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Low_Tide_2010
Identification Information
Citation Information
Originator
Sewall Company
Publication Date
20100901
Publication Time
Unknown
Title
Low_Tide_2010
Edition
First
Geospatial Data Presentation Form
raster digital data
Online Linkage
http://www.maine.gov/geolib/wms.htm
Abstract
This is an image mosaic of true color imagery, 0.50 meter ground sample distance (GSD), high resolution digital orthophotographs produced from aerial photos collected over the coast of Maine in the summer of 2010. Each pixel represents a planimetric square 0.50 meter on a side on the ground. Aerial photography was flown at approximately 1,870 meters above mean ground level. Source elevation data were 30 meter Digital Elevation Models produced by the USGS from 1:24,000 scale elevation. The digital orthorectified images are referenced to North American Datum 1983, UTM Zone 19, expressed in units of meters. The completed orthorectified GeoTIFF files represent Digital Ortho Quarter Quad (DOQQ) sized sheets. Imagery tiles provide complete coverage of the Maine Department of Marine Resources (DMR) 2010 Eelgrass boundaries as defined by the Biddeford to Kittery project.
Purpose
To serve the Maine Department of Marine Resources (DMR), supplying 0.50 meter ground sample distance, map-accurate, continuous digital photographic coverage for the coast of Maine as identified in the Biddeford to Kittery Maine DMR project.
Time Period of Content
Beginning Date
20100814
Beginning Time
1214
Ending Date
20100814
Ending Time
1327
Currentness Reference
ground condition
Status
Progress
Complete
Maintenance and Update Frequency
Unknown
Bounding Coordinates
West Bounding Coordinate
-70.887289
East Bounding Coordinate
-70.302568
North Bounding Coordinate
43.469687
South Bounding Coordinate
43.028393
Keywords
Theme
Coast, low tide, Aerial Photography, Ortho-Rectified Digital Image, Eelgrass, Ocean, True Color Imagery, Vegetation, Ground Sample Distance 0.50 Meter (Maine GIS Thesaurus)
Place
Coast, Maine, United States (Maine GIS Thesaurus)
Access Constraints
Secondary distribution by permission only.
Use Constraints
Users must assume responsibility in determining the usability of this data for their purposes.
Contact Organization
Sewall Company
Contact Person
Nicole Cyr
Contact Position
Imaging Production Manager
Address Type
mailing address
Address
P.O. Box 433
City
Old Town
State or Province
ME
Postal Code
04468
Country
United States
Address Type
physical address
Address
136 Center St.
City
Old Town
State or Province
ME
Postal Code
04468
Country
United States
Contact Voice Telephone
207-827-4456 ext. 264
Contact Facsimile Telephone
207-827-3641
Contact Electronic Mail Address
nicole.cyr@sewall.com
Hours of Service
Monday through Friday 0800 - 1700 EST
Data Set Credit
Aerial photography and ortho-rectification performed by Sewall Company in Old Town, ME
Native Data Set Environment
Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 3; ESRI ArcCatalog 9.3.1.4000
Attribute Accuracy Report
Orthophotos were tonally balanced to produce a uniform contrast and tone across the image tiles of the entire project.
Logical Consistency Report
None
Completeness Report
Complete digital orthorectified image mosaics, covering the Eelgrass Maine DMR area (Biddeford to Kittery) for summer 2010.
Process Description
Aerial photography for the Maine Department of Marine Resources (DMR) was flown at approximately 1,870 meters above mean ground level. Imagery was captured using one camera (Camera serial number: 144126, focal length 153.325). True color aerial photography flown generally east-west and north-south, controlled by Airborne Global Positioning System (GPS) and Inertial Measurement Unit (IMU), was acquired and processed to a positive image over the Maine DMR 2010 Eelgrass Biddeford to Kittery project area. The photography was acquired only under conditions that minimized clouds and cloud shadows, smoke, haze, light streaks, snow, flooding, excessive soil moisture, during minimal shadow conditions, and with sun angle between 15 and 30 degrees to minimize sun glint. Imagery was captured during periods of low water turbidity as determined by Maine DMR. The film specified was Kodak 2427 true color original film, processed to a positive image. Adequate stereo coverage over the project area was required with a minimum overlap of 60 percent forward and 30 percent side to provide full stereoscopic coverage appropriate for the production of digital orthos.
Process Date
20100814
Contact Organization
Sewall Company
Address Type
mailing address
Address
P.O. Box 433
City
Old Town
State or Province
ME
Postal Code
04468
Country
United States
Address Type
physical address
Address
136 Center St.
City
Old Town
State or Province
ME
Postal Code
04468
Country
United States
Contact Voice Telephone
207-827-4456
Contact Facsimile Telephone
207-827-3641
Hours of Service
Monday through Friday 0800 - 1800 EST
Process Description
Imagery was ortho-rectified utilizing an elevation dataset created by the USGS with a 1 arc second resolution. The exterior orientations were obtained from the result of the Airborne Global Positioning System (GPS) and Inertial Measurement Unit (IMU). Imagery was processed to achieve a 0.50 meter ground sample distance (GSD).
Process Date
20100901
Contact Organization
Sewall Company
Contact Person
Nicole Cyr
Contact Position
Imaging Production Manager
Address Type
mailing address
Address
P.O. Box 433
City
Old Town
State or Province
ME
Postal Code
04468
Country
United States
Address Type
physical address
Address
136 Center St.
City
Old Town
State or Province
ME
Postal Code
04468
Country
United States
Contact Voice Telephone
207-827-4456 ext. 264
Contact Facsimile Telephone
207-827-3641
Contact Electronic Mail Address
Nicole.Cyr@sewall.com
Hours of Service
0800 - 1800 EST
Cloud Cover
5%
Direct Spatial Reference Method
Raster
Raster Object Type
Pixel
Row Count
Column Count
Grid Coordinate System Name
Universal Transverse Mercator
UTM Zone Number
19
Scale Factor at Central Meridian
0.999600
Longitude of Central Meridian
-69.000000
Latitude of Projection Origin
0.000000
False Easting
500000.000000
False Northing
0.000000
Planar Coordinate Encoding Method
coordinate pair
Abscissa Resolution
0.000100
Ordinate Resolution
0.000100
Planar Distance Units
meters
Horizontal Datum Name
North American Datum of 1983
Ellipsoid Name
Geodetic Reference System 80
Semi-major Axis
6378137.000000
Denominator of Flattening Ratio
298.257222
Altitude Resolution
1.000000
Altitude Encoding Method
Explicit elevation coordinate included with horizontal coordinates
Entity Type
Metadata Reference Information
Metadata Date
20101005
Metadata Contact
Contact Organization
Sewall Company
Contact Person
Nicole Cyr
Contact Position
Imaging Production Manager
Address Type
mailing address
Address
P.O. Box 433
City
Old Town
State or Province
ME
Postal Code
04468
Country
United States
Address Type
physical address
Address
136 Center St.
City
Old Town
State or Province
ME
Postal Code
04468
Country
United States
Contact Voice Telephone
207-827-4456 ext. 264
Contact Facsimile Telephone
207-827-3641
Hours of Service
Monday through Friday 0800 - 1800 EST
Metadata Standard Name
FGDC Content Standards for Digital Geospatial Metadata
Metadata Standard Version
FGDC-STD-001-1998
Metadata Time Convention
local time
Online Linkage
http://www.esri.com/metadata/esriprof80.html
Profile Name
ESRI Metadata Profile
[ModDate]
20101013
[ModTime]
08504900
[mdDateSt]
20101013
[Sync]
TRUE
Contact Organization
Maine Office of GIS
Address Type
mailing address
Address
State House Station #174
City
Augusta
State or Province
Maine
Postal Code
04333
Country
USA
Contact Voice Telephone
207-624-7700
Contact Facsimile Telephone
207-287-3842
Resource Description
OpenGIS (OGC) Web Map Service (WMS)
Distribution Liability
Users must assume responsibility to determine the usability of this data for their purposes.
Format Name
WMS
Format Version Number
1.1
Format Specification
OpenGIS (OGC) Web Map Service (WMS)
Network Resource Name
http://www.maine.gov/geolib/wms.htm
[accinstr]
The Maine Office of GIS and the GeoLibrary Board provide web mapping services to distribute aerial photos and other digital data. A WMS is not a web application which you can see in a web browser; rather, it requires you to add the service to a GIS software application.
Fees
None
Turnaround
Immediate
Technical Prerequisites
Requires you to add the service to a GIS software application.
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