Corporate Headquarters Phone: 719.593,0093
ee pee 1935 Jamboree Drive Toll-Free: 1.866.726.2676
— OC r) h rm rn Suite 100 Fax: 719.528.5093
cau LA c | ft Sue q Colorado Springs, CO 80920 www.sanborn.cam
March 5, 2019
Mr. Jayson Brennen, GISP
Vice President
CDM Smith
670 N. Commercial St, Suite 208
Manchester, NH 03101
P/F 603.222.8323
brennenjd(@cdmsmith.com
Re: Revised Proposal for Orthoimagery and Photogrammetric Mapping Project, City of Nashua, NH
Dear Mr. Brennen:
The Sanborn Map Company, Inc. (Sanborn), understands that the City of Nashua, NH (the City), is seeking to
engage the services of a professional mapping company to provide digital orthophotography and photogrammetric
mapping services. Sanborn has the personnel, equipment, knowledge, and experience to successfully complete the
required tasks, and we are pleased to present our proposal. This revision of the proposal separates the acquisition
cost from the remainder of the fees; removes the 4-inch spatial resolution option, since the 2-inch spatial resolution
option has been selected; includes the addition of the project schedule; adds a summary list of the planimetric
features; delineates a Phase I and Phase IT in both the schedule and the payment terms; and updates the schedule
dates.
Statement of Work
@ Project Area: The area of interest (AOI) for the project is understood to be that within the legal boundary of
the City, consisting of approximately 31.7 square miles
= Georeferencing: New Hampshire State Plane Coordinate System NAD83 (U.S. Survey Feet), latest revision.
Vertical datum NAVD88. Combination of ABGPS/IMU and ground control
= Acquisition Conditions: Spring 2019, snow free, leaf-off
Digital Orthophotography
« Spatial resolution = 2-inches
« Spatial accuracy = 2 pixels RMSE per ASPRS Positional Accuracy Standards for Digital Geospatial Data
(EDITION 1, VERSION 1.0 - NOVEMBER 2014)
* Spectral resolution = 4-band RGB/NIR
= Radiometric resolution = 8 bits per channel
* Digital Elevation Model (DEM) developed from imagery through autocorrelation
» Delivery in TIFF/TIFW and MrSID file formats
@ Planimetric Mapping
" Stereoscopic data extraction of features — summary lst provided in Table { below
« Spatial accuracy equal to 2-inch GSD orthotmagery
«Feature list per specification/as provided to Sanborn
® Delivery in Esri File Geodatabase format
Quote-Budgetary Estimate Letter Ternplate v3; 11/7/17 Page Lof3
