Bedrock Geologic Map of the New Milford Quadrangle, Litchfield and Fairfield Counties, Connecticut

Metadata:

Identification_Information:
Citation:
Citation_Information:
Originator: Gregory J. Walsh
Publication_Date: 2003
Title:
Bedrock Geologic Map of the New Milford Quadrangle, Litchfield and Fairfield Counties, Connecticut
Edition: 1.0
Geospatial_Data_Presentation_Form: map
Series_Information:
Series_Name: U.S. Geological Survey Open-File Report
Issue_Identification: 03-487
Publication_Information:
Publication_Place: Reston, Virginia
Publisher: U.S. Geological Survey
Online_Linkage: <http://pubs.usgs.gov/of/2003/of03-487>
Description:
Abstract:
The bedrock geology of the New Milford quadrangle, Litchfield and Fairfield Counties, Connecticut is described in this report. The database includes contacts of bedrock geologic units, faults, outcrops, structural geologic information, and photos.
Purpose:
The map was published as part of a study of fractured bedrock aquifers. The digital data are intended for use by all government, academic, commercial, or other agencies in need of digital geologic map information.
Supplemental_Information:
Data were originally collected in UTM coordinates, zone 18, NAD 1927, and reprojected to geographic coordinates (Lat/Long), NAD 1983. The database is accompanied by two large format color maps, an explanatory pamphlet, and a readme.txt file.

 

 

This report is available from the internet at <http://pubs.usgs.gov/of/2003/of03-487/> or a CD is also available from -
U.S. Geological Survey Information Services
Box 25286 Federal Center
Denver, CO 80225
1-888-ASK-USGS
ask@usgs.gov

Printed paper maps are available from -
USGS Maps on Demand <http://rmmcweb.cr.usgs.gov/public/mod/>

The database includes geologic map data in Arc/Info export-interchange file equivalents (files with *.e00 extensions). These coverages provide the scientific content of the mapped data. The coverages include -
CONTX--Polygon coverage for the contacts of geologic map units
FAULTS--Line coverage of geologic faults
OUTCROP--Polygon coverage of outcrops
STRUX--Point coverage of geologic structure data
PHOTO--Point coverage of photographs
Base Map Data -
NMbase.tif--Black and white TIFF bitmap image
NMbase.tfw--Worldfile for registering image base
The data are also available as ArcView shapefiles (*.dbf, *.shp, *.shx) and related DBF tables.
 

Point_of_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Geological Survey
Contact_Person: Gregory J. Walsh
Contact_Position: Geologist
Contact_Address:
Address_Type: mailing address
Address: P.O. Box 628
City: Montpelier
State_or_Province: Vermont
Postal_Code: 05601
Country: USA
Contact_Voice_Telephone: 802-828-4528
Contact_Facsimile_Telephone: 802-828-4465
Contact_Electronic_Mail_Address: gwalsh@usgs.gov
Browse_Graphic:
Browse_Graphic_File_Name: <http://pubs.usgs.gov/of/2003/of03-487/034871p.gif> and <http://pubs.usgs.gov/of/2003/of03-487/034872p.gif>
Browse_Graphic_File_Description:
Reduced-size image showing the general layout of the two map sheets.
Browse_Graphic_File_Type: GIF
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 2000
Ending_Date: 2003
Currentness_Reference: publication date
Status:
Progress: complete
Maintenance_and_Update_Frequency: none planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -73.5000
East_Bounding_Coordinate: -73.3750
North_Bounding_Coordinate: 41.6250
South_Bounding_Coordinate: 41.5000
Keywords:
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: geology
Theme_Keyword: geologic
Theme_Keyword: bedrock
Place:
Place_Keyword_Thesaurus: None
Place_Keyword: Connecticut
Place_Keyword: New Milford
Place_Keyword: Litchfield
Place_Keyword: Fairfield
Access_Constraints: none
Use_Constraints:
Although all data released in this report have been used by the USGS, no warranty, expressed or implied, is made by the USGS as to the accuracy of the data and related materials and (or) the functioning of the software. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
All attributes digitized during the creation process were verified by displaying the lines and points in the database with respect to the USGS 7.5-minute topographic map, but no formal tests were performed.
Logical_Consistency_Report:
These data are believed to be logically consistent, though no tests were performed. Line geometry is topologically clean.
Completeness_Report:
The geologic contacts were delineated on a USGS 7.5-minute topographic map based on observations at the outcrops shown in the database. Not all outcrops within the area were identified or visited during mapping. The geologic contacts might change if additional outcrops are discovered or exposed as the natural land changes or as the result of development. The features in the database are not based on legal parcels or definitions.
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
The data were created on a USGS 7.5 minute topographic map at 1:24000 scale. Therefore, the horizontal accuracy is assumed to be within National Map Accuracy Standards, with a horizontal accuracy of 45.6 feet at the 95% confidence level. Locational information in the field was provided by Rockwell PLGR+96 GPS receivers using the Federal precise positioning service.  GPS positions were adjusted to match the existing topographic base.  Raw GPS data are located in the STRUX point coverage.
Vertical_Positional_Accuracy:
Vertical_Positional_Accuracy_Report:
The data were delineated on a USGS 7.5 minute topographic map at 1:24000 scale. Therefore, the vertical accuracy is assumed to be within National Map Accuracy Standards, with a vertical accuracy of 11.9 feet at the 95% confidence level.
Lineage:
Source_Information:
Source_Citation:
Citation_Information:
Originator: Gregory J. Walsh
Publication_Date: 2003
Title:
Bedrock geologic map of the New Milford quadrangle, Litchfield and Fairfield Counties, Connecticut
Edition: 1.0
Geospatial_Data_Presentation_Form: map
Publication_Information:
Publication_Place: Reston, Virginia
Publisher: U.S. Geological Survey
Other_Citation_Details:
Walsh, G.J., 2003, Bedrock geologic map of the New Milford quadrangle, Litchfield and Fairfield Counties, Connecticut: U.S. Geological Survey Open-File Report 03-487, scale 1:24,000.
Online_Linkage: <http://pubs.usgs.gov/of/2003/of03-487>
Source_Scale_Denominator: 24000
Type_of_Source_Media: mylar
Source_Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 2000
Ending_Date: 2001
Source_Currentness_Reference: publication date
Source_Citation_Abbreviation: Walsh 2003
Source_Contribution:
The geology was mapped by Walsh in 2000 and 2001. The database represents original work by Walsh
Process_Step:
Process_Description:
Geology mapped by Walsh in 2000 and 2001 at a scale of 1:24,000. Locational information was provided by Rockwell PLGR+96 GPS receivers using the Federal precise positioning service. The line and polygon data were compiled on mylar 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 8.0.2. 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.
Source_Used_Citation_Abbreviation: Walsh 2003
Process_Date: 2003
Source_Produced_Citation_Abbreviation: Walsh 2003
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Organization: U.S. Geological Survey
Contact_Person: Gregory J. Walsh
Contact_Position: Geologist
Contact_Address:
Address_Type: mailing and physical address
Address: P.O. Box 628
City: Montpelier
State_or_Province: Vermont
Postal_Code: 05601
Country: USA
Contact_Voice_Telephone: 802-828-4528
Contact_Facsimile_Telephone: 802-828-4465
Contact_Electronic_Mail_Address: gwalsh@usgs.gov
Hours_of_Service: 0900 to 1700 eastern standard time
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
Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Geographic:
Latitude_Resolution: .0001
Longitude_Resolution: .0001
Geographic_Coordinate_Units: Decimal Degrees
Geodetic_Model:
Horizontal_Datum_Name: North American Datum of 1983
Ellipsoid_Name: Geodetic Reference System 80
Semi-major_Axis: 6,378,137
Denominator_of_Flattening_Ratio: 298.257
Entity_and_Attribute_Information:
Overview_Description:
Entity_and_Attribute_Overview: <http://pubs.usgs.gov/of/2003/of03-487/readme.txt>
Entity_and_Attribute_Detail_Citation: <http://pubs.usgs.gov/of/2003/of03-487/readme.txt>
Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Geological Survey - Information Services
Contact_Address:
Address_Type: mailing address
Address: Box 25286 Federal Center
City: Denver
State_or_Province: Colorado
Postal_Code: 80225
Country: USA
Contact_Voice_Telephone: 1-888-ASK-USGS
Contact_Electronic_Mail_Address: ask@usgs.gov
Hours_of_Service: 0900 to 1700 mountain standard time
Resource_Description: USGS Open-File Report 03-487
Distribution_Liability:
These data were prepared by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, make any warranty, or implied, or assume any legal liability or responsibility the accuracy, completeness, or usefulness of any information, product or process disclosed in this report, and represents its use would not infringe privately owned rights. The act distribution shall not constitute any such warranty, and no responsibility is assumed by the USGS in the use of this data related materials. Reference therein to any specific commercial product, process, or related service by trade name, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring the United States Government or any agency thereof.
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: Arc/Info export and ArcView shapefile
Digital_Transfer_Option:
Offline_Option:
Offline_Media: compact disc
Recording_Format: CD ISO 9660 standard
Compatibility_Information:
Windows 95/98/NT/2000/XP, Macintosh OS 7.1 or greater (.pdf, .gif, .tif., and .htm files only), UNIX
Fees: $20 per map + $5 S&H, $32 for CD, Internet data is free
Ordering_Instructions:
Call 1-888-ASK-USGS or visit the web at <http://ask.usgs.gov> The compact disc and maps can be obtained from -
USGS Information Services
Box 25286 Denver, CO 80225
ask@usgs.gov
1-303-202-4200

 

 
 
 

Metadata_Reference_Information:
Metadata_Date: 20030219
Metadata_Review_Date: 2003
Metadata_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Geological Survey
Contact_Person: Gregory J. Walsh
Contact_Position: Geologist
Contact_Address:
Address_Type: Mailing and physical address
Address: P.O. Box 628
City: Montpelier
State_or_Province: VT
Postal_Code: 05663
Country: USA
Contact_Voice_Telephone: 802-828-4528
Contact_Facsimile_Telephone: 802-828-4465
Contact_Electronic_Mail_Address: gwalsh@usgs.gov
Hours_of_Service: 0900 to 1700 eastern standard time
Metadata_Standard_Name: FGDC CSDGM
Metadata_Standard_Version: FGDC-STD-001-1998
Generated by mp version 2.7.3 on Thu Feb 20 11:43:17 2003