Metadata for 2009 Montana International Boundary Air Photo Index Metadata for 2009 Montana International Boundary Air Photo Index

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Identification Information:

Citation:

Originator: 3001, Inc.
Publication date: 08/04/2010
Title: 2009 Montana International Boundary Air Photo Index
Online linkage: https://ftpgeoinfo.msl.mt.gov/Data/Spatial/NonMSDI/Shapefiles/Orthophoto_Index_Border_2009.zip

Browse graphic file name: http://docs.msl.mt.gov/geoinfo/images/metadata/dop_2009_border.jpg

Abstract:

This is an index to the orthorectified, one-foot resolution aerial photos, taken in the year 2009, of the United States-Canada International Boundary provided to the Montana State Library by the U.S. Geological Survey. The images cover an area extending 30 miles south and 10 miles north of the border, and the collection available from the State Library extends from 4 miles west of the Washington-Idaho boundary to Kenmare, North Dakota, about 90 miles east of the Montana-North Dakota boundary.

Each polygon in the data set represents the region covered by one image, and the filename field gives the name of the image file. The image dates are also provided. There are 32705 images in the collection, and each image covers a square region 1500 meters wide.

The image file names are based on the U.S. National Grid coordinate of the southwest corner of the images. We believe 98 of the files have incorrect names, and this discrepancy is noted in the attribute table.

Purpose:

The purpose of this index is to allow users to locate the files they need to cover their area of interest.

The purpose of the image collection is to provide geographic reference for federal, state, and local emergency responders and for homeland security efforts.

Time period of content:

Beginning date: 05/15/2009
Ending date: 07/15/2009
Currentness reference: ground condition

Access constraints: None

Use constraints:

The Montana State Library provides this product/service for informational purposes only. The Library did not produce it for, nor is it suitable for legal, engineering, or surveying purposes. Consumers of this information should review or consult the primary data and information sources to ascertain the viability of the information for their purposes. The Library provides these data in good faith but does not represent or warrant its accuracy, adequacy, or completeness. In no event shall the Library be liable for any incorrect results or analysis; any direct, indirect, special, or consequential damages to any party; or any lost profits arising out of or in connection with the use or the inability to use the data or the services provided. The Library makes these data and services available as a convenience to the public, and for no other purpose. The Library reserves the right to change or revise published data and/or services at any time.

Point of contact:

Montana State Library
PO Box 201800
Helena, Montana 59620-1800
Telephone: 406-444-5354
TDD/TTY telephone: Montana Relay 711
Fax: 406-444-0266
E-Mail: geoinfo@mt.gov

Data Quality Information:

Lineage:

Source information:

Originator: 3001, Inc
Publication date: Unpublished Material
Title: Original image indexes
Source contribution:: The data was provided in 8 regional folders, each with a shapefile index of the images in the folder. These were the source of the polygon boundaries and the following attribute fields: X_coord, Y_Coord, USNGID, IMG_Date, State, and NHA_ID

Source information:

Originator: 3001, Inc.
Publication date: Unpublished Material
Title: Image metadata files
Source contribution:: Each regional folder provided to the State Library had a collection of xml metadata files that appear to have a one-to-one relationship with the images. The Full_Date column of the attribute table was populated from the Calendar Date field of the Time Period of Content section of these metadata files.

Process step:

Merge the regional image index files while projecting them from their appropriate UTM coordinate system to Montana State Plane Coordinates.

Process date: 08/04/2010

Process contact:

Gerry Daumiller
Montana State Library
Telephone: 406-444-5358
E-Mail: gdaumiller@mt.gov

Process step:

Extract the Time Period of Content calendar date from the metadata files and join them to the attribute table based on the metadata file names and the USNGID item from the shapefile.


Process date: 08/04/2010

Process step:

Change the file names of 98 polygons whose USNGID values did not match up with any metadata file name. It appears that all of these images, which are in Hill, Blaine, and Phillips Counties and have an y-coord of 5400000 and an x-coord between 574500 and 720000, mistakenly have a "U" as the 5th character of their file names, when they should have a "V", if the file name were to correctly represent its U.S. National Grid Address.


Process date: 08/04/2010

Spatial Data Organization Information:

Point and vector object information:

SDTS object type: G-polygon

SDTS object count: 32705

Spatial Reference Information:

Horizontal coordinate system definition:

Grid coordinate system name: State Plane Coordinate System 1983

SPCS zone identifier: 2500

Lambert conformal conic:

Standard parallel: 45
Standard parallel: 49
Longitude of central meridian: -109.5
Latitude of projection origin: 44.25
False easting: 600000.00000
False northing: 0.00000

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:

Entity type label: Orthophoto_Index_Border_2009.dbf

Attribute label: FID

Attribute definition: Shapefile sequence number

Attribute label: Shape

Attribute definition: Feature geometry

Attribute label: X_COORD

Attribute definition: UTM X-coordinate of the image southwest corner

Attribute label: Y_COORD

Attribute definition: UTM Y-coordinate of the image southwest corner

Attribute label: USNGID

Attribute definition: U.S. National Grid address of the image southwest corner

Attribute label: IMG_DATE

Attribute definition: Month and year the image was taken

Attribute label: STATE

Attribute definition:: U.S. State the image is in. This is blank if the image is in Canada.

Attribute label: NGA_ID

Attribute definition:: The numeric part of this field is the name of the folder the image is in at the State Library.

Attribute label: Full_Date

Attribute definition:: Image date obtained from metadata file believed to be associated with the image.

Attribute label: Name_Error

Attribute definition:: Flag for images whose names are believed to not match their USNGID values.

Attribute label: File_Name

Attribute definition: Name of the image file believed to cover the polygon.

Distribution Information:

Distributor:

Montana State Library
PO Box 201800
Helena, Montana 59620-1800
Telephone: 406-444-5354
Telephone: 406-444-5354
TDD/TTY telephone: Montana Relay 711
Fax: 406-444-0266
E-Mail: geoinfo@mt.gov
E-Mail: geoinfo@mt.gov

Resource description: Downloadable data

Distribution liability:

Standard order process:

Digital form:

Metadata Reference Information:

Metadata date: 08/05/2010

Metadata contact:

Montana State Library
P.O. Box 201800
Helena, Montana 59620-1800
Telephone: 406-444-5354
TDD/TTY telephone: Montana Relay 711
Fax: 406-444-0266
E-Mail: geoinfo@mt.gov