Description: Prior to 1976, at the County of Los Angeles, Department of Public Works (DPW), all data and mapping were recorded or prepared by hand, and stored on paper or microfilm. From 1976 to 1985, the paper maps were converted to a digital file (Cadastral Landbase) using Unix CAD.In 1999, Public Works adopted Bentley’s MicroStation as their standard CAD software, and the North American Datum (NAD83) California State Plane Coordinate System (CCS83) Zone 5 as the new datum. In the same year, the Board of Supervisors adopted a Digital Submission Ordinance (DSO), requiring digital submission of all recorded subdivision maps within the unincorporated areas. The Landbase data was then upgraded from the Unix CAD platform to a Windows-based Microstation software using the newly adopted coordinate system. The Landbase has since been continually maintained and updated with the most recent land records information, such as new subdivisions, parcel splits, street vacations, and right of way acquisitions. The DSO's has significantly speds up, streamlines, and increases the precision and accuracy of the Landbase maintenance and update process. In 2009, DPW shifted to higher gear and leveraged the new technology offered by the Geographic Information system (GIS) to convert the 383 Landbase tiles from Microstation DGN format into a seamless GIS Cadastral Landbase, which was finally integrated with the Assessor’s parcels in 2012, in close collaboration and partnership with the Assessor’s Office. As a result, the County of Los Angeles has nowin 2012 a unique authoritative dataset for use, as a Base, by all its departments and the public.
Copyright Text: County of Los Angeles Board of Supervisors; DPW; DPW Director, Mrs. Gail Farber; Automated Graphics Geographic Database Manual by Gerall V. LaRowe and Jim Lizakowski (April, 1980); Automated Graphics Geographic Database Manual by Alvin Walker (April, 1989); DPW Level Naming List by Fausto Rowlan (July, 1999). Computer Vision Layers Conversion To MicroStation Levels by Fausto Rowlan (July, 1999). Digital Cadastral Land Base Mapping Manual by Erik G. Benites (October, 2004). Special Thanks To: Gerall V. LaRowe, Jim Lizakowski, Clarence D. Thomas, Allan Abramson, John Alfred, Alvin Walker, Elaine Vaughn, Jose Mandanas, Andrew Hayami, Elmer P. Jacobs II, Leroy Kiertzner, Barbara C. Wilson, Erik G. Benites, Robert Brown, Jr. Dwayne E. Leslie, Fausto Rowlan, Thomas Browne, Elaine Fong, Hugo Acevedo, Tom Dennis, Jeff Wingate, Nha Dao, John Hickock.
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