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U.S. DEPARTMENT OF THE INTERIOR

BUREAU OF LAND MANAGEMENT

Oregon / Washington

GIS Metadata


BLM OR Aerial Photography Centers Point
FGDC Metadata
Show Definitions
Description | Spatial | Data Structure | Data Quality | Data Source | Data Distribution | Metadata
Description
Citation
Information used to reference the data.
Title: BLM OR Aerial Photography Centers Point
Originators: Bureau of Land Management, Oregon State Office
Publication date: 20100101
Data type: vector digital data
Description
A characterization of the data, including its intended use and limitations.
Abstract:
ap_centers_point: This point dataset depicts the centers of the photo frames for aerial photography taken over BLM Lands in the states of Oregon and Washington. This data is subject to update at a future point.
Purpose:
This feature class is intended to facilitate the location and identification of BLM aerial imagery in Oregon and Washington for release to BLM district personnel, other agencies and the general public. This theme can be used to search and display photo locations as well as for the creation of flight index maps.
Point Of Contact
Contact information for the individual or organization that is knowledgeable about the data.
Organization: Bureau of Land Management
Person: Corey Plank
Position: Lead Cartographer
Phone: (503) 808-6145
Email: cplank@blm.gov
Address type: mailing
Address:
P.O. Box 2965
City: Portland
State or Province: OR
Postal code: 97204
County: US
Data Type
How the data are represented, formatted and maintained by the data producing organization.
Data type: vector digital data
Native dataset environment: Microsoft Windows 2000 Version 5.2 (Build 3790) Service Pack 2; ESRI ArcCatalog 9.3.1.1850
Time Period of Data
Time period(s) for which the data corresponds to the currentness reference.
Beginning date: 19540701
Ending date: 20130831
Currentness reference:
publication date
Status
The state of and maintenance information for the data.
Data status: Complete
Update frequency: As needed
Key Words
Words or phrases that summarize certain aspects of the data.
Theme:
Keywords: Management
Keyword thesaurus: BLM-Theme
Theme:
Keywords: Aerial Photography, Land Use Planning, Centers, Photogrametry
Keyword thesaurus: None
Theme:
Keywords: imageryBaseMapsEarthCover
Keyword thesaurus: ISO 19115
Theme:
Keywords: planningCadastre, imageryBaseMapsEarthCover
Keyword thesaurus: ISO 19115 Topic Categories
Place:
Keywords: Washington, Oregon
Keyword thesaurus: BLM-State
Data Access Constraints
Restrictions and legal prerequisites for accessing or using the data after access is granted.
Access constraints:
PUBLIC DATA: None, these data are considered public domain.
Use constraints:
These data are provided by Bureau of Land Management (BLM) "as is" and may contain errors or omissions. The User assumes the entire risk associated with its use of these data and bears all responsibility in determining whether these data are fit for the User's intended use. The information contained in these data is dynamic and may change over time. The data are not better than the original sources from which they were derived, and both scale and accuracy may vary across the data set. These data may not have the accuracy, resolution, completeness, timeliness, or other characteristics appropriate for applications that potential users of the data may contemplate. The User is encouraged to carefully consider the content of the metadata file associated with these data. These data are neither legal documents nor land surveys, and must not be used as such. Official records may be referenced at most BLM offices. Please report any errors in the data to the BLM office for which it was obtained. The BLM should be cited as the data source in any products derived from these data. Any Users wishing to modify the data should describe the types of modifications they have performed. The User should not misrepresent the data, nor imply that changes made were approved or endorsed by BLM. This information may be updated without notification.
Cross Reference
Information about other, related data sets that are likely to be of interest.
Title: BLM OR Aerial Photography Flightlines Line
Originators: Bureau of Land Management, Oregon State Office
Publication date: 20100101
Cross Reference
Information about other, related data sets that are likely to be of interest.
Title: BLM OR Aerial Photography Boundaries Polygon
Originators: Bureau of Land Management, Oregon State Office
Publication date: 20100101
Spatial Reference Information
Spatial Domain
The geographic areal domain of the data that describes the western, eastern, northern, and southern geographic limits of data coverage.
Bounding Coordinates
In Unprojected coordinates (geographic)
Boundary Coordinate
West -125 (latitude)
East -116 (latitude)
North 49.5 (longitude)
South 41.5 (longitude)
Data Structure and Attribute Information
Overview
Summary of the information content of the data, including other references to complete descriptions of entity types, attributes, and attribute values for the data.
Entity and attribute detailed citation:
Individual photo centers are in a point feature class, created from digital files.  

Since 2001, contractors have collected GPS photo centers at the instant of exposure and provided them in digital form.  Where GPS obtained photo centers were not available, BLM scanned mylar or paper indexes and registered them to a projection before digitizing the photo centers.  In some cases, BLM digitized every fifth photo center and allowed a software program to interpolate the positions of the photo centers in between.  Those photo points are identified as "I" in the "Type" field of the attributes.

Although BLM cannot verify, in each individual case, how historical indexes were made, it is presumed that the contractor who flew the photography identified the photo center positions and marked them on a mylar or paper map.
Direct spatial reference method: Vector
Attributes of AP_Centers_Point
Detailed descriptions of entity type, attributes, and attribute values for the data.
Attributes
OBJECTID
Definition:
Internal feature number.
Attribute values: Sequential unique whole numbers that are automatically generated.
Attribute definition source:
ESRI
Shape
Definition:
Feature geometry.
Attribute values: Coordinates defining the features.
Attribute definition source:
ESRI
Roll
Definition:
Number assigned to the film roll.
Attribute definition source:
BLM
Flight
Definition:
The number assigned to the flight line.  Historically, R was used for reflights, G was used for Gap flights.  Flightline segments, after 1998, were numbered with decimals (14.0, 14.1, 14.2, etc.).
Attribute definition source:
BLM
Exposure
Definition:
Number assigned to each frame of photos.
Attribute definition source:
BLM
Sub_Exposure
Definition:
Letters assigned to each frame of photos in addition to numbers.
Attribute definition source:
BLM
Type
Definition:
Letter code generated automatically by the interpolation script:  M = manual, S = start, E = end, and I = interpolated.
Attribute domain values
Value Definition
S
Start Point
Definition Source:
BLM
E
End Point
M
Digitized Middle Point
I
Interpolated Point
Attribute definition source:
BLM
LabelPC
Definition:
Compilation of Roll, Flight, Exposure, and Sub_Exposure
Attribute definition source:
BLM
PhotoDate
Definition:
Date photos within a flight line were flown, if available.
Attribute definition source:
BLM
PhotoTime
Definition:
Time (Pacific Standard) photos were taken within a flight line, if available.  In the case of more recent projects, the time recorded is the time the flight line was completed.  For instance, the flight starts at 12:51 and ends at 12:43, then 12:51 is recorded as the PhotoTime.
Attribute definition source:
BLM
Proj_name
Definition:
Project code used as a unique identifier.
Attribute definition source:
BLM
District
Definition:
BLM District project is located within.
Attribute definition source:
BLM
Quad_Name
Definition:
USGS Quadrangle Name
Attribute definition source:
BLM
Resource_Area
Definition:
BLM Resource Management Area Name
Attribute definition source:
BLM
Rec_site
Definition:
Recreation Site name 
Attribute definition source:
BLM
Photo_Location
Definition:
Scanned image path and name
Attribute definition source:
BLM
POINT_X
POINT_Y
SDTS Feature Description
Description of point and vector spatial objects in the data using the Spatial Data Transfer Standards (SDTS) terminology.
Spatial data transfer standard (SDTS) terms
Feature class
Type: Entity point
Count: 354112
Feature class
Type: Entity point
Count: 354112
Data Quality and Accuracy Information
Positional Accuracy
Accuracy of the positional aspects of the data.
Horizontal accuracy report:
90% of the centerpoints are within 400 feet of their actual position.
Horizontal positional accuracy assessment:
Accuracy values
(value unknown)
Explanation:
Based on an estimate of the amount of error expected in eyeballing and digitizing.
Vertical accuracy report:
Not applicable.
Data Source and Process Information
Process Steps
Information about events, parameters, tolerances and techniques applied to construct or derive the data.
Process step information
Process Step 1
Process description:
Corrected photo location information and added additional points
Organization: BLM Oregon State Office
Person: Corey Plank
Position: Lead Cartographer
Phone: 503-808-6145
Fax: 503-808-6190
Email: cplank@blm.gov
Address type: mailing
Address:
PO Box 2965
City: Portland
State or Province: OR
Postal code: 97208-2965
County: US
Process date: not complete
Process Step 2
Process description:
This point data was captured by the contractor who flew the project area, or by BLM Oregon/Washington State Office employees. The photos were examined and a centerpoint of each frame was located on a mylar or paper map. The map is used as an index to the project. A BLM employee scanned the index map at 300 dots per inch and then geo-registered the scanned index. The employee digitized the photocenter points in ArcMap, sometimes every point and sometimes every fifth point. The Type attribute indicates whether the point was individually located or located by a script that interpolated points in between the fifth points. The feature class has two attribute fields indicating which point locations were interpolated.
Organization: Bureau of Land Management
Person: Susan Nelson
Position: Cartographer/Remote Sensing Acquisition
Phone: (503) 808-6139
Email: s1nelson@blm.gov
Address type: mailing
Address:
P.O. Box 2965
City: Portland
State or Province: OR
Postal code: 97204
County: US
Process date: unknown
Data Source used
Scanned Lat Lon
Process Step 3
Process description:
Individual project data were aggregated into this feature class. Field names were standardized (given common names). Data was projected to GCS North American 1983 Datum.
Organization: Bureau of Land Management, Oregon State Office
Person: Eric Hiebenthal
Position: GIS Data Management Specialist
Phone: 503-808-6565
Fax: 503-808-6419
Email: ehiebent@blm.gov
Address type: mailing
Address:
P.O. Box 2965
City: Portland
State or Province: OR
Postal code: 97208
County: US
Process date: 20120423
Process Step 4
Process description:
Inclusion of points from the recent imagery over the Douglas Complex and Big Windy Fires.
Organization: Bureau of Land Management
Person: Corey Plank
Position: Lead Cartographer
Phone: (503) 808-6340
Email: cplank@blm.gov
Address type: mailing
Address:
P.O. Box 2965
City: Portland
State or Province: OR
Postal code: 97208
County: US
Process date: 20130925
Data Distribution Information
General
Description of the data known by the party from whom the data may be obtained, liability of party distributing data, and technical capabilities required to use the data.
Resource description:
Downloadable Data
Distribution liability:
The BLM assumes no responsibility for errors or omissions. No warranty is made by the BLM as to the accuracy, reliability, or completeness of these data for individual use or aggregate use with other data; nor shall the act of distribution to contractors, partners, or beyond, constitute any such warranty for individual or aggregate data use with other data. Although these data have been processed successfully on computers of BLM, no warranty, expressed or implied, is made by BLM regarding the use of these data on any other system, or for general or scientific purposes, nor does the fact of distribution constitute or imply any such warranty. In no event shall the BLM have any liability whatsoever for payment of any consequential, incidental, indirect, special, or tort damages of any kind, including, but not limited to, any loss of profits arising out of the use or reliance on the geographic data or arising out of the delivery, installation, operation, or support by BLM.
Distribution Point of Contact
Contact information for the individual or organization distributing the data.
Organization: Bureau of Land Management, Oregon State Office
Person: Eric Hiebenthal
Position: GIS Data Management Specialist
Phone: 503-808-6565
Fax: 503-808-6419
Email: ehiebent@blm.gov
Address type: mailing
Address:
P.O. Box 2965
City: Portland
State or Province: OR
Postal code: 97208
County: US
Metadata Reference
Metadata Date
Dates associated with creating, updating and reviewing the metadata.
Last updated: 20120503
Last metadata review date: 20131021
Metadata Point of Contact
Contact information for the individual or organization responsible for the metadata information.
Organization: Bureau of Land Management, Oregon State Office
Person: Roger Mills
Position: GIS Spec
Phone: (503) 808-6340
Fax: (503) 808-6419
Email: r2mills@blm.gov
Address type: mailing
Address:
P.O. Box 2965
City: Portland
State or Province: OR
Postal code: 97208
County: US
Metadata Security Information
Handling restrictions imposed on the metadata because of national security, privacy or other concerns.
Security classifiction system: Not Classified
Metadata Standards
Description of the metadata standard used to document the data and reference to any additional extended profiles to the standard used by the metadata producer.
Standard name: FGDC Content Standard for Digital Geospatial Metadata
Standard version: FGDC-STD-001-1998
Time convention: local time
FGDC Plus Metadata Stylesheet
Stylesheet: FGDC Plus Stylesheet
File name: FGDC Plus.xsl
Version: 2.0
Description: This metadata is displayed using the FGDC Plus Stylesheet, which is an XSL template that can be used with ArcGIS software to display metadata. It displays metadata elements defined in the Content Standard for Digital Geospatial Metadata (CSDGM) - aka FGDC Standard, the ESRI Profile of CSDGM, the Biological Data Profile of CSDGM, and the Shoreline Data Profile of CSDGM. CSDGM is the US Federal Metadata standard. The Federal Geographic Data Committee originally adopted the CSDGM in 1994 and revised it in 1998. According to Executive Order 12096 all Federal agencies are ordered to use this standard to document geospatial data created as of January, 1995. The standard is often referred to as the FGDC Metadata Standard and has been implemented beyond the federal level with State and local governments adopting the metadata standard as well. The Biological Data Profile broadens the application of the CSDGM so that it is more easily applied to biological data that are not explicitly geographic (laboratory results, field notes, specimen collections, research reports) but can be associated with a geographic location. Includes taxonomical vocabulary. The Shoreline Data Profile addresses variability in the definition and mapping of shorelines by providing a standardized set of terms and data elements required to support metadata for shoreline and coastal data sets. The FGDC Plus Stylesheet includes the Dublin Core Metadata Element Set. It supports W3C DOM compatible browsers such as IE7, IE6, Netscape 7, and Mozilla Firefox. It is in the public domain and may be freely used, modified, and redistributed. It is provided "AS-IS" without warranty or technical support.
Instructions: On the top of the page, click on the title of the dataset to toggle opening and closing of all metadata content sections or click section links listed horizontally below the title to open individual sections. Click on a section name (e.g. Description) to open and close section content. Within a section, click on a item name (Status, Key Words, etc.) to open and close individual content items. By default, the Citation information within the Description section is always open for display.
Download: FGDC Plus Stylesheet is available from the ArcScripts downloads at www.esri.com.