USGS High Resolution Orthoimagery for Anne Arundel County, Maryland

Metadata also available as

Metadata:


Identification_Information:
Citation:
Citation_Information:
Originator: U.S. Geological Survey
Publication_Date: 20060209
Title:
USGS High Resolution Orthoimagery for Anne Arundel County, Maryland
Geospatial_Data_Presentation_Form: SDE raster digital data
Series_Information:
Series_Name: State Orthoimagery
Issue_Identification: 0.1
Publication_Information:
Publication_Place: Sioux Falls, SD
Publisher: U.S. Geological Survey
Online_Linkage: <http://seamless.usgs.gov>
Description:
Abstract:
"The Anne Arundel County, Maryland 2005 digital natural-color orthophotography was collected during April 2005 leaf-off conditions at a resolution of 20 centimeters to obtain a pixel resolution of 6 inches for all final orthos. The imagery was flown at approximately 6,300 ft AMT with a 30% sidelap. The data covers Anne Arundel County, MD with approximately 518 square miles of coverage. The digital orthos were delivered to Anne Arundel County in 2500'x2500' uncompressed 24-bit natural color TIFF files and in individual MrSID compressed files. Accuracy is better than ASPRS Class 1 standards for 1 inch equals 100 ft scale orthophotography with a horizontal accuracy of plus or minus 1 foot."
Purpose:
These data have been created as a result of the need for having geospatial data immediately available and easily accessible in order to provide geographic reference for Federal, State, and local emergency responders, as well as for homeland security efforts. Orthoimages also serve a variety of purposes, from interim maps to field references for earth science investigations and analysis. The digital orthoimage is useful as a layer of a geographic information system. These data can be used to provide reference information for Web browsers and for map applications at a scale of 1:100,000 or smaller. Larger scale orthoimagery such as digital orthophoto quadrangles will be more accurate, but often at the expense of timely updates. "Anne Arundel County, MD has a goal to develop and maintain a seamless county wide GIS base data set. EarthData is providing a county wide imagery base layer which will enable the county to extract valuable information from in order to accomodate their resource planning and GIS efforts."
Supplemental_Information:
The data obtained through The Seamless Server is considered to be the "best available" data from USGS. Historical data and other data may be obtained by contacting Customer Services, Center for Earth Resources Observation & Science, at 1-800-252-4547. Information in quotation marks, initial processing steps, accuracy reports, and source information is taken directly from the original metadata.Spatial-specific information not available
Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 200504
Currentness_Reference: publication date
Status:
Progress: Complete
Maintenance_and_Update_Frequency: Unknown
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate:-76.49495924
East_Bounding_Coordinate:-76.4863415
North_Bounding_Coordinate:38.9831211
South_Bounding_Coordinate:38.97435349
Keywords:
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: Digital Orthos
Theme_Keyword: Orthophotography
Theme_Keyword: Imagery
Theme_Keyword: Aerial photography
Theme_Keyword: Aerotriangulation
Theme_Keyword: ISTAR
Theme_Keyword: ADS40
Theme_Keyword: DSM
Theme_Keyword: Digital Surface Model
Theme_Keyword: DEM
Theme_Keyword: Digital Elevation Model
Theme_Keyword: digital spatial data
Theme_Keyword: 0.1524 meter orthoimage
Theme_Keyword: rectified image
Theme_Keyword: orthophoto
Theme_Keyword: natural color orthophoto
Theme_Keyword: orthoimage
Theme_Keyword: image map
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Category
Theme_Keyword: imageryBaseMapsEarthCover
Theme_Keyword: geoscientificInformation
Theme_Keyword: location
Place:
Place_Keyword_Thesaurus:
U.S. Department of Commerce, 1995, Countries, dependencies, areas of special sovereignty, and their principal administrative divisions, Federal Information Processing Standard 10-4,): Washington, D.C., National Institute of Standards and Technology
Place_Keyword: United States
Place_Keyword: U.S.
Place_Keyword: US
Place:
Place_Keyword_Thesaurus:
U.S. Department of Commerce, 1987, Codes for the identification of the States, the District of Columbia and the outlying areas of the United States, and associated areas (Federal Information Processing Standard 5-2): Washington, D.C., National Institute of Standards and Technology
Place_Keyword: MD
Place:
Place_Keyword_Thesaurus: IGS Metadata Keyword Thesaurus
Place_Keyword: Anne Arundel County
Place_Keyword: Maryland
Access_Constraints:
Any downloading and use of these data signifies a user's agreement to comprehension and compliance of the USGS Standard Disclaimer. Insure all portions of metadata are read and clearly understood before using these data in order to protect both user and USGS interests.
Use_Constraints:
There is no guarantee of warranty concerning the accuracy of the data. Users should be aware that temporal changes may have occurred since this data set was collected and that some parts of this data may no longer represent actual surface conditions. Users should not use this data for critical applications without a full awareness of it's limitations. Acknowledgement of the originating agencies would be appreciated in products derived from these data. Any user who modifies the data is obligated to describe the types of modifications they perform. User specifically agrees not to misrepresent the data, nor to imply that changes made were approved or endorsed by the U.S. Geological Survey. Please refer to <http://www.usgs.gov/privacy.html> for the USGS disclaimer.
Point_of_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Geological Survey
Contact_Position: Customer Services Representative
Contact_Address:
Address_Type: mailing and physical address
Address: USGS Center for Earth Resources Observation & Science
Address: 47914 252nd Street
City: Sioux Falls
State_or_Province: SD
Postal_Code: 57198-0001
Country: USA
Contact_Voice_Telephone: 605/594-6151
Contact_Voice_Telephone: 1-800-252-4547
Contact_TDD/TTY_Telephone: 605/594-6933
Contact_Facsimile_Telephone: 605/594-6589
Contact_Electronic_Mail_Address: custserv@usgs.gov
Hours_of_Service: 0800 - 1600 CT, M - F (-6h CST/-5h CDT GMT)
Data_Set_Credit:
U.S. Geological Survey, EarthData International, Inc., and TerraSurv, Inc. "This data set was acquired, processed, and managed by EarthData International, Inc. and its Aviation division. All ground control was surveyed by TerraSurv, Inc. and provided to EarthData for processing the digital orthophotography. All data was produced for Anne Arundel County, MD.
Security_Information:
Security_Classification_System: None
Security_Classification: Unclassified
Security_Handling_Description: N/A
Native_Data_Set_Environment:
Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.1.0.722

Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
"The digital orthophotos were evaluated by EarthDataInternational, Inc. to ensure each tile extent was 2500 feet x2500 feet in size, the project area was covered, and thedigital orthoimagery was 6 inches in pixel resolution. Thedata was reviewed to ensure that it was seamless andradiometrically accurate as well as within the ASPRS C1standard."
Logical_Consistency_Report:
"Compliance with the accuracy standard was ensured bythe collection of photo identifiable GPS ground controlafter the acquisition of aerial imagery. The followingchecks were performed.1. The ground control and airborne GPS data stream werevalidated through a fully analytical bundleaerotriangulation adjustment.2. The lidar DEM was inspected during the initialprocessing for accuracy and coverage.3. Digital orthophotography was validated through aninspection of edge matching and visual inspection forimage quality."
Completeness_Report:
"The following methods are used to assure imageryaccuracy.1. Use of IMU and ground control network utilizing GPStechniques.2. Use of airborne GPS in conjunction with the acquisitionof imagery.The following software is used for validation of theimagery and surface modeling1. Aerotriangulation - ISTAR2. DEM data - ISTAR3. Digital Orthophotography - ISTAR4. Bentley - MicroStation5. ISTAR6. ZI - OrthoPro7. ESRI - ArcInfo8. ERDAS Imagine9. Terrascan10. EarthData Proprietary software11. Adobe - Photoshop"
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
"All digital orthophotography was reviewed and checkedto ensure that it met or was better than ASPRS class 1 for1 inch equals 100 foot mapping with a horizontal accuracyof plus or minus 1 foot."
Vertical_Positional_Accuracy:
Vertical_Positional_Accuracy_Report:
"Consistent with procedures in the ASPRS Class 1 suitablefor rectification of digital orthophotos."
Lineage:
Source_Information:
Source_Citation:
Citation_Information:
Originator: EarthData Aviations
Publication_Date: 20050416
Title:
Aerial Imagery Acquisition for the Digital Orthophotography of Anne Arundel County, Maryland
Edition: 1
Geospatial_Data_Presentation_Form: remote-sensing image
Type_of_Source_Media: firewire
Source_Time_Period_of_Content:
Time_Period_Information:
Multiple_Dates/Times:
Single_Date/Time:
Calendar_Date: 20050411
Single_Date/Time:
Calendar_Date: 20050416
Source_Currentness_Reference: ground condition
Source_Citation_Abbreviation: Aerial Acquisition
Source_Contribution:
"The aerial imagery acquisition for Anne Arundel Countywas flown to support the creation of digitalorthophotography with a 6-inch pixel resolution. Theimagery was acquired in two sorties. The 6-inch pixelortho imagery were flown at 6,300 feet AMT with a 30%side lap. There were 26 flight lines in total for the projectarea. All imagery was collected using the Leica ADS40digital pushbroom sensor."
Source_Information:
Source_Citation:
Citation_Information:
Originator: TerraSurv, Inc.
Publication_Date: 20050722
Title:
Ground Control for the Orthophotography of Anne Arundel County, MD
Edition: 1
Geospatial_Data_Presentation_Form: model
Type_of_Source_Media: electronic mail
Source_Time_Period_of_Content:
Time_Period_Information:
Multiple_Dates/Times:
Single_Date/Time:
Calendar_Date: 20050721
Single_Date/Time:
Calendar_Date: 20050722
Source_Currentness_Reference: ground condition
Source_Citation_Abbreviation: Ground Control
Source_Contribution:
"TerraSurv Inc. was contracted by EarthData Internationalto acquire 20 photo identifiable ground control points afterthe acquisition of aerial imagery. The ground controlpoints were established using GPS for vertical andhorizontal coordinate values. A complete ground controlsurvey report will also be provided to Anne ArundelCounty with all surveyed results."
Process_Step:
Process_Description:
"The airborne GPS data were processed and integratedwith the IMU. The results were imported into the ISTARsystem for use in the aerotriangulation. The ADS40imagery was downloaded onto the EarthData server andbrought over to the UNIX based ISTAR system. Theground control was used in conjunction with the processedABGPS results for the aerotriangulation. The properlyformatted ISTAR results were used for subsequentprocessing."
Source_Used_Citation_Abbreviation: Aerotriangulation
Process_Date: 20051109
Source_Produced_Citation_Abbreviation: AT
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: EarthData International, Inc.
Contact_Person: Scott Lane
Contact_Position: Project Manager
Contact_Address:
Address_Type: mailing and physical address
Address: 7320 Executive Way
City: Frederick
State_or_Province: MD
Postal_Code: 21704USA
Contact_Voice_Telephone: (301)-948-8550
Contact_Facsimile_Telephone: (301)-963-2064
Contact_Electronic_Mail_Address: slane@earthdata.com
Hours_of_Service: Mon - Fri 9:00am to 5:00pm
Process_Step:
Process_Description:
"The ISTAR process utilized a lidar DEM provided byAnne Arundel County, MD. The DEM was provided inASCII format and was utilized to rectify the imagery andcreate digital orthos."
Source_Used_Citation_Abbreviation: Digital Elevation Model
Process_Date: 20051118
Source_Produced_Citation_Abbreviation: DEM
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: EarthData International
Contact_Person: Scott Lane
Contact_Position: Project Manager
Contact_Address:
Address_Type: mailing and physical address
Address: 7320 Executive Way
City: Frederick
State_or_Province: MD
Postal_Code: 21704USA
Contact_Voice_Telephone: (301)-948-8550
Contact_Facsimile_Telephone: (301)-963-2064
Contact_Electronic_Mail_Address: slane@earthdata.com
Hours_of_Service: Mon - Fri 9:00 am to 5:00 pm
Process_Step:
Process_Description:
"The digital orthophotography for Anne Arundel County iscomprised of a 6-inch pixel resolution and is in groundortho rendition.Once the client provided DEM data for the ground orthoareas were integrated into the ISTAR system the initialradiometric adjustments were performed on the imageryfor each flight line attempting to reach the bestpossible histogram. The rectification process was runusing the processed DEM surface and the radiometricallybalanced imagery on each flight line. A second set ofradiometric adjustments were made and mosaic lineswere placed. QA/QC was performed looking for smearsand other indications of problems within the digitalorthophoto creation process. The final imagery data set isremoved from the ISTAR environment in a process called"packaging" where the individual tiles are created. Thecreated tiles are reviewed again for anomalies andinteractive radiometric adjustment applied where needed.The final digital ortho products were produced anddelivered in 2,500 ft x 2,500 ft sized tiles in uncompressedTIFF files and compressed MrSID files with acompression ratio of 20:1. All final orthos were projectedto NAD83, Maryland State Plane, NAVD88, U.S. SurveyFeet and were in natural color rendition at a scale of 1 inchequals 100 feet. Data was delivered on firewire drive."
Source_Used_Citation_Abbreviation: Digital Orthophotos
Process_Date: 20060206
Source_Produced_Citation_Abbreviation: Digital Orthos
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: EarthData International
Contact_Person: Scott Lane
Contact_Position: Project Manager
Contact_Address:
Address_Type: mailing and physical address
Address: 7320 Executive Way
City: Frederick
State_or_Province: MD
Postal_Code: 21704
Contact_Voice_Telephone: 301-948-8550
Contact_Electronic_Mail_Address: slane@earthdata.com
Hours_of_Service: Mon - Fri 9:00 am to 5:00 pm
Process_Step:
Process_Description:
The metadata were imported and updated for display through the Seamless Data Distribution System at <http://seamless.usgs.gov> The metadata are available in several formats: HTML, TEXT, XML, FAQ and SGML.
Process_Date: 200608
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Geological Survey
Contact_Position: Customer Service Representative
Contact_Address:
Address_Type: mailing and physical address
Address: USGS Center for Earth Resources Observation & Science
Address: 47914 252nd Street
City: Sioux Falls
State_or_Province: SD
Postal_Code: 57198-0001
Country: USA
Contact_Voice_Telephone: 605-594-6151
Contact_Voice_Telephone: 1-800-252-4547
Contact_TDD/TTY_Telephone: 605-594-6933
Contact_Facsimile_Telephone: 605-594-6589
Contact_Electronic_Mail_Address: custserv@usgs.gov
Hours_of_Service: 0800 - 1600 CT, M - F (-6h CST/-5h CDT GMT)
Contact_Instructions:
The USGS point of contact is for questions relating only to the data display and download from this web site. For questions regarding data content and quality, refer to original processor.

Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Raster
Raster_Object_Information:
Raster_Object_Type: Pixel
Row_Count: 390000
Column_Count: 270000
Vertical_Count: 1

Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Planar:
Map_Projection:
Map_Projection_Name: Lambert Conformal Conic
Lambert_Conformal_Conic:
Standard_Parallel: 38.300000
Standard_Parallel: 39.450000
Longitude_of_Central_Meridian: -77.000000
Latitude_of_Projection_Origin: 37.666667
False_Easting: 1312333.333333
False_Northing: 0.000000
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: row and column
Coordinate_Representation:
Abscissa_Resolution: 0.500000
Ordinate_Resolution: 0.500000
Planar_Distance_Units: survey feet
Geodetic_Model:
Horizontal_Datum_Name: North American Datum of 1983
Ellipsoid_Name: Geodetic Reference System 80
Semi-major_Axis: 6378137.000000
Denominator_of_Flattening_Ratio: 298.257222
Vertical_Coordinate_System_Definition:
Altitude_System_Definition:
Altitude_Datum_Name: North American Vertical Datum of 1988
Altitude_Resolution: 1.000000
Altitude_Distance_Units: meters
Altitude_Encoding_Method:
Explicit elevation coordinate included with horizontal coordinates

Entity_and_Attribute_Information:
Overview_Description:
Entity_and_Attribute_Overview:
For color-infrared and natural color DOQs, a digital number from zero to 255 will be assigned to each pixel but that number will refer to a color look-up table which will contain the RGB red, blue and green (RGB) values, each from zero to 255, for that digital number. Areas where the rectification process is incomplete due to incomplete data (i.e., lack of elevation data, gaps), are represented with the numeric value of zero.
Entity_and_Attribute_Detail_Citation:
U.S. Department of the Interior, U.S. Geological Survey, 1999, Standards for Digital Orthoimagery: Reston, VA

Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Geological Survey
Contact_Position: Customer Services Representative
Contact_Address:
Address_Type: mailing and physical address
Address: USGS Center for Earth Resources Observation & Science
Address: 47914 252nd Street
City: Sioux Falls
State_or_Province: SD
Postal_Code: 57198-0001
Country: USA
Contact_Voice_Telephone: 605/594-6151
Contact_Voice_Telephone: 1-800-252-4547
Contact_TDD/TTY_Telephone: 605/594-6933
Contact_Facsimile_Telephone: 605/594-6589
Contact_Electronic_Mail_Address: custserv@usgs.gov
Hours_of_Service: 0800 - 1600 CT, M - F (-6h CST/-5h CDT GMT)
Contact_Instructions:
The USGS point of contact is for questions relating only to the data display and download from this web site. For questions regarding data content and quality, refer to the original processor.
Resource_Description: Downloadable Data
Distribution_Liability:
Although these data have been processed successfully on a computer system at the USGS, no warranty expressed or implied is made by the USGS regarding the use of the data on any other system, nor does the act of distribution constitute any such warranty. Data may have been compiled from various outside sources. Spatial information may not meet National Map Accuracy Standards. This information may be updated without notification. The USGS shall not be liable for any activity involving these data, installation, fitness of the data for a particular purpose, its use, or analyses results.
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: Arc/Info Export Format and/or ArcView Shapefile
Format_Version_Number: ArcGIS 9.1
Format_Specification: ASCII
Transfer_Size: 0.001
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name: <http://seamless.usgs.gov>
Access_Instructions:
The URL <http://seamless.usgs.gov> provides a map interface that allows for data downloads within a customer defined area of interest. Zoom tools are available that can be used to investigate areas of interest on the map interface. The download tool allows the customer to capture layers from the map, utilizing the Seamless Data Distribution System process for downloading. A request summary page is then generated with the download layers listed. By clicking the "download" button on the summary page, a zipped file will be generated that can be saved on the customer's computer. The file can then be unzipped and imported into various user software applications.
Online_Computer_and_Operating_System: Not available for dissemination
Fees: None
Turnaround: Variable
Technical_Prerequisites:
ESRI ArcGIS Suite and/or Arc/Info or other compatible software, and supporting operating systems.
Available_Time_Period:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: unknown

Metadata_Reference_Information:
Metadata_Date: 20060818
Metadata_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Geological Survey
Contact_Position: Customer Services Representative
Contact_Address:
Address_Type: mailing and physical address
Address: USGS Center for Earth Resources Observation & Science
Address: 47914 252nd Street
City: Sioux Falls
State_or_Province: SD
Postal_Code: 57198-0001
Country: USA
Contact_Voice_Telephone: 605/594-6151
Contact_Voice_Telephone: 1-800-252-4547
Contact_TDD/TTY_Telephone: 605/594-6933
Contact_Facsimile_Telephone: 605/594-6589
Contact_Electronic_Mail_Address: custserv@usgs.gov
Hours_of_Service: 0800 - 1600 CT, M - F (-6h CST/-5h CDT GMT)
Contact_Instructions:
The above is the contact information for the USGS Center for Earth Resources Observation and Science in Sioux Falls, SD. This is the digital data storage and distribution center for the USGS. Metadata information can also be obtained through online services using The National Map Viewer, at <http://nationalmap.usgs.gov>
Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Time_Convention: local time
Metadata_Access_Constraints: None
Metadata_Use_Constraints: None
Metadata_Security_Information:
Metadata_Security_Classification_System: None
Metadata_Security_Classification: Unclassified
Metadata_Security_Handling_Description: None
Metadata_Extensions:
Online_Linkage: <http://www.esri.com/metadata/esriprof80.html>
Profile_Name: ESRI Metadata Profile

Generated by mp version 2.8.6 on Fri Aug 18 10:59:59 2006