cost estimates a mix of quotes and extrapolations estimating state wetland delineation costs in...

Cost Estimates

A Mix of Quotes and Extrapolations Estimating State Wetland Delineation Costs In Vermont

David Brotzman

VCGI

Aug. 3, 2006

Photo Scale vs. Mapping Unit

Photo Scale vs. Target Mapping Unit 1:80,000 = 3-5 acres 1:58,000 = 1-3 acres 1:40,000 = 1 acre 1:24,000 = 0.25-0.50 acre 1:12,000 = 0.10 acre

* Per Ralph Tiner

Photo Scale vs. # of Photos

Scale # of Photos/Quad #Photos/VT*1:80,000 1 1601:58,000 1.5 2401:40,000 4 6401:24,000 20 32001:12,000 42 6720

*Estimates based on 58 sq. mi/quad and Vermont land surface area.

May be approx. 220 quads (1:24K) covering the state**Per Ralph Tiner

Scale Rhode Island Vermont 1:40,000 $110,000 * 111.1 ft. accuracy1:24,000 $18,000 $204,000 * 66.6 ft.accuracy1:12,000 $45,000 $499,000 * 25.0 ft. accuracy1:5,000 $164,000 $1,006,000 # 10.41ft. accuracy1:1,250 $14,077,600 #

Cost Estimates

Aerial Imagery Acquisition Only

* Estimates from NRCS/FSA (2003) for CIR Hardcopy

# Rough Estimates from VMP for digital Orthos

Cost Estimates

Satellite -Digital Globe Vermont

1:12,000 $637,667 23 meter CE (accuracy)1:4,800 $677,280 23 meter CE (accuracy)

Quickbird Satellite CIR Imagery

Prices from the latest Price Sheet

Cost Estimate

Scale Rhode Island Vermont (A) 1:40,000 $1,600,0001:24,000 $438,305 $3,418,7791:12,000 $865,810 $6,753,3181:5,000 $1,907,005 $14,874,6391:1,250

Labor Only

Blue numbers (VT) extrapolated from RI

(A) multiplier is 7.8 (RI vs. VT area)

Cost Estimates

Scale Rhode Island Vermont (B)1:40,000 $1,750,0001:24,000 $494,305 $3,460,1351:12,000 $953,810 $6,676,6701:5,000 $2,185,005 $15,295,035

Full Data Collection – Using Aerial Imagery

Blue numbers (VT) extrapolated from RI

(B) multiplier is 7.0 (RI vs. VT area)

Confidence Are These Numbers Sane ? Standard Estimating Procedures Were Used Maybe 20% Give or Take Not 50% Out of Line Only a Funded Cost Estimating Effort Can be

Fully Trusted

Mapping Unit to Cost Estimate

1:80,000 = 3-5 acres 1:58,000 = 1-3 acres 1:40,000 = 1 acre 1:24,000 = 0.25-0.50 acre 1:12,000 = 0.10 acre

*Assumes New Imagery Acquisition

= ?

= ?

= $1,750,000

= $3,460,135

= $6,676,670

Options Get Other Agencies Involved In Imagery Buy

NRCS, FSA, VT Fish and Wildlife, etc. Private Sector

Sanborne Mapping – Automated CollectionSeriously Consider an RFI

Still Need To Purchase CIR Imagery Imagery Is Not Your High Cost ItemYou Can Get Help