS staff for geologic integrity, completeness, and accuracy
of linework. The report received a standard internal peer review as
per USGS Open-File Reports.
Access_Constraints:
Neither the United States Government nor any agency thereof, nor
any of their employees, make any warranty, expressed or implied, or
assumes any legal liability or responsibility for the accuracy,
completeness, or usefulness or any information, apparatus, product or
process disclosed in this report, or represents that its use would not
infringe privately owned rights. The act of distribution shall not
constitute any such warranty and no responsibility is assumed by the
USGS in the use of this data, or related materials. Reference therein to
any specific commercial product, process, or service by trade name,
trademark, manufacturer, or otherwise does not necessarily constitute or
imply its endorsement, recommendation, or favoring by the United States
Government or any agency thereof.
This geologic map is a guide to the bedrock geology at
1:24,000 scale, but it is not a substitute for site specific data.
Status:
Progress: completed
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -71.3786087
East_Bounding_Coordinate: -71.24776459
North_Bounding_Coordinate: 42.87654114
South_Bounding_Coordinate: 42.74621201
Keywords:
Theme:
Theme_Keyword_Thesaurus: USGS Thesaurus
Theme_Keyword: geology
Theme_Keyword: geologic maps
Theme_Keyword: bedrock geologic units
Theme_Keyword: geospatial datasets
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Categories
Theme_Keyword: geoscientificInformation
Place:
Place_Keyword_Thesaurus: none
Place_Keyword: 7.5-minute Windham quadrangle, New Hampshire
Place:
Place_Keyword_Thesaurus: Augmented FIPS 10-4 and FIPS 6-4
Place_Keyword: f33015 = Rockingham
Native_Data_Set_Environment: dgux UNIX, ARC/INFO version 7.0.4
Cross_Reference:
Citation_Information:
Originator: Gregory J. Walsh
Originator: Stewart F. Clark, Jr.
Publication_Date: 1999
Publication_Time:Title: Bedrock Geologic Map of the Windham Quadrangle, New Hampshire
Edition: 1.0
Geospatial_Data_Presentation_Form: map
Series_Information:
Series_Name: U.S. Geological Survey Open-File Report
Issue_Identification: 99-8
Publication_Information:
Publication_Place: Reston, Virginia
Publisher: U.S. Geological Survey
Online_Linkage: http://pubs.usgs.gov/of/1999/of99-8/
