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HomeMy WebLinkAboutDan Corbin, Inc.-Photogrammetric Consulting Services-02.12.2007 G .a--)a-O7 ne, 7- //3 Photogrammetric Consulting Services for The City of Waterloo, Iowa Photogrammetric Consulting Services INTRODUCTION Dan Corbin, Inc. (DCI) has the expertise to provide photogrammetric consulting services for The City of Waterloo 2007 Digital Terrain Model (DTM) Mapping Project. The City of Waterloo Engineering Department wishes to retain the services of DCI to provide such consultation services. In mutual consideration of the promise set forth in this agreement, it is agreed as follows: PURPOSE The purpose of this contract is to provide professional Photogrammetric Consulting Services to The City of Waterloo Engineering Department as they procure new city wide DTM mapping products. The DTM will be produced from spring of 2007 aerial LiDAR flights flown in conjunction with the Black Hawk County Assessor's 2007 Digital Orthophotography Project. SCOPE OF SERVICES The Black Hawk County Assessor has contracted with Kucera International of Willoughby, Ohio to provide new (2007) color aerial photography and digital orthophotography of Black Hawk County and the municipalities located within the County. In addition to the aerial photography flights, Kucera will be contracting with the City of Waterloo to providing a LiDAR flight of Waterloo from which a digital elevation/terrain model (DTM) with 2ft contour accuracy will be produced. DCI will be performing an independent accuracy verification of the digital terrain model produced by Kucera International for the City of Waterloo. DCI will use the National Standard for Spatial Data Accuracy (NSSDA) to measure and report the horizontal and vertical positional accuracy of the final digital terrain model. The NSSDA provides a step-by-step approach and sound statistical methods for measuring and reporting the positional accuracy of digital spatial data. Briefly, the steps in applying the NSSDA are: 1. Select a set of test points from the data set being evaluated. 2. Select an independent data set of higher accuracy that corresponds to the data set being tested. This document was prepared by Dan Corbin.Inc.for use by The City of Waterloo,Iowa. Page 1 of 3 Photogrammetric Consulting Services for The City of Waterloo, Iowa 3. Collect measurements from identical points from each of those two sources. 4. Calculate a positional accuracy statistic using the NSSDA horizontal accuracy statistic worksheet. 5. Calculate a positional accuracy statistic using the NSSDA vertical accuracy statistic worksheet. 6. Prepare a horizontal and vertical accuracy statement in a standardized report form. A data set's accuracy is tested by comparing the coordinates of points within the data set (Digital Terrain Model) to the coordinates of the same points from an independent data set of greater accuracy. Points used for this comparison must be well-defined. A minimum of twenty test points are required to conduct a statistically significant accuracy evaluation of any given area. The mapping extents for the City of Waterloo will be divided into three areas for testing with 20 test points per area for a total of 60 test points. Two different NSSDA geometric accuracy tests will be performed. The horizontal accuracy will be tested to meet 3.0ft at the 95% confidence level and the vertical accuracy will be tested to meet 1.0ft at the 95% confidence level. In order to meet the NSSDA requirements; field surveyed photo-identifiable test points will be utilized. A separate accuracy statement will be prepared for each accuracy test. DCI will prepare a NSSDA horizontal accuracy statement and a NSSDA vertical accuracy statement for review by the City of Waterloo prior to final acceptance of the deliverables and final payment to the mapping vendor. Kucera International is providing a DTM Pilot Project for review and acceptance by the City of Waterloo. DCI will assist The City of Waterloo with the review of the DTM Pilot Project. Project Cost $ 11,137 Optional Services (if requested) DCI will provide the materials and labor to target the existing ground control stations requested by Kucera International for the DTM mapping. The targets will be placed prior to the spring of 2007 flights and removed after notification. Targeting Cost (14 sites) $1,400 This document was prepared by Dan Corbin,Inc.for use by The City of Waterloo.Iowa. Page 2 of 3 Photogrammetric Consulting Services for The City of Waterloo, Iowa TERMS AND CONDITIONS The services performed for this project will be invoiced as the work is completed. The costs provided in this contract are good faith estimates. DCI will not exceed these costs without previous consent from The City of Waterloo Engineer. In the event the scope of service does change and require additional work; all additional work will be invoiced at an hourly rate of$108 per hour. Payment terms are as follows: Net 15 days - 1.5% per month on all accounts over 30 days unless otherwise specified by the Client at the time of contract. DESIGNATION OF OFFICIALS The City of Waterloo Engineer-The City of Waterloo Engineer is the official authorized to execute any change in the terms, conditions or amounts specified in this contract. DCI-Dan Corbin, President of DCI is the contractor official authorized to execute any changes in the terms, conditions or amounts specified in this contract. LIMITATION OF DAMAGES In the event of the breach of this Agreement by either party, it's agents or employees, or any claim of damages by one party against the other, based on any legal or equitable claim, the parties agree that the amount of damages that may be recovered by any party shall be limited to a sum no greater than the total amount of the payments to be made pursuant to this Agreement. TERMINATION CLAUSE Either party assigned hereto shall have the authority to terminate this contract, by notifying the other party by registered mail within thirty (30) days of the effective termination date. DCI will be paid for the time provided and expenses incurred up to the termination date. SAVING CLAUSE Should any provisions of this contract be deemed unenforceable by a court of law, all of the other provisions shall remain in effect. Dan Corbin, Inc. The City of Waterloo 28 River Ridge Ln Cedar Falls, la. 50613 By Email: dcorbincfu.net Timothy J. Hurley, ayor Ph: (319) 268-1665 Fax: (319) 266-3398 Date P--O'7 By (,1'\Cd,�--- -�s�2 �'l�-� By Dan Corbin, President Nancy Ec rt Clerk Date (o - 7 o 7 Date -) A - 0 7 This document was prepared by Dan Corbin,Inc.for use by The City of Waterloo.Iowa. Page 3 of 3