. .

U.S. DEPARTMENT OF THE INTERIOR

BUREAU OF LAND MANAGEMENT

Oregon / Washington

GIS Metadata


BLM OR Aerial Photography Centers Point

Metadata:


Identification_Information:
Citation:
Citation_Information:
Originator: Bureau of Land Management, Oregon State Office
Publication_Date: 20100101
Title:
BLM OR Aerial Photography Centers Point
Geospatial_Data_Presentation_Form: vector digital data
Online_Linkage: http://www.blm.gov/or/gis/data.php
Description:
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.
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 19540701
Ending_Date: 20130831
Currentness_Reference:
publication date
Status:
Progress: Complete
Maintenance_and_Update_Frequency: As needed
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -125
East_Bounding_Coordinate: -116
North_Bounding_Coordinate: 49.5
South_Bounding_Coordinate: 41.5
Keywords:
Theme:
Theme_Keyword_Thesaurus: BLM-Theme
Theme_Keyword: Management
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: Aerial Photography
Theme_Keyword: Land Use Planning
Theme_Keyword: Centers
Theme_Keyword: Photogrametry
Theme:
Theme_Keyword_Thesaurus: ISO 19115
Theme_Keyword: imageryBaseMapsEarthCover
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Categories
Theme_Keyword: planningCadastre
Theme_Keyword: imageryBaseMapsEarthCover
Place:
Place_Keyword_Thesaurus: BLM-State
Place_Keyword: Washington
Place_Keyword: Oregon
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.
Point_of_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Bureau of Land Management
Contact_Person: Corey Plank
Contact_Position: Lead Cartographer
Contact_Address:
Address_Type: mailing
Address:
P.O. Box 2965
City: Portland
State_or_Province: OR
Postal_Code: 97204
Country: US
Contact_Voice_Telephone: (503) 808-6145
Contact_Electronic_Mail_Address: cplank@blm.gov
Native_Data_Set_Environment:
Microsoft Windows 2000 Version 5.2 (Build 3790) Service Pack 2; ESRI ArcCatalog 9.3.1.1850
Cross_Reference:
Citation_Information:
Originator: Bureau of Land Management, Oregon State Office
Publication_Date: 20100101
Title:
BLM OR Aerial Photography Flightlines Line
Online_Linkage: http://www.blm.gov/or/gis/data.php
Cross_Reference:
Citation_Information:
Originator: Bureau of Land Management, Oregon State Office
Publication_Date: 20100101
Title:
BLM OR Aerial Photography Boundaries Polygon
Online_Linkage: http://www.blm.gov/or/gis/data.php
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Data_Quality_Information:
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
90% of the centerpoints are within 400 feet of their actual position.
Quantitative_Horizontal_Positional_Accuracy_Assessment:
Horizontal_Positional_Accuracy_Explanation:
Based on an estimate of the amount of error expected in eyeballing and digitizing.
Vertical_Positional_Accuracy:
Vertical_Positional_Accuracy_Report:
Not applicable.
Lineage:
Process_Step:
Process_Description:
Corrected photo location information and added additional points
Process_Date: not complete
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: BLM Oregon State Office
Contact_Person: Corey Plank
Contact_Position: Lead Cartographer
Contact_Address:
Address_Type: mailing
Address:
PO Box 2965
City: Portland
State_or_Province: OR
Postal_Code: 97208-2965
Country: US
Contact_Voice_Telephone: 503-808-6145
Contact_Facsimile_Telephone: 503-808-6190
Contact_Electronic_Mail_Address: cplank@blm.gov
Process_Step:
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.
Source_Used_Citation_Abbreviation:
Scanned Lat Lon
Process_Date: unknown
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Bureau of Land Management
Contact_Person: Susan Nelson
Contact_Position: Cartographer/Remote Sensing Acquisition
Contact_Address:
Address_Type: mailing
Address:
P.O. Box 2965
City: Portland
State_or_Province: OR
Postal_Code: 97204
Country: US
Contact_Voice_Telephone: (503) 808-6139
Contact_Electronic_Mail_Address: s1nelson@blm.gov
Process_Step:
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.
Process_Date: 20120423
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Bureau of Land Management, Oregon State Office
Contact_Person: Eric Hiebenthal
Contact_Position: GIS Data Management Specialist
Contact_Address:
Address_Type: mailing
Address:
P.O. Box 2965
City: Portland
State_or_Province: OR
Postal_Code: 97208
Country: US
Contact_Voice_Telephone: 503-808-6565
Contact_Facsimile_Telephone: 503-808-6419
Contact_Electronic_Mail_Address: ehiebent@blm.gov
Process_Step:
Process_Description:
Inclusion of points from the recent imagery over the Douglas Complex and Big Windy Fires.
Process_Date: 20130925
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Bureau of Land Management
Contact_Person: Corey Plank
Contact_Position: Lead Cartographer
Contact_Address:
Address_Type: mailing
Address:
P.O. Box 2965
City: Portland
State_or_Province: OR
Postal_Code: 97208
Country: US
Contact_Voice_Telephone: (503) 808-6340
Contact_Electronic_Mail_Address: cplank@blm.gov
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Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Vector
Point_and_Vector_Object_Information:
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: Entity point
Point_and_Vector_Object_Count: 354112
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: Entity point
Point_and_Vector_Object_Count: 354112
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Entity_and_Attribute_Information:
Detailed_Description:
Entity_Type:
Entity_Type_Label: AP_Centers_Point
Attribute:
Attribute_Label: OBJECTID
Attribute_Definition:
Internal feature number.
Attribute_Definition_Source:
ESRI
Attribute_Domain_Values:
Unrepresentable_Domain:
Sequential unique whole numbers that are automatically generated.
Attribute:
Attribute_Label: Shape
Attribute_Definition:
Feature geometry.
Attribute_Definition_Source:
ESRI
Attribute_Domain_Values:
Unrepresentable_Domain:
Coordinates defining the features.
Attribute:
Attribute_Label: Roll
Attribute_Definition:
Number assigned to the film roll.
Attribute_Definition_Source:
BLM
Attribute:
Attribute_Label: Flight
Attribute_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
Attribute:
Attribute_Label: Exposure
Attribute_Definition:
Number assigned to each frame of photos.
Attribute_Definition_Source:
BLM
Attribute:
Attribute_Label: Sub_Exposure
Attribute_Definition:
Letters assigned to each frame of photos in addition to numbers.
Attribute_Definition_Source:
BLM
Attribute:
Attribute_Label: Type
Attribute_Definition:
Letter code generated automatically by the interpolation script:  M = manual, S = start, E = end, and I = interpolated.
Attribute_Definition_Source:
BLM
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: S
Enumerated_Domain_Value_Definition:
Start Point
Enumerated_Domain_Value_Definition_Source:
BLM
Enumerated_Domain:
Enumerated_Domain_Value: E
Enumerated_Domain_Value_Definition:
End Point
Enumerated_Domain:
Enumerated_Domain_Value: M
Enumerated_Domain_Value_Definition:
Digitized Middle Point
Enumerated_Domain:
Enumerated_Domain_Value: I
Enumerated_Domain_Value_Definition:
Interpolated Point
Attribute:
Attribute_Label: LabelPC
Attribute_Definition:
Compilation of Roll, Flight, Exposure, and Sub_Exposure
Attribute_Definition_Source:
BLM
Attribute:
Attribute_Label: PhotoDate
Attribute_Definition:
Date photos within a flight line were flown, if available.
Attribute_Definition_Source:
BLM
Attribute:
Attribute_Label: PhotoTime
Attribute_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
Attribute:
Attribute_Label: Proj_name
Attribute_Definition:
Project code used as a unique identifier.
Attribute_Definition_Source:
BLM
Attribute:
Attribute_Label: District
Attribute_Definition:
BLM District project is located within.
Attribute_Definition_Source:
BLM
Attribute:
Attribute_Label: Quad_Name
Attribute_Definition:
USGS Quadrangle Name
Attribute_Definition_Source:
BLM
Attribute:
Attribute_Label: Resource_Area
Attribute_Definition:
BLM Resource Management Area Name
Attribute_Definition_Source:
BLM
Attribute:
Attribute_Label: Rec_site
Attribute_Definition:
Recreation Site name 
Attribute_Definition_Source:
BLM
Attribute:
Attribute_Label: Photo_Location
Attribute_Definition:
Scanned image path and name
Attribute_Definition_Source:
BLM
Attribute:
Attribute_Label: POINT_X
Attribute:
Attribute_Label: POINT_Y
Overview_Description:
Entity_and_Attribute_Detail_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.
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Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Bureau of Land Management, Oregon State Office
Contact_Person: Eric Hiebenthal
Contact_Position: GIS Data Management Specialist
Contact_Address:
Address_Type: mailing
Address:
P.O. Box 2965
City: Portland
State_or_Province: OR
Postal_Code: 97208
Country: US
Contact_Voice_Telephone: 503-808-6565
Contact_Facsimile_Telephone: 503-808-6419
Contact_Electronic_Mail_Address: ehiebent@blm.gov
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.
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Metadata_Reference_Information:
Metadata_Date: 20120503
Metadata_Review_Date: 20131021
Metadata_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Bureau of Land Management, Oregon State Office
Contact_Person: Roger Mills
Contact_Position: GIS Spec
Contact_Address:
Address_Type: mailing
Address:
P.O. Box 2965
City: Portland
State_or_Province: OR
Postal_Code: 97208
Country: US
Contact_Voice_Telephone: (503) 808-6340
Contact_Facsimile_Telephone: (503) 808-6419
Contact_Electronic_Mail_Address: r2mills@blm.gov
Metadata_Standard_Name: FGDC Content Standard for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Time_Convention: local time
Metadata_Security_Information:
Metadata_Security_Classification_System: Not Classified
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