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TRI-VALLEY ORTHO PROJECT 2010 3D WEST Scope of Services Mapping Once the imagery has been controlled, 3Di West will review the imagery in stereo to identify areas of change within the surface model which have occurred since the contour DTM was last updated. These areas of change will be provided to the client for review. Each City will need to provide a full three dimensional DTM consisting of terrain break lines and mass point spot elevations to 3Di West from their last contour mapping project in 2005. These data sets will form the basis for the DTM update being performed by the consultant using the new 2010 imagery. Areas of change within the DTM will be photogrammetrically updated to meet the contour accuracy for the particular area being mapped. Urban Areas 2 foot contours with supporting DTM Livermore Rural Area 10 foot contours with supporting DTM The updated DTM will be created to provide a seamless DTM across City boundaries, with seamless generation of new contours. All photogrammetrically collected data sets would be delivered in standard AutoCAD and /or ESRI ArcGIS formats per client requirements. Each city will receive DTM, contours and ArcGIS Terrain Data Set (TDS) as one contiguous file for each City area. The City of Livermore will also receive a set of digital map sheets for DTM and contours; the other two cities will not. Orthophotography Post processing of all imagery will take place in our Eugene, Oregon office by an experienced in -house team. All stages of production work will be closely supervised and QC'd by our department manager who has over eight years of ortho production experience. High quality color and color IR orthophotography will be generated for the different project areas at 0.5' for the urban areas of Livermore, Dublin and Pleasanton and 1.0' for the Livermore expanded area of interest. All orthophotography will be generated using custom image seam lines for superior fit and appearance. Imagery will be color balanced to present a "one- image" type appearance across the project area. Orthophotography will be generated using the custom DTM /DEM produced for this project. The orthophotography will be delivered in both uncompressed (TIF/TFW) and compressed (SID /SDW) formats for both the color and color IR versions. An overall mosaic of the entire project for each image data set will be delivered at a 1.0' pixel resolution in SID /SDW format. Final imagery will be delivered to the client on standard media such as a USB 2.0 external hard drive. The orthophotography tiles will be based upon an agreed upon tile layout with complete tiles produced within the project areas. In addition to color and color IR imagery, we will provide a complete grayscale copy of the orthophotography for the Livermore project areas to the City of Livermore at no additional cost per the RFP. Recommended target compression ratios for the MrSID orthophotos are 15:1 or 20:1. PAGE 3