Parent Layer: Sausalito Elevation Contour

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Description: GeoWing worked with the City of Sausalito Public Works Department to define the project goals and schedule. The work was directed by Jonathon Goldman, PE, QSD, CFM, Director of Public Works, City Engineer, and ADA Coordinator. The City's Project Manager for the project was Jill Barnes, PE. The project contract was signed and the notice to proceed was provided on January 31, 2017 in the City's office at 420 Litho Street in downtown Sausalito, CA.Ground Survey: Ground survey services were provided under separate contract to the firm of Linda A. Carruthers & Associates Land Surveyors of Sausalito, California (Carruthers). The surveyor in charge of the survey for this project was Linda A. Carruthers. Carruthers surveyed 31 primary control locations for the project and 3 base stations. Carruthers surveyed 15 check locations. Carruthers reports the following information on the datum and coordinate system for this project:Horizontal Datum: NAD83(2011) 2010.00 EpochVertical Datum: NAVD 88Geoid: GEOID 12A yes, but the NAVD88 Heights are not based on EH+GH, they are based on leveled ortho heights combined with Geoid12B and delta EHCoordinate System: CA SPC Zone IIIUnits: US SURVEY FEETNote: Epoch 2017.2 was adusted to the City of San Francisco 2013 High Precision Network (SF HPN) survey epoch 2013.65 and adjusted down to epoch 2010.Lidar Acquisition: GeoWing subcontracted aerial lidar acquisition to Eagle Mapping of Portland, Oregon (Eagle). Eagle operates their flight operations out of their Vancouver, BC, Canada office. Eagle utilized a Riegl Q1560 lidar instrument on this project.Aerial Acquisition: GeoWing subcontracted aerial acquisition to SkyIMD of Richmond, CA. Acquisition was performed using a fixed-wing Cessna aircraft equipped with a Phase One RS-100 with a calibrated camera lens.Processing: All processing was performed by GeoWing personnel using Pix4D Mapper, Agisoft, LP360 Advanced, Autodesk AutoCAD 2013, and ESRI ArcMap 10.3 processing software. All data products were delivered on or before 7/28/17.Deliverables: Breaklines - in AutoCAD dwg format - delivered in tiles and in one file.Digital Terrain Model (DTM) - Civil 3D AutoCAD (in 2015 and 2017 versions of Civil3D) - 1' grid spacing and breaklinesDigital Terrain Model (DTM) - ESRI GRID format - 1' grid spacingLidar Point Cloud - Digital Surface Model (DSM) in ASPRS LAS format - classified to ground and non-groundOrthophotography - Color orthorectified imagery delivered in tiles in TIFF format with tfw georeferencing - 0.1' GSDRaw Data - Imagery, lidar swath data, and lidar trajectoriesReports and Metadata - Accuracy Report, Acquisition Reports Lidar and Imagery, Aerotriangulation Report, Lidar Processing Report, and MetadataTiles - shapefiles of the tile layouts for the lidar, ortho and the ESRI Grid dataVisualizations of Data - screen shots of the various data files saved in PNG formatNote: Ground Control Data - copied from the deliverables of the Land Surveyor under separate contract - Linda A. Carruthers & Associates Land Surveyors of Sausalito, California.

Copyright Text: Contract Lead: Jonathon Goldman, PE QSD CFM Director of Public Works, City Engineer and ADA Coordinator City of Sausalito 420 Litho Street Sausalito, California 94965-1933 [email protected] direct: 415-289-4176 fax: 415-339-2256 www.ci.sausalito.ca.us Project Manager: Jill Barnes, PE Project Manager [email protected] 415.738.5330 Aerial Survey/Mapping Project Management Lead: Becky Morton, CP, CMS President GeoWing Mapping, Inc. 71 Stevenson Street, Suite 400 San Francisco, CA 94105 415-655-6878 [email protected] Surveyor / Ground Control: Linda Carruthers Linda A. Carruthers & Associates Land Surveyors PO Box 2053 Sausalito, CA 94966 [email protected] 415 332-3912

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