Skowhegan_2011

Identification Information

Citation Information

Originator	James W. Sewall
Publication Date	5/1/2011
Title	Skowhegan_2011
Geospatial Data Presentation Form	remote-sensing image
Online Linkage	http://www.maine.gov/geolib/wms.htm

Abstract

This OGC-compliant web mapping service (WMS) provides 2011 aerial orthophotos at a resolution of 1 foot for Skowhegan, Maine. Using the color aerial photography obtained for this project, Sewall created seamless geo-referenced orthomosaics with a 1-foot pixel resolution, cut to 5000' x 5000' grids in TIF/TFW format at 1ft pixel resolution. Deliverables were in Maine State Plane Coordinate System, NAD83 US foot projection, accuracy to be comparable to USGS topo quad ±50 feet.

Purpose

General mapping, planning, and other municipal uses.

Time Period of Content

Calendar Date	5/1/2011
Currentness Reference	publication date

Status

Progress	Complete
Maintenance and Update Frequency	Unknown

Bounding Coordinates

West Bounding Coordinate	-69.771126
East Bounding Coordinate	-69.576827
North Bounding Coordinate	44.834820
South Bounding Coordinate	44.682780

Keywords

Theme	imageryBaseMapsEarthCover (ISO Keyword Thesaurus)
Place	Maine, United States,Skowhegan (Maine GIS Thesaurus-Place)

Access Constraints

None

Use Constraints

None

Contact Organization

James W. Sewall

Native Data Set Environment

Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 3; ESRI ArcCatalog 9.3.1.4000

Vertical Positional Accuracy Report

Altitude 9000'; Utilizing airborne GPS (ABGPS) and Inertial Measurement Unit (IMU) technologies, the entire Town of Skowhegan, plus a 250' buffer, will be flown at a scale of 1"=1500

Process Description

Using the color aerial photography obtained for this project, Sewall will create seamless geo-referenced orthomosaics with a 1-foot pixel resolution, cut to 5000' x 5000' grids in TIF/TFW format at 1ft pixel resolution. Deliverables were in Maine State Plane Coordinate System, NAD83 US foot projection, accuracy to be comparable to USGS topo quad ±50 feet. Altitude 9000'; Utilizing airborne GPS (ABGPS) and Inertial Measurement Unit (IMU) technologies, Camera Zeiss Top15 analog, the entire Town of Skowhegan, plus a 250' buffer, will be flown at a scale of 1"=1500.

Process Description

The tif files provided by Sewall were used as the source for this OGC-compliant web mapping service (WMS). The tif files are resampled to create overview TIFs and those provided in a MapServer-based environment.

Process Date

11/1/2011

Contact Organization

Maine Office of GIS

Address Type

mailing address

Address

State House Station #174

City

Augusta

State or Province

Postal Code

04333

Country

USA

Contact Voice Telephone

207-624-7700

Contact Facsimile Telephone

207-287-3842

Direct Spatial Reference Method

Raster

Raster Object Type

Pixel

Vertical Count

Grid Coordinate System Name

Universal Transverse Mercator

UTM Zone Number

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

row and column

Abscissa Resolution

0.300000

Ordinate Resolution

0.300000

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

Contact Organization

Maine Office of GIS

Address Type

mailing address

Address

State House Station 174

City

Augusta

State or Province

Postal Code

04333

Contact Voice Telephone

207-624-7700

Contact Facsimile Telephone

207-287-3842

Resource Description

Downloadable Data

Transfer Size

74.125

Metadata Reference Information

Metadata Date

20111115

Metadata Contact

Contact Organization	Maine Office of GIS
Address Type	mailing address
Address	SHS 174
City	Augusta
State or Province	ME
Postal Code	04333
Contact Voice Telephone	207-624-9487
Contact Facsimile Telephone	207-287-3842

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