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TRI- VALLEY ORTHO PROJECT 2010 3D 1 WEST Scope of Services Photogrammetry with Digital Mapping Camera The technical methodology will utilize a traditional 100% photogrammetric approach, resulting in high quality contours and orthophotography using imagery from a digital mapping camera. Along with breaklines, supplemental DTM points will be updated or collected to support the contour update. The contour interval for urban areas is 2' and 10' for the Outer Livermore area. Project Planning The Project Manager will meet with the client project team in person to review the project methodology, tasks, deliverables and schedule. All phases of the project will be reviewed in detail to insure client expectations are fully met or exceeded. Upon conclusion of this task, project planning maps will be finalized and a final scope of work will be approved by the client(s). As required, deliverables and costs will be broken down for each project area (City). Surveying Map Control Prior to photo acquisition, survey control points will be premarked to act as part of the map control package. A combination of existing and new points will probably be used. Preliminary plans call for a total of approximately 20 premarked points as well as additional vertical control utilizing non premarked points. In addition to ground surface points, the project will be flown with Airborne GPS (AGPS) resulting in a virtual control point for each exposure point within the overall flight plan. The combination of these two methods will provide the control necessary to meet accuracy requirements for DTM and orthophoto generation. Survey work performed within the project area will be coordinated with the client Project Coordinator prior to work starting. Control point locations and access issues will be discussed and approved to support a smooth and issue free survey. All work will be surveyed by or under the supervision of a licensed California Land Surveyor. The Vice President of 3Di West is a licensed land surveyor in the State of California. Coordinate System: California State Plane, Zone 3 Horizontal Datum: NAD '83 (Spheroid to be specified in Survey Report) Vertical Datum: NAVD '88 Unit of Measure: U.S. Survey Feet Aerial Photography Aerial Triangulation Aerial imagery will be acquired with a high quality digital mapping camera at a suitable photo scale and resolution to support the mapping deliverables. The digital imagery will meet or exceed all industry quality standards for projects of this type and scope. As requested, all photography will be acquired when the sun angle is greater than 35 degrees in the April May time frame of 2010. Special care will be taken to obtain good stereo coverage of the 580/680 interchange and along Interstate 580. Aerial- Triangulation (AT) will be performed to guarantee a high quality fit between imagery, survey control and the resulting contour dataset. The AT will reveal any photogrammetric image fit issues should they be present within the photography or survey control, thus providing a good quality control check for both image and survey data sets. PAGE 2