bathym100

Identification Information

Citation Information

Originator	Maine Department of Conservation (MEDOC), Maine Geological Survey (MGS)
Publication Date	19991130
Publication Time	Unknown
Title	bathym100
Geospatial Data Presentation Form	vector digital data
Series Name	Maine GIS
Issue Identification	SDE server; Internet Data Catalog
Publication Place	Augusta ME
Publisher	Maine Office of Geographic Information Systems
Other Citation Details	1:100000
Online Linkage	http://megis.maine.gov/catalog/
[smcisrcs]	100000
[smcisrcm]	online
Beginning Date	19560101
Beginning Time	Unknown
Ending Date	19831231
Ending Time	Unknown
[smcisrcc]	source dates

Abstract

BATHYM100 contains bathymetry lines for the Gulf of Maine at a scale of 1:100,000 showing depth in 10 meter intervals. This dataset was developed by the Maine Geological Survey using USGS 30 X 60 minute series topographic-bathymetric maps. Bathymetric contours are coded with depth in feet (10 meter interval mean lower low water datum) Spatial topology varies from good to poor.

Purpose

Not intended for navigational purposes. Data at this scale is suitable for planning at studies at the regional level. Not intended for use in navigation. Not recommended for use at scales greater than 1:100,000

Time Period of Content

Beginning Date	19560101
Beginning Time	Unknown
Ending Date	19831231
Ending Time	Unknown
Currentness Reference	source dates

Status

Progress	Complete
Maintenance and Update Frequency	None planned

Bounding Coordinates

West Bounding Coordinate	-70.734
East Bounding Coordinate	-66.81008
North Bounding Coordinate	45.2109
South Bounding Coordinate	42.99687

Keywords

Theme	bathymetry, water depth, coastal waters, depth (Maine GIS Thesaurus-Theme)
Theme	oceans, elevation (ISO Keyword Thesaurus)
Place	Maine, Gulf of Maine, United States (Maine GIS Thesaurus-Place)
Stratum	oceans (GCMD Parameter Keyword)

Access Constraints

none

Use Constraints

Not intended for use in navigation. Users must assume responsibility in determining the usability of this data for their purposes. Digital maps retain the accuracy of their source materials. The best use of data mapped at scales of 1:500,000 and 1:250,000 is in statewide planning and studies; at 1:100,000 in regional planning and studies; at 1:62,500 and 1:24,000 in detailed studies and local planning; and at 1:12,000 and 1:5,000 or larger scales in parcel level studies and detailed local planning.

Contact Organization

(MEDOCMGS) Maine Department of Conservation, Maine Geological Survey

Contact Person

Director, Earth Resource Information

Address Type

mailing address

Address

22 State House Station

City

Augusta

State or Province

Postal Code

04333-0022

Country

USA

Contact Voice Telephone

207 287 2801

Data Set Credit

Credit should always be given to the data source and/or originator when the data is transferred or printed.

Native Data Set Environment

Maine Office of Information Technology (OIT) Oracle 9i, Maine Office of Geographic Information Systems (MEGIS), Maine GIS SDE, SDEUSER, SDE.DEFAULT, Maine GIS Internet Data Catalog http://megis.maine.gov/catalog/

Attribute Accuracy Report

Line coding was spot checked only, by symbolized display of digital file with source materials. Please report errors to Maine Office of Geographic Information Systems.

Completeness Report

Data set is complete.

Horizontal Positional Accuracy Report

Approximate horizontal positional accuracy is 51 meters, assuming source data meets National Map Accuracy Standards.

Horizontal Positional Accuracy Value

Horizontal Positional Accuracy Explanation

Compilation base data meets National Map Accuracy Standards for 1:100,000 scale.

Vertical Positional Accuracy Report

National Map Accuracy Standard applies to USGS topographic maps. At all map scales, the maximum allowable vertical tolerance is one half the published contour interval or 5 meters -mean low lower water datum.

Citation Information

Originator	U.S. Geological Survey (USGS), U.S. Department of Commerce (USDOC), National Oceanic and Atmospheric Administration (NOAA) National Ocean Service (NOS)
Publication Date	19850101
Publication Time	Unknown
Title	(100kbath) 1:100,000 scale metric topographic-bathymetric maps
Edition	43070-A1-TB-100
Geospatial Data Presentation Form	map
Series Name	USGS Topographic-Bathymetric Maps
Issue Identification	1:100000 scale Topographic-Bathymetric
Publication Place	Reston VA
Publisher	U.S. Geological Survey and National Ocean Service
Other Citation Details	On topographic-bathymetric maps, contour lines show elevations of the land areas above sea level, and isobaths (bathymetric contours) show the form of the land below the water surface. Because coastal zones include both land and water, maps of such areas include both topographic and bathymetric data. In order to produce these coastal maps, the National Ocean Service provided bathymetric data to be added to USGS topographic maps. The combined map serves the needs of oceanographers, marine geologists, land use planners, physical scientists, conservationists, and others having an interest in management of the coastal zone, the wetlands, and the offshore environment.
Online Linkage	http://mapping.usgs.gov/mac/isb/pubs/booklets/usgsmaps/usgsmaps.html
[smcilnkh]	false
[smcisrcs]	100000
[smcisrcm]	paper
Beginning Date	19560101
Beginning Time	Unknown
Ending Date	19831231
Ending Time	Unknown
[smcisrcc]	publication date

Source Scale Denominator

100000

Type of Source Media

paper

Beginning Date

19560101

Beginning Time

Unknown

Ending Date

19831231

Ending Time

Unknown

Source Currentness Reference

publication date

Source Citation Abbreviation

100kbath

Source Contribution

Bathym100 was developed from USGS 30 x 60 minute series topographic-bathymetric maps.

Process Description

Data digitized by Maine Geological Survey from USGS 30 X 60 minute series topographic-bathymetric maps was quality and spot checked for line coding accuracy. Depression marks were removed.

Source Used Citation Abbreviation

100kbath

Process Date

19991031

Contact Organization

(MEGIS) Maine Office of Geographic Information Systems

Contact Person

GIS Coordinator

Contact Position

GIS Coordinator

Address Type

mailing address

Address

State House Station 174

City

Augusta

State or Province

Postal Code

04333-0174

Country

USA

Contact Voice Telephone

207 624-7700

Contact Facsimile Telephone

207 287-3842

Hours of Service

Monday through Friday 0800 - 1700 EST

Process Description

The Maine Office of GIS completed the conversion of all final data layers from NAD27 to NAD83 in July 1999. All the data layers were converted using the ArcInfo (version 7.2.1) NADCON conversion by using the "project" command. All data was copied to double precision, projected to NAD83, and then copied back to single precision. It was decided to keep the NAD27 quad structure instead of generating new quad boundaries from NAD83 coordinates - all indexes (quads) were projected to NAD83 by using the same process previously described. All MEGIS data libraries in ArcInfo Librarian were repopulated using the NAD83 indexes and data.

Process Date

19990701

Contact Organization

(MEGIS) Maine Office of Geographic Information Systems

Contact Person

GIS Coordinator

Contact Position

GIS Coordinator

Address Type

mailing address

Address

State House Station 174

City

Augusta

State or Province

Postal Code

04333-0174

Country

USA

Contact Voice Telephone

207 624-7700

Contact Facsimile Telephone

207 287-3842

Hours of Service

Monday through Friday 0800 - 1700 EST

Cloud Cover

Direct Spatial Reference Method

Vector

SDTS Point and Vector Object Type

Area chain

Point and Vector Object Count

24813

[smcaptur]

true

Grid Coordinate System Name

UTM Zone Number

Scale Factor at Central Meridian

0.9996

Longitude of Central Meridian

-69

Latitude of Projection Origin

False Easting

500000

False Northing

Planar Coordinate Encoding Method

Abscissa Resolution

Ordinate Resolution

Horizontal Datum Name

North American Datum of 1983

Ellipsoid Name

Geodetic Reference System 80

Semi-major Axis

6378137

Denominator of Flattening Ratio

298.257

Altitude Datum Name

National Geodetic Vertical Datum of 1929

Depth Datum Name

Mean lower low water

Depth Resolution

Elevations shown to the nearest meter. Bathymetric contour interval 10 meters with supplementary contours-mean lower low water datum. Relationship between the two datums is variable.

Depth Distance Units

meters

Depth Encoding Method

Attribute values

Entity Type Label

BATHYM100

Entity Type Definition

arc feature class

Entity Type Definition Source

Environmental Systems Research Institute, Inc. (ESRI)

Attribute Label

DEPTH

Attribute Definition

bathymetric contour depth 10 meter contours-mean lower low water datum

Range Domain Minimum

Range Domain Maximum

130

Attribute Units of Measurement

meters

Beginning Date of Attribute Values

Attribute Label

TAG

Attribute Definition

item used to select a single feature for labeling purposes

Enumerated Domain Value

Enumerated Domain Value Definition

yes, use point for labeling

Enumerated Domain Value

Enumerated Domain Value Definition

Do not use point for labeling.

Beginning Date of Attribute Values

Entity and Attribute Overview

BATHYM100 is coded with the item DEPTH for bathymetric contour depth at 10 meter intervals.

Entity and Attribute Detail Citation

The ArcView shapefile and ArcGIS geodatabase formats, commonly used for Maine GIS data, carry default identifiers and attributes that are software generated and/or important for internal recordkeeping. These are listed here to avoid repetition for every layer, and may not be repeated in the attribute descriptions and definitions of each layer. Common software generated identifiers and attributes in Maine GIS data include: FID (feature identifier), Shape (feature geometry), OBJECTID and SHAPE_lengt. In addition, most GIS formats will carry fields for PERIMETER, AREA and/or LENGTH according to feature geometry. These fields are typically available by default, with the units based on coordinate system or projection units of GIS data. Most GIS software packages also provide a means to calculate these values. It is important to test any columns containing PERIMETER, AREA or LENGTH values before using them for analysis purposes. These important values can be carried from format to format and become out-dated. Verify that the values are correct. Also, in your GIS software, please view the properties of data layers for the map units used to calculate these fields, and for the units set for display purposes.

Entity and Attribute Overview

BATHYM100 is coded with the item DEPTH for bathymetric contour depth at 10 meter intervals.

Entity and Attribute Detail Citation

Contact Organization

(MEGIS) Maine Office of Geographic Information Systems

Contact Person

GIS Coordinator

Contact Position

GIS Coordinator

Address Type

mailing address

Address

State House Station 174

City

Augusta

State or Province

Postal Code

04333-0174

Country

USA

Contact Voice Telephone

207 624-7700

Contact Facsimile Telephone

207 287-3842

Hours of Service

Monday through Friday 0800 - 1700 EST

Resource Description

http://megis.maine.gov/catalog/

Distribution Liability

Users must assume responsibility to determine the usability of this data for their purposes. Although these data have been processed successfully on a computer system at the Maine Office of Geographic Information Systems, no warranty expressed or implied is made by MEGIS regarding the utility of the data on any other system, nor shall the act of distribution constitute any such warranty. Neither the Maine Office of Geographic Information Systems, nor any of its contributors, is liable for misuse of the data, for damage, for transmission of viruses, or for computer contamination through the distribution of these data sets.

Format Name

ESRI Shapefile

Format Version Number

ARC Version 9.x

Format Specification

ArcView Shapefile Format

Format Information Content

MEGIS has made all vector layers, in the Maine GIS Internet Data Catalog, available in ESRI's ArcView shapefile format. A shapefile is a simple non-topological format that stores the geometry and attribute information for a set of geographic features as a set of vector (point, line, polygon) coordinates. Shapefiles draw quickly and directly in ArcView, ArcGIS, ArcExplorer. Shapefiles are a compatible data type for many other types of GIS software. Three files are fundamental to each shapefile: .shp stores the feature geometry (shape and location information); .shx stores the index of the feature geometry; .dbf a dBASE (TM) file stores the attribute information for the features. Other index files may be created to help speed analysis and query: these file formats are .sbn .sbx .ain .aix .fbn and .fbx. In addition you may find projection .prj, and metadata .xml, files associated with shapefiles.

File Decompression Technique

Data available from this website is in .zip compressed format. WinZip is a Windows based, PKZip-compatible compression utility. You will need a program like this to extract the data

Network Resource Name

http://megis.maine.gov/catalog/

[smhyperl]

-1

[accinstr]

These data are available to Internet browsers for download from the Maine GIS Internet Data Catalog - http://megis.maine.gov/catalog/Data available from this website is in .zip compressed format. WinZip is a Windows based, PKZip-compatible compression utility. You will need a program like this to extract the data.If you are not already a GIS user, free software for viewing these files is available from Environmental Systems Research Institute, Inc. (ESRI) - www.esri.com

[smdistty]

Fees

Data may be downloaded from Maine GIS Internet Data Catalog at no charge.

Turnaround

Data is available for immediate download from the Maine GIS Internet Data Catalog.

Technical Prerequisites

If you are not already a GIS user, free software for viewing these files is available from Environmental Systems Research Institute, Inc. (ESRI) http://www.esri.com/

Beginning Date

20001130

Ending Date

Present

Contact Organization

Maine Office of Geographic Information Systems

Contact Position

GIS Coordinator

Address Type

mailing address

Address

State House Station 174

City

Augusta

State or Province

Postal Code

04333-0174

Country

USA

Contact Voice Telephone

(207) 624-7700

Contact Facsimile Telephone

(207) 287-3842

Hours of Service

Monday through Friday 0800 - 1700 EST

Distribution Liability

Users must assume responsibility to determine the usability of this data for their purposes.

Format Name

ARCSDE

Format Version Number

ArcSDE 9.x

Format Information Content

Oracle 9i

[accinstr]

Please contact the Maine Office of GIS (MEGIS) for access instructions.

Fees

Access is available through Maine's wide area network; WAN users may contact the Maine Office of Information Technology, Maine Office of Geographic Information Systems (MEGIS) for a login.

Metadata Reference Information

Metadata Date

20000701

Metadata Review Date

20100113

Metadata Future Review Date

Metadata Contact

Contact Organization	(MEGIS) Maine Office of Geographic Information Systems
Contact Person	GIS Coordinator
Contact Position	GIS Coordinator
Address Type	mailing address
Address	State House Station 174
City	Augusta
State or Province	ME
Postal Code	04333-0174
Country	USA
Contact Voice Telephone	207 624-7700
Contact Facsimile Telephone	207 287-3842
Hours of Service	Monday through Friday 0800 - 1700 EST

Metadata Standard Name

FGDC Content Standards for Digital Geospatial MetadataMetadata

Metadata Standard Version

FGDC-STD-001-1998

Metadata Access Constraints

none

Metadata Use Constraints

none