Identification_Information:
Citation:
Citation_Information:
Originator: USDA-FSA Aerial Photography Field Office
Publication_Date: 20050915
Title: naip_1-1_2n_s_ms049_2005_1.sid
Publication_Information:
Publication_Place: Salt Lake City, Utah
Publisher: USDA FSA Aerial Photography Field Office
Description:
Abstract:
This data set contains imagery from the National Agriculture
Imagery Program (NAIP). NAIP acquires digital ortho imagery
during the agricultural growing seasons in the continental U.S..
A primary goal of the NAIP program is to enable availability of
ortho imagery within one year of acquisition. NAIP provides two
main products: 1 meter ground sample distance (GSD) ortho
imagery rectified to a horizontal accuracy of within +/- 3
meters of reference digital ortho quarter quads (DOQQ's) from
the National Digital Ortho Program (NDOP); and, 2 meter GSD
ortho imagery rectified to within +/- 10 meters of reference
DOQQs. The tiling format of NAIP imagery is based on a 3.75'
x 3.75' quarter quadrangle with a 300 meter buffer on all four
sides. NAIP quarter quads are formatted to the UTM coordinate
system using NAD83. NAIP imagery may contain as much as 10%
cloud cover per tile.
This file was generated by compressing NAIP quarter quadrangle
tiles that cover a county. MrSID compression, with mosaic
option, was used. Target values for the compression ratio
are (15:1) and the maximum compression zoom levels are used.
Purpose:
NAIP imagery may be distributed on an interim basis to meet
USDA program requirements. The interim product is a
compressed county mosaic. Users should be aware that the
interim compressed county mosaic may contain defects and
have horizontal accuracy less than the specified tolerances.
Defective imagery may be replaced within one year of image
acquisition date.
Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 2005
Currentness_Reference: Majority years of Photography Dates.
Status:
Progress: Complete
Maintenance_and_Update_Frequency: Irregular
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -90.75309503
East_Bounding_Coordinate: -89.99695396
North_Bounding_Coordinate: 32.629053
South_Bounding_Coordinate: 31.99586403
Keywords:
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: Digital Georectfied Image
Theme_Keyword: Mosaic
Theme_Keyword: Georeferenced Image
Theme_Keyword: Quarter Quadrangle Centered
Theme_Keyword: Georectification
Theme_Keyword: compression
Theme_Keyword: MrSID
Theme_Keyword: NAIP
Theme_Keyword: Compliance
Theme_Keyword: Aerial Compliance
Theme_Keyword: Farming
Place:
Place_Keyword_Thesaurus: Geographic Names Information System
Place_Keyword: MS
Place_Keyword: Hinds
Place_Keyword: Hinds Co MS FSA
Place_Keyword: 28049
Access_Constraints: None
Use_Constraints: None, The Originator asks to be credited in derived products.
Point_of_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: USDA-FSA Aerial Photography Field Office
Contact_Address:
Address_Type: mailing and physical address
Address: 2222 West 2300 South
City: Salt Lake City
State_or_Province: Utah
Postal_Code: 84119-2020
Country: USA
Contact_Voice_Telephone: 801-975-3500
Contact_Facsimile_Telephone: 801-975-3529
Browse_Graphic:
Browse_Graphic_File_Name: None
Browse_Graphic_File_Description: None
Browse_Graphic_File_Type: None
Native_Data_Set_Environment: MrSID Geo Express version 3.0
Data_Quality_Information:
Logical_Consistency_Report: None
Completeness_Report: None
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report: FSA Digital Orthophoto Specs.
Vertical_Positional_Accuracy:
Vertical_Positional_Accuracy_Report: N/A 2d only
Lineage:
Source_Information:
Source_Citation:
Citation_Information:
Originator: Aerial Photography Field Office
Publication_Date: 20050915
Title: Hinds MS
Source_Scale_Denominator: 40000
Type_of_Source_Media: CD
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 2005
Source_Currentness_Reference: Majority Aerial Photography Date
Source_Citation_Abbreviation: MrSID compressed image
Source_Contribution: Mosaicked County Image
Process_Step:
Process_Description:
Minify (resample) 1 band per flight line and ascertain the viability
of the images for full processing. Describe cloud cover, cloud
shadow, haze or other flaws. Record the row and sample coordinates
associated with each flaw for subsequent tracking.
POS data records the position of the aircraft in space, taking into
account any turbulence or similar motion effects. POS processing
takes this positional data and reconciles it to the raw image data,
thereby geo-referencing the imagery and effectively transforming it
from a “picture” to a crude map. This step results in L0 imagery.
The horizontal accuracy of the orthorectified imagery is
primarily determined by the quality of the airborne GPS, Inertial
Measurement Unit (IMU) data and the surface model (digital elevation
model or DEM).
Rectify the Level0 imagery for the Pan-A sensor bands to an
intermediate planar elevation. Rectification adjusts the imagery to
account for known, optical characteristics that are inherent to the
sensor platform.
Automatic Point Matching processing operates against the fully
minified Level-1 images. APM uses intelligent, optical pixel
matching routines to detect common image points across pairs of
overlapping images, including the forward, nadir and backward
looking sensors, as well as adjacent image strips. APM processing
derives a list of probable, matched points, and writes them out as
terrain points in a supporting file to be used in subsequent ORIMA
processing.
ORIMA orientation Management processing is a fundamental component of
photogrammetric processing for traditional, film-based frame aerial
photography. The ORIMA software modifies and updates the processing
for use in the context of line scanner digital imagery. ORIMA
processing uses the terrain point data that was generated under APM
to calculate image shift based upon fundamental principles of
triangulation.
Orthorectify images which means that the imagery is reconciled
against a Digital Terrain Model (DTM); The DTM model used is the
National elevation data set. The imagery will be adjusted to reflect
terrain variations, and its horizontal geo-referencing is highly
accurate.
Perform thorough Quality Assessment of all Level-2 GeoTIFF images.
Quantify horizontal accuracy at established, quarantined locations
by comparing Level-2 coordinates to stereo pairs. Check all images
for DTM (Digital Terrain Model) anomalies and DTM dropout. Record
the coordinates associated with each error for subsequent tracking.
Color balancing is performed to compensate for natural, east/west
lighting variations in the imagery and daily lighting and humidity
variances. A graduated adjustment of the brightness and contrast
within the RGB spectrum
using mosaicing software. Mosaicing software also corrects for
slight horizontal discrepancies between adjacent flight line images,
and performs automated adjustments to reduce visibility of seams.
DOQQs are color and radiometrically balanced over a block consisting
of a large number of images. A sample of DOQQs is selected and
inspected for relative horizontal accuracy with the USDA furnished
DOQQs. Completed and approved DOQQs are assembled into a countywide
MrSID file, using a compression factor of 1:15.
Process_Date: 20050915
Spatial_Data_Organization_Information:
Indirect_Spatial_Reference: Hinds MS
Direct_Spatial_Reference_Method: Raster
Raster_Object_Information:
Raster_Object_Type: Pixel
Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Planar:
Grid_Coordinate_System:
Grid_Coordinate_System_Name: Universal Transverse Mercator
Universal_Transverse_Mercator:
UTM_Zone_Number: 15
Transverse_Mercator:
Scale_Factor_at_Central_Meridian: 0.9996
Longitude_of_Central_Meridian: -93
Latitude_of_Projection_Origin: 0.0
False_Easting: 500000
False_Northing: 0.0
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: row and column
Coordinate_Representation:
Abscissa_Resolution: 2.000000
Ordinate_Resolution: 2.000000
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
Entity_and_Attribute_Information:
Overview_Description:
Entity_and_Attribute_Overview: 24-bit pixels, 3 band color (RGB) represent brightness values 0 - 255
Entity_and_Attribute_Detail_Citation: None
Distribution_Information:
Distributor:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Supervisor Sales Services Branch
Contact_Organization: USDA-FSA Aerial Photography Field Office
Contact_Address:
Address_Type: mailing and physical address
Address: 2222 West 2300 South
City: Salt Lake City
State_or_Province: Utah
Postal_Code: 84119-2020
Country: USA
Contact_Voice_Telephone: 801-975-3500
Contact_Facsimile_Telephone: 801-975-3529
Resource_Description: Mosaicked County Image for Hinds MS
Distribution_Liability:
In no event shall the creators, custodians, or distributors of this
information be liable for any damages arising out of its use
(or the inability to use it).
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: Compressed County Mosaic
Format_Information_Content: Natural Color
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name: None
Offline_Option:
Offline_Media: CD-ROM
Recording_Format: ISO 9660
Fees: Contact the Aerial Photography Field Office for more information
Metadata_Reference_Information:
Metadata_Date: 20050915
Metadata_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: USDA-FSA Aerial Photography Field Office
Contact_Address:
Address_Type: mailing and physical address
Address: 2222 West 2300 South
City: Salt Lake City
State_or_Province: Utah
Postal_Code: 84119-2020
Country: USA
Contact_Voice_Telephone: 801-975-3500
Metadata_Standard_Name: Content Standard for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998