Metadata

Coordinate System and Projection Information:

Zone: Michigan South
POSC CODE: 26990
Geographic Coordinate System: GCS North American 1983
Datum: North American 1983
Spheroid: GRS 1980
Prime Meridian: Greenwich (0)
Projection: Lambert Conformal Conic
Unit: US Foot (0.3048006096012192 meter)
1st Std. Parallel: 42.1
2nd Std. Parallel: 43.66666666666666
Central Meridian: -84.36666666666666
Origin (Latitude): 41.5
False Easting (ft): 13123333.3333333
False Northing (m): 0

Berrien County, Michigan
Photogrammetric Base Mapping Specifications

2005 Orthophoto

Aerial Photography:
Acquired April, 2005
Black & White
Snow off ground
Leaves off trees
Sun angle > 30 degrees above horizon
Acquire photography @ scale of 1" = 800' (1:9600)
Company: Aerocon (Sunfield, Michigan)
Plane height of 4,800'

Digital Orthophotos:
Gray scale value from 0 to 255
Pixel resolution = 6 inch
Produced to meet or exceed National Mapping Accuracy Standards for 1":100' aerial photography. 

Spatial Information:
Projection: Lambert Conical Conformal (LAMBERT)
Coordinate System: U.S. State Plane (Michigan Southern Zone)
(1983, US Survey feet)
Datum: NAD83 (horizontal) NAVD88 (vertical)

1996 Orthophoto

Aerial Photography:
Acquired Spring, 1996
Black & White
Snow off ground
Leaves off trees
Sun angle > 30 degrees above horizon
Acquire photography @ scale of 1" = 2000' (1:24000)
Company: Woolpert, Inc. (Dayton, Ohio)
Plane height of 12,000'

Digital Orthophotos:
Gray scale value from 0 to 255
Pixel resolution = 1 foot
Horizontal accuracy: +/- 5 feet
Digital orthophoto tiles: 714 total coverage
Tile size: 5000' x 5000'
File format: Tiff, Class G
File size: 25 MB each tile
Total file storage: 18 gigabytes total coverage
Produced to meet or exceed National Mapping Accuracy Standards for 1":200' aerial photography.

Reduced Resolution Orthophotos:
These were created to allow areas of imagery to be accessed and displayed more rapidly at different scales. Reduced resolution datasets were created fro 2-foot, 4-foot, 8-foot, 16-foot, and 32-foot resolution.

Spatial Information:
Projection: Lambert Conical Conformal (LAMBERT)
Coordinate System: U.S. State Plane (Michigan Southern Zone)
(1983, US Survey feet)
Datum: NAD83 (horizontal) NAVD88 (vertical)