Preliminary Integrated Geologic Map Databases for the United States: Connecticut, Maine, Massachusetts, New Hampshire, New Jersey, Rhode Island, Vermont
Preliminary Integrated Geologic Map Databases for the United States: Connecticut, Maine, Massachusetts, New Hampshire, New Jersey, Rhode Island, Vermont
Edition: version 1.0
Geospatial_Data_Presentation_Form: map
Series_Information:
Series_Name: U.S. Geological Survey Open-File Report
These metadata are specifically for the State of Massachusetts, one state in the national compilation of state geologic map databases. The digital geologic state map of Massachusetts was prepared by Dr. Rudi Hon (Boston College) in 1998 under contract to the USGS. Subsequent editing of the spatial data by the USGS was limited to fitting a standardized state boundary to the data, standardizing the arc coding, reprojecting the data, and minor edits of arc or polygon attributes to conform with the paper map.
This open-file report is one of several that present the preliminary results of the USGS Mineral Resources Program activity to compile a national-scale geologic map database to support national and regional level projects, including mineral resource and geoenvironmental assessments. The only comprehensive sources of regional- and national-scale geologic maps are state geologic maps with scales ranging from 1:100,000 to 1:1,000,000. Digital versions of these state maps form the core of what is presented here. Because no adequate geologic map exists for the state of Alaska, it is being compiled in regional blocks that also form part of this national database. It is expected that this series will completed by approximately the end of 2007. These maps and databases are being released in blocks of states or, in the case of Alaska, as compiled blocks of 1:250,000-scale quadrangles as chapters in this series. For Alaska, formal maps as well as databases are being published here, whereas for the conterminous U.S. only state databases and preview graphics are presented, because published maps for most states already exist. For Alaska these regional compilations will form the base for compiling a new geologic map of the state. As documented in CONUSdocumentationNENJ.pdf, standards for the conterminous U.S. are somewhat different than those for Alaska and Hawaii.
Purpose:
A primary goal of this work is to develop geologic map datasets with standardized structure and attribution. The database design and standards are documented in CONUSdocumentationNENJ.pdf of this series. The intent is that contiguous databases can be merged seamlessly and without any additional effort. In addition to a common database structure, the conterminous U.S. state databases (the contiguous 48 states) have been fitted to a set of standard state boundaries so that, when states are merged, they match without slivers or overlap. No attempt has been made to reconcile differences in mapping across state boundaries.
Supplemental_Information:
This database consists of up to five major Arc/Info GIS datasets for each state;
- one: geologic map with formations,
- two: faults (where present),
- three: dikes (where present),
- four: miscellaneous line features (where present),
- five: miscellaneous point features (where present).
Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 2006
Currentness_Reference: publication date
Status:
Progress: Complete
Maintenance_and_Update_Frequency: none planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -73.509
East_Bounding_Coordinate: -69.781
North_Bounding_Coordinate: 42.887
South_Bounding_Coordinate: 41.142
Keywords:
Theme:
Theme_Keyword_Thesaurus: none
Theme_Keyword: geology
Place:
Place_Keyword_Thesaurus: none
Place_Keyword: USA
Place_Keyword: Massachusetts
Theme:
Theme_Keyword_Thesaurus: National Geologic Map Database Catalog themes, augmented
Theme_Keyword: 3100 - Vector
Theme_Keyword: 3110 - ESRI
Theme_Keyword: 3112 - export
Theme_Keyword: 1100 - Geology
Theme_Keyword: 1101 - General
Place:
Place_Keyword_Thesaurus: Augmented FIPS 10-4 and FIPS 6-4, version 1.0
Place_Keyword: US25 = Massachusetts
Access_Constraints: none
Use_Constraints:
This database is not meant to be used or displayed at any scale other
than 1:500,000.
Any hardcopies utilizing these data sets shall clearly indicate
their source. If the licensee has modified the data in any way
they are obligated to describe the types of modifications they
have performed on the hardcopy map. Licensee specifically agrees
not to misrepresent these data sets, nor to imply that changes they
made were approved by the U.S. Geological Survey.
Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Suzanne W. Nicholson
Contact_Organization: U.S. Geological Survey
Contact_Address:
Address_Type: mailing and physical address
Address: 12201 Sunrise Valley Dr. MS954
City: Reston
State_or_Province: VA
Postal_Code: 20192
Country: USA
Contact_Voice_Telephone: 703-648-6344
Contact_Electronic_Mail_Address:swnich@usgs.gov
Data_Set_Credit:
State Geologic Map Compilation (SGMC) activity of the National Surveys and Analysis
projects of the US Geological Survey Mineral Resources Program.
Native_Data_Set_Environment: ARC/INFO version 8.3 and 9.1
Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
The values of the attributes ROCKTYPE1 and ROCKTYPE2 were assigned based on the information in the legends of the source maps (most of which are paper). The definitions of these values are described in the draft document Geologic Map Classification version 6.1 (Johnson and others); available at the following website: <http://geology.usgs.gov/dm>
Logical_Consistency_Report:
All internal polygons were checked for closure with vendor software and on hard copy plots. Overshoots and undershoots have been deleted or corrected as appropriate.
Completeness_Report:
Bodies of water are classified as water, and the geologic units underlying them are not included in this coverage.
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
Accuracy of Massachusetts state boundary and those arcs intersecting it: The accuracy of the state boundary arcs is based on the 1:100,000 scale original data used to produce this boundary. (Johnson, Bruce R. and Leveritch, Beth, 1998, 1:100,000 Scale State Boundaries of the Conterminous United States: U.S. Geological Survey, unpublished (see metadata file: st100kmeta.txt, CONUSdocumentationNENJ.pdf))
Those internal arcs intersecting the state boundary were extended or shortened as needed to complete polygons, possibly creating a small amount of error.
Lineage:
Source_Information:
Source_Citation:
Citation_Information:
Originator: Rudolph Hon
Publication_Date: unpublished material
Title: Digital Geologic Map of Massachusetts
Geospatial_Data_Presentation_Form: vector digital data
Publication_Information:
Publication_Place: Boston College
Publisher: unknown
Online_Linkage: none
Source_Scale_Denominator: 250,000
Type_of_Source_Media: vector
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: unknown
Source_Currentness_Reference: publication date
Source_Citation_Abbreviation: mageol
Source_Contribution: provided geology for state map
Source_Information:
Source_Citation:
Citation_Information:
Originator: Bruce R. Johnson
Publication_Date: unpublished
Title:
1:100,000 Scale State Boundaries of the Conterminous United States
Geospatial_Data_Presentation_Form: vector data
Other_Citation_Details:
Arc/INFO coverage developed by Bruce Johnson. Derived from USGS 100,000-scale DLG boundary layer quadrangles.
Source_Scale_Denominator: 100,000
Type_of_Source_Media: online
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 1998
Source_Currentness_Reference: unknown
Source_Citation_Abbreviation: state boundaries
Source_Contribution: provided linework of the conterminous state boundaries
Source_Information:
Source_Citation:
Citation_Information:
Originator: Bruce R. Johnson
Publication_Date: unpublished
Title: Geologic Map Unit Classification, ver. 6.1
Geospatial_Data_Presentation_Form: unknown
Other_Citation_Details:
Document has been modified and is included in Appedices of the publication.
Source of lithologic codes and specific rock names found in ROCKTYPE1 and ROCKTYPE2.
Process_Step:
Process_Description:
The purpose of this standardization is to allow all SGMC covers to be seamlessly joined without any additional effort to form regional or national level digital maps. Note that for Alaska, the state is being compiled as blocks of 1:250k quadrangles that will ultimately be used to compile a new state map. Douglas Stoeser (USGS) and Ric Wilson (USGS) are co-coordinators for the overall SGMC effort, with Stoeser coordinating work on the mainland states and Wilson coordinating work for Alaska and Hawaii.
Process_Date: 2003 - 2006
Process_Step:
Process_Description:
C.L. Dicken obtained the digital geologic map of Massachusetts from Julia Mueller. The coverage was re-projected into the following:
projection: Lambert Conformal Conic
units: meters
datum: NAD27
standard parallel 1: 33 0 0.000
standard parallel 2: 45 0 0.000
central meridian: -100 0 0.000
reference latitude: 0 0 0.000
false easting: 0.00000
false northing: 0.00000
(Note: Attributes associated with the generation of the coverages were not deleted.
PAT - shape, area, perimeter, coverage#, and coverage-id
AAT - shape, fnode#, tnode#, lnode#, rnode#, length, coverage#, and coverage-id)
All attributes were deleted except map_code.
The values from map_code where then calculated into a new field called orig_label.
Process_Date: 2006
Process_Step:
Process_Description:
The relevant state outline (arcs) was removed from the coverage and replaced with the arcs from the 1:100,000 Scale State Boundaries of the Conterminous United States.
This allows for a seamless fit of each state to a standard state boundary base.
Process_Date: 2006
Process_Step:
Process_Description:
The following attributes were exported from Filemaker as a .dbf:
orig_label, map_symbol2, unit_link, reference_id, unit_age, rocktype1, and rocktype2.
orig_label reflects the original map symbol used on the source map
map_symbol2 reflects map-symbol1 with the addition of a province number
unit_link is an auto generated field based on map-symbol2 and the state abbreviation (e.g. MA001) that produces a unique identifier for each map unit
reference_id was populated with an alphanumeric code (e.g. US001) that designates the source used for the linework and other references used to describe the age or lithologies of the unit.
unit_age was populated with general age assignment
rocktype1 records dominant lithology (does not imply minimum percentage of abundance), using standardized data dictionary
rocktype2 records second most dominant lithology, using standardized data dictionary
The attributes were then converted using the following structure:
item name: orig_label
width: 12
output: 12
type: c
item name: sgmc_label
width: 16
output: 16
type: c
item name: unit_link
width: 18
output: 18
type: c
item name: source
width: 6
output: 8
type: c
item name: unit_age
width: 60
output: 60
type: c
item name: rocktype1
width: 40
output: 40
type: c
item name: rocktype2
width: 40
output: 40
type: c
Process_Date: 2005
Process_Step:
Process_Description:
Once the .dbf was in the correct format with standardized column widths and data structure, it was converted into a lookup table (.lut) in Arc/Info. Then a joinitem was performed to join the look-up table to the polygon attribute table. orig_label was used as the merge item.
Process_Date: 2006
Process_Step:
Process_Description:
Next, in preparing the uniform .aat file, the following items were added to the table:
item name: arc-code
width: 3
output: 3
type: i
item name: arc-para1
width: 3
output: 3
type: i
item name: arc-para2
width: 3
output: 3
type: i
item name: source
width: 6
output: 8
type: c
Process_Date: 2006
Process_Step:
Process_Description:
Arc-code was populated using the paper map source to tag the lines using the AAT line type data dictionary (see CONUSdocumentationNENJ.pdf in this series).
Arc-para1 was populated when additional information was available such as identifying the upthrown side of a fault or direction of thrusting on a fault. (see CONUSdocumentationNENJ.pdf)
Arc-para2 is a scratch field that is used mostly in Alaska.
Source was populated with an alphanumeric code (e.g. US001) that designates the source used for the linework.
Process_Date: 2006
Process_Step:
Process_Description:
Once the .aat and the .pat were populated with the correct attributes, the coverage was exported as an .e00 file (MAgeol_lcc.e00).
Then it was unprojected into geographic coordinates and exported again (MAgeol_dd.e00).
Process_Step:
Process_Description:
Faults were extracted from the coverage and created a separate fault coverage (MAfaults_lcc) and then exported (MAfaults_lcc.e00). File was unprojected into geographic coordinates (MAfaults_dd) and exported again (MAfaults_dd.e00).
Process_Date: 2006
Process_Step:
Process_Description:
Finally, the geology lines, geology polygons, and faults were converted into shapefiles; in both geographic coordinates and in Lambert Conformal Conic projection.
composite map label = ST + sgmc_label
This creates a unique identifier for every unit in the CONUS (continental United States) covers.
type: character
width: 18
output width: 18
An alphanumeric code (e.g. US001) that designates the source material used.
type: character
width: 6
output width: 8
Attribute_Definition_Source: Doug Stoeser (USGS)
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: MA001
Enumerated_Domain_Value_Definition:
Unpublished digital map of Massachusetts (Rudi Hon at Boston College, 1998).
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: US001
Enumerated_Domain_Value_Definition:
Johnson, Bruce R. and Leveritch, Beth, 1998, 1:100,000 Scale State Boundaries of the Conterminous United States: U.S. Geological Survey, unpublished (see metadata file: st100kmeta.txt, CONUSdocumentationNENJ.pdf)
Attribute:
Attribute_Label: unit_age
Attribute_Definition:
The geologic age from the source map used.
type: character
width: 60
output width: 60
Attribute_Definition_Source: Doug Stoeser (USGS)
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Cretaceous
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Devonian
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Devonian and Silurian
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Holocene
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Lower Cambrian
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Lower Cambrian and Proterozoic Z
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Lower Devonian
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Lower Devonian and Middle Ordovician
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Lower Devonian and Silurian
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Lower Devonian and Upper Silurian
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Lower Devonian or younger
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Lower Devonian, Silurian, or Proterozoic Z
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Lower Jurassic
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Lower Ordovician
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Lower Ordovician and Cambrian
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Lower Ordovician and Proterozoic Z
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Lower Pennsylvanian
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Lower Silurian
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Lower Silurian and Upper Ordovician
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Lower Silurian and Upper Ordovician?
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Lower Silurian or Upper Ordovician
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Middle Devonian
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Middle Ordovician
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Middle Ordovician or older
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Middle Pennsylvanian
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Middle and Lower Cambrian
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Middle and Lower Pennsylvanian
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Ordovician
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Ordovician and Proterozoic Z
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Ordovician or Proterozoic Z
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Ordovician to Proterozoic Z
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Ordovician, Cambrian, or Proterozoic Z
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Pennsylvanian
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Precambrian to Paleozoic
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Precambrian to Phanerozoic
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Precambrian to Silurian
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Proterozoic Y
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Proterozoic Z
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Proterozoic Z or younger
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Proterozoic Z to earliest Paleozoic
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Silurian
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Silurian or Ordovician
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Silurian?, Ordovician, or Proterozoic Z
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Upper Cambrian
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Upper Cambrian?
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Upper Pennsylvanian
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Upper Silurian
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Upper Triassic
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Upper and Middle Pennsylvanian
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: age uncertain
Attribute:
Attribute_Label: rocktype1
Attribute_Definition:
The predominant lithology found in the formation.
type: character
width: 40
output width: 40
Attribute_Definition_Source: Johnson Lith Class 6.1a
An alphanumeric code (e.g. US001) that designates the source material used.
type: character
width: 6
output width: 8
Attribute_Definition_Source: Doug Stoeser (USGS)
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: MA001
Enumerated_Domain_Value_Definition:
Unpublished digital map of Massachusetts (Rudi Hon at Boston College, 1998).
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: MA101
Enumerated_Domain_Value_Definition:
Source arcs were mistagged and have been corrected by C.L. Dicken.
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: MA102
Enumerated_Domain_Value_Definition:
Source arcs were in the wrong direction and have been “flipped” by C.L. Dicken.
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: MA103
Enumerated_Domain_Value_Definition:
Source arcs were mistagged and in the wrong direction and have been corrected and flipped by C.L. Dicken.
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: MA104
Enumerated_Domain_Value_Definition: C.L.Dicken added one arc (polygon).
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: MA201
Enumerated_Domain_Value_Definition:
Mistagged polygons were corrected by C.L. Dicken, so digital file now conforms to paper map.
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: US001
Enumerated_Domain_Value_Definition:
Johnson, Bruce R. and Leveritch, Beth, 1998, 1:100,000 Scale State Boundaries of the Conterminous United States: U.S. Geological Survey, unpublished (see metadata file: st100kmeta.txt, CONUSdocumentationNENJ.pdf)
Overview_Description:
Entity_and_Attribute_Overview:
Coding for polygon attributes:
NAME: FEATURE:
orig_label unmodified map unit symbols from source cover
sgmc_label orig_label modified for standard geologic age symbols and an
integer code added for province
unit_link sgmc_label and a state code identifier
source reference to source of data
unit_age geologic age
rocktype1 predominant lithology
rocktype2 second most predominant lithology
Coding for arc attributes:
NAME: FEATURE:
arc-code unique integer identifier
arc-para1 used where additional information is needed
arc-para2 scratch field
source reference to source of data
Coding for point attributes:
NAME: FEATURE:
point_feature name of feature on map
source reference to source of data
Coding for dikes (special arcs) attributes:
NAME: FEATURE:
orig_label unmodified map unit symbols from source cover
sgmc_label orig_label modified for standard geologic age symbols and an
integer code added for province
arc-code unique integer identifier
dike_lith general lithology
dike_age geologic age
source reference to source of data
Entity_and_Attribute_Detail_Citation: ESRI
Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization:
U.S. Geological Survey Information Services
Reston-ESIC
Any use of trade, product, or firm names is for
descriptive purposes only and does not imply endorsement by the USGS.
Although these data have been used by the USGS and have been successfully
imported into data base programs, no warranty, expressed or implied, is made
by the USGS as to how successfully or accurately the data can be imported into
any specific application software running on any specific hardware platform.
The fact of distribution shall not constitute any such warranty, and no
responsibility is assumed by the USGS in connection therewith.
This data base GIS is not meant to be used or displayed at any scale other than 1:500,000.
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: ARC/INFO export
Format_Version_Number: 9.0
Format_Information_Content: Geologic units and structural features