sht_15

Metadata also available as

Metadata:
Identification_Information:
Citation:
Citation_Information:
Originator: Horizons, Inc.
Publication_Date: 20030629
Title: sht_15
Edition: One
Geospatial_Data_Presentation_Form: Vector and Raster Digital Mapping Data
Publication_Information:
Publication_Place: Denver, Colorado
Publisher: Bureau of Reclamation, Upper Colorado Regional Office
Other_Citation_Details: None
Online_Linkage: Unknown
Description:
Abstract:
Horizons, Inc. was contracted by the Bureau of Reclamation to provide accurate digital elevation and orthophotogrammetric data. The project encompassed an area of approximately 20 square miles. The photogrammetric process began with black and white aerial photography obtained by subcontractor Walker & Associates of Seattle, Washington on October 23, 2002 at 1:12000 photo scale utilizing airborne GPS control. LiDAR acquisition was performed by Horizons, Inc. on October 30, 2002 at 6000' AMT. The Cessna 310 was equipped with an LH System ALS40 LiDAR system including an inertial measuring unit (IMU) and a dual frequency airborne GPS receiver. LiDAR data was collected with 2 meter nominal post spacing and +/- 15 cm vertical accuracy. Ground control survey was provided by the Bureau of Reclamation. The original black and white film was scanned at 14 microns. Aerotriangulation of the photography was performed utilizing Albany Aerotriangulation Software. A final AT Report summarizing adjustments was produced and AT solutions for the controlled photography were provided in Z/I software compatible file format. LiDAR data was processed to create an elevation model and orthophoto production. LiDAR data processing included removal of points on vegetation and buildings. LiDAR data sets produced included raw/multiple return, first return only, processed (bare earth) and 2 meter grid of the bare earth. A LiDAR Report summarizing processing procedures was produced. Digital orthophotography with 0.2m pixel resolution TIFF format was produced.
Purpose: For the intended use of Bureau of Reclamation
Supplemental_Information:
This metadata document is intended to encompass the entire mapping area. Bounding coordinates are for all 18, while row and column counts refer to each individual orthophoto.
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20021001
Ending_Date: 20030630
Currentness_Reference: Publication Date
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -123.7075
East_Bounding_Coordinate: -123.6777
North_Bounding_Coordinate: 47.5526
South_Bounding_Coordinate: 47.5326
Keywords:
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: Aerial Photography
Theme_Keyword: LiDAR Acquisition
Theme_Keyword: Orthophoto
Place:
Place_Keyword_Thesaurus: None
Place_Keyword: Quinault River
Place_Keyword: Washington
Access_Constraints: None
Use_Constraints: None
Point_of_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Bureau of Reclamation, Upper Colorado Regional Office
Contact_Person: Jennifer Bountry, P.E. and Matt Jones
Contact_Position: Hydraulic Engineer and GIS Specialist
Contact_Address:
Address_Type: mailing and physical address
Address:
Geophysics Technical Service Center, 6th & Kipling, D-8330, Bldg67, Rm1079
City: Denver
State_or_Province: Colorado
Postal_Code: 80225
Country: United States
Contact_Voice_Telephone: 303-445-3614 (Jennifer Bountry), 303-445-3198 (Matt Jones)
Contact_Facsimile_Telephone: 303-445-6351, 303-445-6507
Contact_Electronic_Mail_Address: jbountry@do.usbr.gov, mjones@do.usbr.gov
Hours_of_Service: unknown
Native_Data_Set_Environment: Windows NT 4.0
Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
The airborne GPS data was processed as a kinematic survey, using both forward and reverse processing techniques. The IMU data was processed using POSProc software provided by Applanix Corporation. The X, Y, Z, omega, phi, and kappa for each photograph were calculated and the final adjustment of this block was solved using Erio Technologies ALBANY software(ALBANY is a simultaneous least squares bundle adjustment).
Logical_Consistency_Report: None
Completeness_Report: None
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
The horizontal RMS for the airborne GPS is: X - RMS = 0.225 feet Y - RMS = 0.329 feet, X-Y vector is 0.399 feet.
Vertical_Positional_Accuracy:
Vertical_Positional_Accuracy_Report:
The vertical RMS for the airborne GPS is: Z - RMS = 0.222 feet. The vertical RMS for the LiDAR data is 0.147 feet.
Lineage:
Source_Information:
Source_Citation:
Citation_Information:
Originator: Horizons, Inc.
Publication_Date: 20030629
Title: Quinault River, Washington Aerial Mapping and Orthophotograpy
Source_Contribution: None
Source_Scale_Denominator: 12000
Type_of_Source_Media: Black and White Aerographic 2405 Film
Source_Time_Period_of_Content:
Source_Currentness_Reference: Ground Condition
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 20021023
Source_Citation_Abbreviation: None
Process_Step:
Process_Description:
Quality Control Procedure Scanner:Intergraph PhotoScan TD Photo Digitizing System. Scanner Geometric Calibration:Standard Deviation(sigma)=1.6710356970 Root Mean Square X=1.9970393211 Root Mean Square Y=0.9624905604 Scanner setting: Transmissivity: 0.0151 0.6610 Film Density: 1.8210 0.1778 Gamma: 1.75 Film was kept in airtight containers prior to scanning. Both the base and emulsion sides of the film were cleaned using a tacky roller system prior to scanning. Color adjustment was achieved by visually matching the tone, contrast, and brightness to the original film. Each scanned image was checked computationally for missing data. Quality Control Procedures for LiDAR Processing: AeroScan LiDAR timed reflection data and the IMU SBET flies were processed together using LiDAR processing software. The data set for each flight line was checked for data gaps between overlapping flightlines, and tension/compression areas (areas where data points are more or less dense that the average project specified post spacing). LiDAR data was collected for bi- and cross- directional flight lines over an airport prior to acquisition of the project area. Comparative analysis of the data produced a preliminary omega,phi,kappa correction. LiDAR data was processed and evaluated until angles met project specifications. All flight lines (airport and project) were checked and verified for vertical accuracy of 15 cm. An intensity raster for each flight line was generated and verified that intensity was recorded for each LiDAR point. Static survey ground control points at the airport were compared to the LiDAR data set and the LiDAR data was vertically biased down to the ground. Lidar data in overlap areas of project flight lines was removed. The raw LiDAR data set was processed through a minimum block mean algorithm and points were classified as either bare earth or non-bare earth. User developed macros that factor mean terrain angle and height from the ground were used to determine bare earth point classification. A 2D edit (surfacing) process ensures the accuracy of the automated feature classification. Imagery, intensity of the LiDAR reflection and tin-editing software were combined to assess points. LiDAR points were classified into bare earth, top of canopy, intermediate canopy, buildings, noise, water, miscellaneous structures or unclassified points. 2D surfaced LiDAR data and stero imagery was edited in softcopy photogrammetric workstations with 3D viewing and compilation capibilities. Contours generated from the LiDAR data were compared to the imagery. Breakline features, water features and planimetric data were collected. Data points remaining on structures and/or vegetation and data falling within water features was removed. LiDAR data erroneously removed during the surfacing process was included. Quality Control Procedures for orthophoto production: Individual orthophotos were mosaiced into a regional database and the resulting orthophoto composite was visually inspected for tone balance and image distortion. The final orthophotos were visually inspected for accuracy and consistency.
Source_Used_Citation_Abbreviation: None
Process_Date: 20030629
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Mary Bosworth, P.E.
Contact_Organization: Horizons,Inc.
Contact_Position: Project Manager Horizons Job #03-5816
Contact_Address:
Address_Type: mailing and physical address
Address: 3600 Jet Drive
City: Rapid City
State_or_Province: South Dakota
Postal_Code: 57703
Country: United States
Contact_Voice_Telephone: 605-343-0280
Contact_Facsimile_Telephone: 605-343-0305
Contact_Electronic_Mail_Address: bosworth@horizonsinc.com
Hours_of_Service: 8am-5pm Mountain Time
Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Raster
Raster_Object_Information:
Raster_Object_Type: Pixel
Row_Count: 11000
Column_Count: 11100
Vertical_Count: 2
Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Planar:
Map_Projection:
Map_Projection_Name: Transverse Mercator
Transverse_Mercator:
Scale_Factor_at_Central_Meridian: 0.9996
Longitude_of_Central_Meridian: -123.0000
Latitude_of_Projection_Origin: 0.0000
False_Easting: 500000.0000
False_Northing: 0.0000
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: Row and column
Planar_Distance_Units: Meters
Coordinate_Representation:
Abscissa_Resolution: 0.1
Ordinate_Resolution: 0.1
Geodetic_Model:
Horizontal_Datum_Name: NAD83
Ellipsoid_Name: GRS 1980
Semi-major_Axis: 6378137.0000000
Denominator_of_Flattening_Ratio: 298.26
Entity_and_Attribute_Information:
Overview_Description:
Entity_and_Attribute_Overview:
Walker & Associates - Camera#140241,Serial#134668,CFL 153.742 Orthophoto Pixel Size = 0.2 meter
Entity_and_Attribute_Detail_Citation: None
Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Bureau of Reclamation
Contact_Person: Jennifer Bountry, P.E. and Matt Jones
Contact_Position: Hydraulic Engineer and GIS Specialist
Contact_Address:
Address_Type: mailing and physical address
Address:
Geophysics Technical Service Center, 6th & Kipling, D-8330, Bldg67, Rm1079
City: Denver
State_or_Province: Colorado
Postal_Code: 80225
Country: United States
Contact_Voice_Telephone: 303-445-3614 (Jennifer Bountry), 303-445-3198 (Matt Jones)
Contact_Facsimile_Telephone: 303-445-6351, 303-445-6507
Contact_Electronic_Mail_Address: jbountry@do.usbr.gov, mjones@do.usbr.gov
Hours_of_Service: unknown
Resource_Description: Quinault River, Washington Aerial Mapping and Orthophotography
Distribution_Liability: Unknown
Metadata_Reference_Information:
Metadata_Date: 20030629
Metadata_Review_Date: 20030629
Metadata_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Horizons, Inc.
Contact_Person: Mary Bosworth, P.E.
Contact_Position: Project Manager Horizons Job #03-5816
Contact_Address:
Address_Type: Mailing and physical address
Address: 3600 Jet Drive
City: Rapid City
State_or_Province: South Dakota
Postal_Code: 57703
Country: United States
Contact_Voice_Telephone: 605-343-0280
Contact_Facsimile_Telephone: 605-343-0305
Contact_Electronic_Mail_Address: bosworth@horizonsinc.com
Hours_of_Service: 8am-5pm Mountain Time
Metadata_Standard_Name: FGDC CSDGM
Metadata_Standard_Version: FGDC-STD-001-1998
Generated by mp version 2.7.33 on Sun Jun 29 08:56:22 2003