USDA-FSA Aerial Photography Field Office
20131125
ortho_1-1_1n_al001_2013_1
Version
vector digital data
Salt Lake City, Utah
USDA-FSA Aerial Photography Field Office
This data set contains polygons delineating the seamline
boundaries of imagery acquired as part of the
National Agriculture Imagery Program (NAIP), and used in
the creation of DOQQs and compressed county mosaics
(CCM). These seam polygons can be used as a
tool in determining the image source and date of each
portion of the DOQQ or the CCM. The NAIP acquires
4 band digital ortho imagery from airborne and/or space
based platforms during the agricultural growing seasons
in the U.S.. A primary goal of the NAIP program is to enable
availability of ortho imagery within sixty days of acquisition.
The NAIP provides 1 meter GSD ortho imagery rectified
within +/- 6 meters to true ground at a 95% confidence level.
The tiling format of NAIP imagery is based on a 3.75' x 3.75'
quarter quadrangle with a 300 (plus or minus 30) pixel buffer
on all four sides. The NAIP quarter quads are formatted to
the UTM coordinate system using the North American Datum
of 1983 (NAD83).
This index aids USDA Agencies in identifying
source acquisition date boundaries for the
compressed county mosaic as they administer
USDA programs for their customers.
2013
ESRI shapefile creation date.
Irregular
-87.012309
-86.303507
33.525686
31.778423
None
farming
Digital
Mosaic
ortho imagery
United States Department of Agriculture (USDA)
Acquisition Date
None
USA
FSA
Field Service Center
Aerial Photography Field Office
APFO
USDA
United State Department of Agriculture (USDA)
AUTAUGA, AL
FIPS 01001
AUTAUGA
AL
None
None, The USDA-FSA Aerial Photography Field Office asks
to be credited in derived products.
USDA-FSA Aerial Photography Field Office
mailing and physical
2222 West 2300 South
Salt Lake City
Utah
84119-2020
801-844-2922
801-956-3653
apfo.sales@slc.usda.gov
Version 6.1 (Build 7600) ; ESRI ArcCatalog 9.2.6.1500
All data have been reviewed for correct application of
attributes and are accurate to current conditions.
USDA-FSA Aerial Photography Field Office relies on the
integrity of the original data collection which was
performed by private contractors. Data integrity was
validated by the responsible private contractor or
sub-contractor. Polygon and chain-node topology present.
There are no duplicate arcs and no dangling nodes.
The data set contains polygons that do not overlap,
there are no polygons that are entered twice, and all
areas are completely described. The area features are
topologically structured with nodes at all intersections.
The dataset is comprised of polygons delineating portions
of each exposure used as source data for each part of the
NAIP imagery, with no gaps in coverage. Attribution includes
acquisition dates and times.
To the best knowledge of the USDA-FSA Aerial Photography
Field Office this digital data set is complete with no
required elements left unrepresented according to
contract specifications.
None
USDA-FSA Aerial Photography Field Office
20131125
Index of source acquisition dates.
Vector Digital Data
12000
External media types
2013
Date when Vector Digital Data was prepared.
NAIP
Collection date of source image data.
The seamline polygon shapefile was created using OrthoVista and ArcGIS 9.2.
The vector delineating the seamline areas was exported from Orthovista in
dxf format. The .dxf was imported into an ESRI file Geodatabase as a polygon
feature class. A topology layer was created and validated to check for
overlapping polygons, gaps between polygons, and dangling nodes. Dissolving
into the largest neighbor polygon eliminated any polygons less than 40,470
square meters.
The flight line footprint shapefiles were attributed with the required items
and joined to the corresponding seamline polygons. Polygons covering the county
area were selected and output to the final shapefile.
withheld
20131125
None
Vector
Simple
FALSE
0
TRUE
FALSE
coordinate pair
0.000064
0.000064
meters
North American Datum of 1983
Geodetic Reference System 80
6378137.000000
298.257222
ortho_1-1_1n_al001_2013_1
The dBASE file that stores the attribute information of
features. When a shapefile is added as a theme to a view
in GIS software, this file is displayed as a feature table.
ESRI OnLine Help
Feature Class
0
objectid
objectid
OID
4
10
0
Internal feature number.
Esri
Sequential unique whole numbers that are automatically generated.
Shape
Feature geometry.
ESRI
Coordinates defining the features.
shape
Geometry
8
0
0
IDATE
Imagery date defined by seam polygon
USDA-FSA Aerial Photography Field Office
Acquisition dates for source imagery.
Calendar dates. YYYY-MM-DD
idate
String
10
0
0
st_area(shape)
st_area(shape)
Double
0
0
0
st_perimeter(shape)
st_perimeter(shape)
Double
0
0
0
Entity Name Type Length
---------------- -------- ------
OID ObjectID 4
Shape Polygon
ID String 6
IDATE Date 10
SDATE String 16
EDATE String 16
BCON String 3
CAM_TYPE String 20
CAM_MAN String 50
CAM_MOD String 25
HARD_FIRM String 50
SENSNUM String 50
AC_TYPE String 50
ACTAILNUM String 10
Shape_Area Double 19
USDA-FSA Aerial Photography Field Office Contract Specifications.
Downloadable Data
0.920
20131125
USDA-FSA Aerial Photography Field Office
REQUIRED: The person responsible for the metadata information.
mailing address
2222 West 2300 South
Salt Lake City
Utah
84119-2020
801-844-2922
apfo.sales@slc.usda.gov
FGDC Content Standards for Digital Geospatial Metadata
FGDC-STD-001-1998
local time
None
Unclassified
None
http://www.esri.com/metadata/esriprof80.html
ESRI Metadata Profile
http://www.esri.com/metadata/esriprof80.html
ESRI Metadata Profile
Esri ArcGIS 13.1.2.41833
AQD_2013_AL
AQD_2013_AL
002
0.000
Projected
GCS_WGS_1984
Linear Unit: Meter (1.000000)
WGS_1984_Web_Mercator_Auxiliary_Sphere
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FALSE
Enterprise Geodatabase Feature Class
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dataset
EPSG
6.18.3(9.3.1.2)
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