index250

Identification Information

[smtype]

Citation Information

Originator	Maine Office of Geographic Information Systems (MEGIS)
Publication Date	19990701
Publication Time	Unknown
Title	index250
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 (MEGIS)
Other Citation Details	1:250000
Online Linkage	http://megis.maine.gov/catalog/
[smcilnkh]	true
[smcisrcs]	250000
[smcisrcm]	online
Calendar Date	19990701
Time of Day	Unknown
[smcisrcc]	publication date

Abstract

INDEX250 contains 1:250,000 scale neatlines for USGS 1 by 2 degree quadrangle maps covering Maine. INDEX250 is the coverage 250KINDEX renamed and projected to NAD83.

Purpose

INDEX250 was created to show 1:250,000 scale neatlines for USGS 1x2 degree quadrangles.

Time Period of Content

Calendar Date	19990701
Time of Day	Unknown
Currentness Reference	publication date

Status

Progress	Complete
Maintenance and Update Frequency	As needed

Bounding Coordinates

West Bounding Coordinate	-71.3
East Bounding Coordinate	-66.8
North Bounding Coordinate	47.6
South Bounding Coordinate	42.96083

Keywords

Theme	quadrangles, index (Maine GIS Thesaurus-Theme)
Theme	location (ISO Keyword Thesaurus)
Place	Maine, Gulf of Maine, United States (Maine GIS Thesaurus-Place)
Stratum	human dimensions (GCMD Parameter Keyword)

Access Constraints

none

Use Constraints

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. In the use of Maine GIS data, please check sources, scale, accuracy, currentness and other available information. Please confirm that you are using the correct copy of both data and metadata from the Maine GIS Data Catalog. Updates, corrections, and feedback, incorporated in the Maine GIS database are made in accordance with "Data Standards for Maine Geographic Information Systems", 2002 and coordinated by MEGIS

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

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/

[smbrowse]

false

Attribute Accuracy Report

The item NAME carries the USGS official name for each 1:250000 scale quadrangle.

Logical Consistency Report

Data meets "Data Standards for Maine Geographic Information Systems, March 1990". Spatial topology is clean and free of errors. The coverage has been CLEANED and BUILT with polygon topology.

Completeness Report

Data set is complete. The coverage was GENERATED from a digital file and projected to NAD83.

Horizontal Positional Accuracy Report

Approximate horizontal accuracy is 127 meters, assuming source data meets National Map Accuracy Standards.

Horizontal Positional Accuracy Value

127

Horizontal Positional Accuracy Explanation

Data was derived from digital data that meets or exceeds National Map Accuracy Standards for 1:250,000 scale.

Vertical Positional Accuracy Report

Not applicable

Citation Information

Originator	U.S. Geological Survey (USGS)
Publication Date	multiple dates
Publication Time	Unknown
Title	(250k) USGS 1:250,000 scale quadrangles
Geospatial Data Presentation Form	map
Series Name	National Mapping Program Standard Series Topographic Maps
Issue Identification	USGS 1x2 Degree Series
Publication Place	Reston VA
Publisher	U.S. Geological Survey
Other Citation Details	Publication date is unique to each quadrangle in the map series. Standard 1x2 quadrangles cover geographic areas of 4580 to 8669 square miles. 1 inch at map scale represents about 4 miles.
Online Linkage	http://mapping.usgs.gov/mac/maplists/howtoselectmaps.html
[smcilnkh]	false
[smcisrcs]	250000
[smcisrcm]	paper
Beginning Date	19560101
Beginning Time	Unknown
Ending Date	19801231
Ending Time	Unknown
[smcisrcc]	publication date

Source Scale Denominator

250000

Type of Source Media

paper

Beginning Date

19560101

Beginning Time

Unknown

Ending Date

19801231

Ending Time

Unknown

Source Currentness Reference

publication date

Source Citation Abbreviation

250k

Source Contribution

INDEX250 is 250kindex renamed and projected to NAD83. The index was originally generated by Maine Office of GIS staff using the known coordinates for the corners of the USGS 1:250000 scale quadrangles.

Process Description

INDEX250 is the 250kindex renamed and projected to NAD83. The index was originally GENERATED by Maine Office of GIS staff using the known coordinates for the corners of the USGS 1x2 degree map series. The item NAME carries the USGS official name for each quadrangle.

Source Used Citation Abbreviation

250k

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 and 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

David Kirouac

Address Type

mailing and physical address

Address

MEGIS174 SHS

City

Augusta

State or Province

Postal Code

04330

Country

USA

Contact Voice Telephone

(207) 215-6936

Contact Electronic Mail Address

david.kirouac@maine.gov

Hours of Service

8:00 AM - 4:00 PM

Cloud Cover

Direct Spatial Reference Method

Vector

SDTS Point and Vector Object Type

Area chain

Point and Vector Object Count

[smcaptur]

false

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

Entity Type Label

INDEX250

Entity Type Definition

polygon feature class

Entity Type Definition Source

Environmental Systems Research Institute, Inc. (ESRI)

Attribute Label

NAME

Attribute Definition

USGS 1:250000 scale quadrangle name

Attribute Definition Source

USGS 1 x 2 degree map series

Codeset Name

USGS 250k quadrangle name

Codeset Source

USGS

Beginning Date of Attribute Values

Attribute Label

TILE-NAME

Attribute Definition

USGS 1:250000 quadrangle name

Codeset Name

USGS 250k quadrangle name

Codeset Source

USGS

Beginning Date of Attribute Values

Entity and Attribute Overview

The item NAME carries the USGS official name for each 1:250000 scale quadrangle.

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

The item NAME carries the USGS official name for each 1:250000 scale quadrangle.

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. A link to a trial copy WinZip software is available at http://megis.maine.gov/links/.

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. A link to a trial copy WinZip software is available at http://megis.maine.gov/links/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.comSee http://megis.maine.gov/links/ for a link to ArcExplorer 9.x .

[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/ You may also see http://megis.maine.gov/links/ for a link to ArcExplorer 9.x

Beginning Date

19990701

Beginning Time

Unknown

Ending Date

Present

Ending Time

Unknown

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.

[smdistty]

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

20000630

Metadata Review Date

20100114

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 Metadata

Metadata Standard Version

FGDC-STD-001-1998

Metadata Access Constraints

None

Metadata Use Constraints

None