contours_2ft

Citation:

Citation Information:

Originator: CDM Federal Programs Corporation
Publication Date: 02/09/2009
Publication Time: Unknown
Title: contours_2ft
Geospatial Data Presentation Form: vector digital data
Series Information:

Series Name: Maine GIS
Issue Identification: SDE server; Internet Data Catalog

Publication Information:

Publication Place: Augusta ME
Publisher: Maine Office of Geographic Information Systems (MEGIS)

Other Citation Details: This layer will be available on the state SDE database and published on teh MEGIS internet data catalog.
Online Linkage: http://megis.maine.gov/catalog/

Description:

Abstract:
CONTOURS_2FT contains 2 foot interval contour lines for the coastal areas of York and Cumberland Counties from Old Orchard Beach to Harpswell. The contour lines were one of several data sets created from LiDAR collected in November 2006 by the Sanborn Map Company.
Purpose:
The Contours were originally derived from the LiDAR data sets, including Bare Earth and a Gridded DEM support Camp Dresser and McKee's continued development of updated Digital Flood Insurance Rate Maps and flood insurance studies for coastal areas located in Cumberland and York Counties, Maine. The contours were created primarily for determining areas of potential flooding. They are also useful to determine drainage, for hydrology studies, for determining slope and for delineating watersheds.
Time Period of Content:

Time Period Information:

Range of Dates/Times:

Beginning Date: 11/10/2006
Beginning Time: Unknown
Ending Date: 9/5/2007
Ending Time: Unknown

Currentness Reference: ground condition

Status:

Progress: In Work
Maintenance and Update Frequency: irregular

Spatial Domain:

Bounding Coordinates:

West Bounding Coordinate: -70.478536
East Bounding Coordinate: -69.614839
North Bounding Coordinate: 44.40458
South Bounding Coordinate: 43.517987

Keywords:

Theme:

Theme Keyword Thesaurus: Maine GIS Thesaurus-Theme
Theme Keyword: relief
Theme Keyword: topography
Theme Keyword: contours

Theme:

Theme Keyword Thesaurus: Maine GIS Thesaurus-Theme
Theme Keyword: hypsography
Theme Keyword: contours

Place:

Place Keyword Thesaurus: Maine GIS Thesaurus-Place
Place Keyword: Maine
Place Keyword: United States
Place Keyword: York County
Place Keyword: Cumberland County
Place Keyword: Augusta

Stratum:

Stratum Keyword Thesaurus: GCMD Parameter Keyword
Stratum Keyword: land surface

Access Constraints:
Secondary distribution by permission only. Please see Maine Office of Geographic Information Systems (MEGIS) License Agreement at http://megis.maine.gov/ . Any secondary distribution must have this documentation appended.
Use Constraints:
Acknowledgement of FEMA would be appreciated in products derived from these data. This digital data is produced for the purposes of updating/creating a DFIRM database.Users must assume responsibility in determining the usability of this data for their purposes. Digital maps retain the accuracy of their source materials. 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. The Maine Office of Geographic Information Systems (MEGIS) provides notice of updates and corrections directly to the Maine GIS Technical Group and Maine GIS Users, through the MEGISTECH and MEGISUSER list servers. To subscribe please contact MeGIS through the Maine Office of Information Technology (OIT) Customer Support Center (CSC) at (207) 624-7700. To request data correction in, or provide updates to Maine GIS data, please use the contact information contained in the metadata. 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 in consultation with the Maine GIS Executive Council.
Point of Contact:

Contact Information:

Contact Organization Primary:

Contact Organization: (MEGIS) Maine Office of Geographic Information Systems

Contact Position: GIS Coordinator
Contact Address:

Address Type: mailing address
Address: State House Station 145
City: Augusta
State or Province: ME
Postal Code: 04333-0145
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/, Maine GIS ArcIMS http://megisims.state.me.us/website/basemap/viewer.htm

Attribute Accuracy:

Attribute Accuracy Report:
Attribute accuracy is expected to be good, however, due to the large number of arcs, elevation codes are spot checked from a representative sample. Please report any elevation coding errors to the Maine Office of GIS
Logical Consistency Report: Spatial topology is clean and free of errors. The coverage has been BUILT to LINE and has ARC topology.
Completeness Report: Data set is complete.
Positional Accuracy:

Horizontal Positional Accuracy:

Horizontal Positional Accuracy Report: Approximate horizontal accuracy is 2 meters, assuming source data meets National Map Accuracy Standards.
Quantitative Horizontal Positional Accuracy Assessment:

Horizontal Positional Accuracy Value: 2
Horizontal Positional Accuracy Explanation:
MEGIS has limited information on how this data were created. Given the contour interval and the fact that the vertical accuracy is stated to adhere to National Map Accuracy Standards, we are assuming a corresponding level of horozontal accuracy. Then 90% of points sampled would fall within 2 meters of theri true position on teh ground.
Vertical Positional Accuracy:

Vertical Positional Accuracy Report: The vertial accuracy of the source data meet or exceed vertical National Map Accuracy Standards for 2-foot contour mapping.
Quantitative Vertical Positional Accuracy Assessment:

Vertical Positional Accuracy Value: 1
Vertical Positional Accuracy Explanation: Not more than 10% of the elevations tested would be in error by more than 1/2 of the contour interval or 1 foot.

Lineage:

Source Information:

Source Citation:

Citation Information:

Originator: Federal Emergecy Management Agency
Publication Date: 11/26/2006
Publication Time: Unknown
Title: LiDAR
Geospatial Data Presentation Form: remote-sensing image
Publication Information:

Publication Place: Augusta ME
Publisher: Maine Office of Geographic Information Systems (MEGIS)

Other Citation Details:
Sanborn Map Company furnished the collection, processing, and development of LiDAR for 584 square miles in Maine (215 square miles in York County, 369 square miles in Cumberland County) to support the FEMA Region 1 Map Modernization. All data was acquired during November 2006.
Online Linkage: \\Cos-svr-54\vol1\LIDAR\Lidar_Project_Status\032007004_ME_Tracking\AllMaine.shp

Type of Source Media: disc
Source Time Period of Content:

Time Period Information:

Range of Dates/Times:

Beginning Date:
Beginning Time: Unknown
Ending Date:
Ending Time: Unknown

Source Currentness Reference: ground condition

Source Citation Abbreviation: LiDAR
Source Contribution:
LIDAR (Light Detection and Ranging) is an optical remote sensing technology that measures properties of scattered light to find range and/or other information of a distant target. In this time period it is one of the more accurate means of determining elevation accurately by remote sensing. Sanborn Map Company furnished the collection, processing, and development of LiDAR for 584 square miles in Maine (215 square miles in York County, 369 square miles in Cumberland County) to support the FEMA Region 1 Map Modernization. All data was acquired during November 2006.
Process Step:

Process Description:
Using the Leica ALS-50 Light Detection and Ranging (LiDAR) system, flight lines were planned for standard density 1.4 meter GSD. The Flight plan for the project includes the following specifications to fully meet the project requirements - single pass density of approximately 1.4 square meters per sample * Swath width ~688 meters * Flight altitude 1200 meters * flight line spacing ~516 meters with ~125 meters overlap *Scan Frequency- 36 Hz *Scan Angle- 16 degrees * Aircraft ground speed -- 120 knots * System Calibration pre and post mission * Two GPS base stations within 30 KM. Multiple returns were recorded for each laser pulse along with an intensity value for each return. The data are calibrated for geographic referencing. Points are further processed, using TerraSolid? software, to classify return values. The first and last return data is filtered to remove the vegetation and above ground manmade features to yield a ground surface. The Bare Earth was then used to produce a 6' GRID DEM and a TIN. Independent checkpoint were used to validate the overall surface accuracy and have been provided and documented in a Lidar Acquisition Report.
Process Date: 2006/11/26
Source Produced Citation Abbreviation: LiDAR
Process Contact:

Contact Information:

Contact Person Primary:

Contact Person: Andy Lucero
Contact Organization: Sanborn Mapping Co.

Contact Position: Project Manager
Contact Address:

Address Type: mailing and physical address
Address: 1935 Jamboree Drive, Suite 100
City: Colorado Springs
State or Province: CO
Postal Code: 80920
Country: USA

Contact Voice Telephone: 719-528-5093
Contact Facsimile Telephone: 719-528-5093

Process Step:

Process Description:
The LIDAR data are calibrated for geographic referencing. Points are further processed, using TerraSolid? software, to classify return values. The first and last return data is filtered to remove the vegetation and above ground manmade features to yield a ground surface. The Bare Earth was then used to produce a 6' GRID DEM and a TIN. Independent checkpoint were used to validate the overall surface accuracy and have been provided and documented in a Lidar Acquisition Report. Utilizing the TIN, 2 foot contours were generated.
Source Used Citation Abbreviation: LiDAR
Process Date: 2006/11/31
Process Contact:

Contact Information:

Contact Person Primary:

Contact Person: Andy Lucero
Contact Organization: Sanborn Mapping Compant

Contact Position: Project Manager
Contact Address:

Address Type: mailing and physical address
Address: 1935 Jamboree Dr, Suite 100
City: Colorado Springs
State or Province: CO
Postal Code: 80920
Country: USA

Contact Voice Telephone: 719-264-5645
Contact Facsimile Telephone: 719-528-5093

Process Step:

Process Description: Additional 2 foot contour data was added to the data set in the area of Augusta. The metadata was updated accordingly.
Process Date: 02/09/2009
Process Contact:

Contact Information:

Contact Organization Primary:

Contact Organization: (MEGIS) Maine Office of Geographic Information Systems
Contact Person: Larry Harwood

Contact Position: Programmer Analyst
Contact Address:

Address Type: mailing address
Address: State House Station 145
City: Augusta
State or Province: ME
Postal Code: 04333-0145
Country: USA

Contact Voice Telephone: (207) 624-7700
Contact Facsimile Telephone: (207) 287-4563
Hours of Service: Monday through Friday 0800 - 1700 EST

Cloud Cover: 0

Direct Spatial Reference Method: Vector
Point and Vector Object Information:

SDTS Terms Description:

SDTS Point and Vector Object Type: String
Point and Vector Object Count: 325339

Horizontal Coordinate System Definition:

Planar:

Planar Coordinate Information:

Planar Coordinate Encoding Method: Coordinate Pair
Planar Distance Units: meters

Geodetic Model:

Horizontal Datum Name: North American Datum of 1983
Ellipsoid Name: Geodetic Reference System 80
Semi-major Axis: 6378137
Denominator of Flattening Ratio: 298.257

Vertical Coordinate System Definition:

Altitude System Definition:

Altitude Datum Name: National Geodetic Vertical Datum of 1988
Altitude Resolution: 2
Altitude Distance Units: feet
Altitude Encoding Method: Attribute values

Detailed Description:

Entity Type:

Entity Type Label: CONTOURS
Entity Type Definition: arc feature class
Entity Type Definition Source: Environmental Systems Research Institute, Inc. (ESRI)

Attribute:

Attribute Label: ELEVATION
Attribute Definition: elevation of arc in feet
Attribute Domain Values:

Enumerated Domain:

Enumerated Domain Value: from 74 to 282 in 2 foot intervals
Enumerated Domain Value Definition: ground elevation

Beginning Date of Attribute Values: 11/10/2006
Ending Date of Attribute Values: 11/26/2006

Attribute:

Attribute Label: LAYER
Attribute Definition: type of arc
Attribute Domain Values:

Enumerated Domain:

Enumerated Domain Value: INTERCON
Enumerated Domain Value Definition: unknown

Beginning Date of Attribute Values: 11/10/2006
Ending Date of Attribute Values: 11/26/2006

Overview Description:

Entity and Attribute Overview:
The Terrain data package is made up of several data themes containing primarily spatial information. These data supplement the Elevation datasets by providing additional information to aid flood risk evaluation and flood hazard area delineations
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.

Distributor:

Contact Information:

Contact Organization Primary:

Contact Organization: (MEGIS) Maine Office of Geographic Information Systems

Contact Position: GIS Coordinator
Contact Address:

Address Type: mailing address
Address: State House Station 145
City: Augusta
State or Province: ME
Postal Code: 04333-0145
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.
Standard Order Process:

Digital Form:

Digital Transfer Information:

Format Name: ARCSDE
Format Version Number: ArcSDE 9.x
Format Information Content: Oracle 9i

Digital Transfer Option:

Online Option:

Access Instructions: 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 Date: 2/9/2009
Metadata Review Date:
Metadata Future Review Date: 2/9/2010
Metadata Contact:

Contact Information:

Contact Organization Primary:

Contact Organization: Maine Office of Geographic Information Systems

Contact Position: GIS Coordinator
Contact Address:

Address Type: mailing address
Address: State House Station 145
City: Augusta
State or Province: ME
Postal Code: 04333-0145
Country: USA

Contact Voice Telephone: 207 624-7700
Contact Facsimile Telephone: 207 287-4563
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