Aerial Topographic Survey Control A. Set aerial control panels at locations by aerial mapping company, if any. Perform field survey and office calculations to determine horizontal and vertical locations of aerial control panels. Survey to be tied into appropriate benchmarks. B. Provide ASCII digital file with coordinates and elevations of aerial control points. Boundary Survey A. Perform research at County Survey Records Department and City Engineering Department to obtain record maps necessary to perform boundary survey. Obtain copy of assessor’s parcel map, record maps, records of survey, etc. B. District will purchase Preliminary Title Reports for the subject properties and provide all referenced documents in the title reports. C. Perform field boundary survey to locate existing property corner monuments and survey monuments on adjoining properties as necessary to determine property boundary location. D. Compute location of property boundary and plot in same coordinate reference with aerial mapping, if any. Include in digital and paper copies to be provided to District. E. Coordination with District, Master Architect, and others as needed. Complete Comprehensive Base Mapping (utilities, easements, boundary, and topography) A. Perform research at City Engineering Department to obtain record drawings for existing public (and private) improvements including existing city-owned utilities on or within the influence of the proposed project. B. Obtain record facility maps from franchise utilities (PG&E gas and electric, SBC, Cable TV) C. Use additional field survey shots and prepare existing base utilities information as well as augmentation to the base mapping for other key features. D. Use information contained in the preliminary title report, identify record easement information and other potential constraints to the development of the property on the base map graphically. E. Circulate the base mapping for use and comment by District, Master Architect, and others as needed.
