Identification_Information: Citation: Citation_Information: Originator: Sanborn Map Company, Inc. Publication_Date: Unpublished Material Title: 4 Inch Pixel Resolution Digital Orthoimagery Geospatial_Data_Presentation_Form: raster digital data Description: Abstract: These files contain Natural Color 0.33-foot GSD high-resolution orthorectified aerial image map products in GeoTIFF. The LAR-IAC3 project encompasses the entire land area of Los Angeles County in mainland plus Catalina Island. The County boundary in mainland and was buffered by 500 feet. The 0.33-foot resolution digital orthoimagery was developed over the majority of urban/suburban areas of the County in mainland covering approximately 3076 square miles and Catalina Island covering approximately 107 square miles. One foot (1-foot) resolution digital orthoimagery was developed over the forest areas of the County covering approximately 1,080 square miles. Purpose: The digital ortho photos are produced to use it for various purposes such as Planimetric data capture, Emergency management, Land use or land cover, Economic development, Environment management, Wetlands management, etc. Supplemental_Information: Los Angeles County provided the digital elevation model (DEM) data for the purposes of orthorectification. Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 20101216 Ending_Date: 20110718 Currentness_Reference: ground condition Status: Progress: Complete Maintenance_and_Update_Frequency: As needed Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -118.950783 East_Bounding_Coordinate: -117.649828 North_Bounding_Coordinate: 34.830113 South_Bounding_Coordinate: 33.291761 Keywords: Theme: Theme_Keyword_Thesaurus: Digital Orthophoto Theme_Keyword: Land use or land cover Theme_Keyword: Emergency management Theme_Keyword: Planimetric Theme_Keyword: Economic development Theme_Keyword: Environment Theme_Keyword: Wetlands Theme_Keyword: Infrastructure or ground transportation Theme_Keyword: Tourism or recreation Theme_Keyword: Miscellaneous Place: Place_Keyword_Thesaurus: California Place_Keyword: Los Angeles County Place_Keyword: USA Access_Constraints: This is a proprietary dataset provided courtesy of the Los Angeles Region Imagery Acquisition Consortium (LAR-IAC), Pictometry International Corp. and The Sanborn Map Company, Inc. Use other than what is allowable under license or by written permission from Pictometry International Corp. or The Sanborn Map Company, Inc. will be considered unauthorized and may be punishable by law. Permission for external use may be given with written permission from Pictometry International Corp. or The Sanborn Map Company, Inc. Use_Constraints: This is a proprietary dataset provided courtesy of the Los Angeles Region Imagery Acquisition Consortium (LAR-IAC), Pictometry International Corp. and The Sanborn Map Company, Inc. Use other than what is allowable under license or by written permission from Pictometry International Corp. or The Sanborn Map Company, Inc. will be considered unauthorized and may be punishable by law. Permission for external use may be given with written permission from Pictometry International Corp. or The Sanborn Map Company, Inc. Point_of_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Mark Greninger Contact_Organization: Los Angeles County Chief Information Office Contact_Address: Address_Type: mailing address Address: 350 S. Figueroa Street, Suite 188 City: Los Angeles State_or_Province: California Postal_Code: 90071 Country: United States of America Contact_Voice_Telephone: 213 253-5624 Contact_Facsimile_Telephone: None Contact_Electronic_Mail_Address: mgreninger@cio.lacounty.gov Native_Data_Set_Environment: Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 3; ESRI ArcCatalog 9.2.5.1450 Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: N/A Quantitative_Attribute_Accuracy_Assessment: Attribute_Accuracy_Value: N/A Attribute_Accuracy_Explanation: Orthoimagery does not contain attribution. Logical_Consistency_Report: The dataset contains raster images of digital orthophotos so the logical consistency report is not applicable. The file naming convention of the 0.33-foot resolution tiles is based on the 1-foot resolution tiles. The 1-foot resolution tile is a Basic Modular Unit. It measures 5,280 ft x 5,280 ft. based on the California State Plan Coordinate System, Zone V. The origin of the tile grid system was arbitrary. The neat image area is bounded by the state plane grid whose Easting and Northing are evenly divisible by 5,280 feet. The 0.33-foot pixel resolution tile is one fourth (1/4) of a Basic Modular Unit. The neat area of this unit measures 2,640 ft x 2,640 ft. Each Basic Modular Unit map is identified by a map number derived from selected paired digits of the east and north coordinates of the southwest corner of the module. For example, a tile with the lower left corner coordinates of E = 6,345,000 and N = 2,042,000 will be known as Tile Number L2_6345_2042. The first four digits represent the first four numbers of the East coordinates and the last four numbers represent the first four numbers of the North coordinates. Each subunit for the 0.33-foot resolution tiles is identified with the Basic Modular Unit plus the letter a,b,c, and d numbered clockwise from the south westerly quadrant. The L2 prefix designates the tile was produced for the LAR-IAC3 program. Completeness_Report: The digital orthoimagery has been inspected against the tile and project boundaries to ensure complete coverage. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: The digitial orthoimagery meets the reported accuracy to the National Standards for Spatial Data Accuracy (NSSDA): RMSEx and RMSEy = 1. Quantitative_Horizontal_Positional_Accuracy_Assessment: Horizontal_Positional_Accuracy_Value: 1 Horizontal_Positional_Accuracy_Explanation: Compiled to meet 2.4 feet horizontal accuracy at 95% confidence level in accordance with National Standards for Spatial Data Accuracy (NSSDA). Vertical_Positional_Accuracy: Vertical_Positional_Accuracy_Report: Not Available Quantitative_Vertical_Positional_Accuracy_Assessment: Vertical_Positional_Accuracy_Value: 0 Vertical_Positional_Accuracy_Explanation: Orthoimagery does not contain inherent vertical accuracy. Lineage: Source_Information: Type_of_Source_Media: Digital Source_Citation: Citation_Information: Originator: LAR-IAC and Pictometry International Corp. Publication_Date: Unknown Title: Control Geospatial_Data_Presentation_Form: tabular digital data Source_Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 20101216 Ending_Date: 20110718 Source_Currentness_Reference: ground condition Source_Citation_Abbreviation: CONT Source_Contribution: Surveyed ground control coordinates used to support the aerial triangulation and positional accuracy validation of the orthoimagery was provided by LAR-IAC. The airborne GPS/IMU data used to support the aerial triangulation was collected and processed by Pictometry International Corp. Source_Information: Type_of_Source_Media: Digital Source_Citation: Citation_Information: Originator: Pictometry International Corp. Publication_Date: 2011 Title: Aerial Imagery Geospatial_Data_Presentation_Form: raster digital data Source_Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 20101216 Ending_Date: 20110718 Source_Currentness_Reference: ground condition Source_Citation_Abbreviation: IMA Source_Contribution: Aerial imagery incorporated in the orthrectification was provided by Pictometry International Corp. Source_Information: Type_of_Source_Media: Digital Source_Citation: Citation_Information: Originator: Pictometry International Corp. Publication_Date: 20090218 Title: Aerial Triangulation Geospatial_Data_Presentation_Form: document Source_Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 20101216 Ending_Date: 20110718 Source_Currentness_Reference: ground condition Source_Citation_Abbreviation: AT Source_Contribution: Aerial triangulation data used in the orthorectification process was provided by Pictometry International Corp. Source_Information: Type_of_Source_Media: Digital Source_Citation: Citation_Information: Originator: LAR-IAC Publication_Date: Unknown Title: Digital Elevation Model Geospatial_Data_Presentation_Form: vector digital data Source_Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 20101216 Ending_Date: 20110718 Source_Currentness_Reference: ground condition Source_Citation_Abbreviation: DEM Source_Contribution: Digital eleveation models (DEM) were provided by the LAR-IAC to support the orthorectification process. Process_Step: Process_Description: Existing Digital Elevation Models were updated where necessary to support the orthorectification process using softcopy workstations. The images were then ortho rectified and color balanced. Seamless mosaicing was performed and the seamless mosaic was clipped into tiles. Source_Used_Citation_Abbreviation: AT Source_Used_Citation_Abbreviation: IMA Source_Used_Citation_Abbreviation: DEM Process_Date: 2011 Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: Sanborn Map Co., Inc. Contact_Person: Krysia Sapeta Contact_Position: Project Manager Contact_Address: Address_Type: mailing and physical address Address: 1935 Jamboree Drive City: Colorado Springs State_or_Province: CO Postal_Code: 80920 Country: USA Contact_Voice_Telephone: 719-593-0093 Contact_Facsimile_Telephone: 719-528-5093 Contact_Electronic_Mail_Address: ksapeta@sanborn.com Hours_of_Service: 8:00 AM - 5:00 PM M-F MST Cloud_Cover: 5 Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Raster Raster_Object_Information: Raster_Object_Type: Pixel Row_Count: 8000 Column_Count: 8000 Vertical_Count: 1 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Map_Projection: Map_Projection_Name: Lambert Conformal Conic Lambert_Conformal_Conic: Standard_Parallel: 34.033333 Standard_Parallel: 35.466667 Longitude_of_Central_Meridian: -118.000000 Latitude_of_Projection_Origin: 33.500000 False_Easting: 6561666.666667 False_Northing: 1640416.666667 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: coordinate pair Coordinate_Representation: Abscissa_Resolution: 0.330000 Ordinate_Resolution: 0.330000 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 Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: Los Angeles County Chief Information Office (CIO) Contact_Person: Mark Greninger Contact_Address: Address_Type: mailing address Address: 350 S. Figueroa Street, Suite 188 City: Los Angeles State_or_Province: California Postal_Code: 90071 Country: United States of America Contact_Voice_Telephone: 213 253 5624 Contact_Electronic_Mail_Address: mgreninger@cio.lacounty.gov Resource_Description: Downloadable Data Distribution_Liability: Contact LAR-IAC Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: GeoTIFF 6.0 Format_Version_Number: 6.0 Transfer_Size: 1.652 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: Not Available Fees: Contact Metadata_Reference_Information: Metadata_Date: 20120521 Metadata_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: Los Angeles County Chief Information Office Contact_Person: Mark Greninger Contact_Address: Address_Type: mailing address Address: 350 S. Figueroa Street, Suite 188 City: Los Angeles State_or_Province: California Postal_Code: United States of America Contact_Voice_Telephone: 213-253-5624 Contact_Electronic_Mail_Address: mgreninger@cio.lacounty.gov Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Time_Convention: local time Metadata_Security_Information: Metadata_Security_Classification_System: Not Available Metadata_Security_Classification: Unclassified Metadata_Security_Handling_Description: Not Available Metadata_Extensions: Metadata_Extensions: Online_Linkage: http://www.esri.com/metadata/esriprof80.html Profile_Name: ESRI Metadata Profile