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WELCOME

LOCATIONS9659 W Grand Ledge9659 W Grand Ledge9659 W. Grand Ledge 9659 W. Grand Ledge

HwyHwySunfield, MI 48890Sunfield, MI 48890888888--374374--1670 T1670 T517517--566566--8000 F8000 FDsauersjr@aerocon.comDsauersjr@aerocon.com

4515 Glenbrook Road4515 Glenbrook RoadWill hb Ohi 44094Will hb Ohi 44094Willoughby, Ohio 44094Willoughby, Ohio 44094800800--717717--1342 T1342 T440440-- 946946--2646 F2646 F

www.aerocon.comwww.aerocon.com

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PHOTOGRAMMETRY“Photogrammetry is the art, science, and technology of obtaining reliable

information about physical objects and the environment through the processes of recording, measuring, and interpreting photographic

images (ASPRS)images. (ASPRS)

PROJECT PLANNINGProject Type

AccuracyAccuracy

Feature Detail

Contour Interval

Mapping Limits

Customizable to YOUR Layers and Symbols

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Map Scale Planimetric Accuracy for Well-Defined Points limiting RMSE (feet)

ASPRS Class 1 NMAS ASPRS Class 2

1"=20’ 0.2 0.30 0.4

1”=50' 0.5 0.75 1.0

Horizontal Accuracy Table

1"=100' 1.0 1.5 2.0

1"=200' 2. 3.0 4.0

1"=400' 4.0 6.0 8.0

1"=800' 8.0 12.0 16.0

Target Scale” = x ft. ASPRS Class 1 NMAS ASPRS Class 2

50 1"=350' 1"=375' 1"=400'

100 1"=700' 1"=750' 1"=800'

200 1"=1,400' 1"=1,500' 1"=1,600'

400 1"=2,800' 1"=3,000' 1"=3,200'

Topographic Elevation Accuracy RequirementsFor Well-Defined Points

ASPRS Limiting RMSE (ft)Target

C t B kli /C t S t DTM El ti P i t

Vertical Accuracy Table

ContourInterval

Breaklines/Contours Spot or DTM Elevation Points

ft. ASPRS Class 1 NMAS ASPRS Class 2 ASPRS Class 1 NMAS ASPRS Class 2

0.5 0.17 0.25 0.33 0.08 0.12 0.161 0.33 0.495 0.66 0.17 0.25 0.332 0.67 1.0 1.33 0.33 0.5 0.675 1.67 2.5 3.33 0.83 1.25 1.67

TargetContour ASPRS Class 1 NMAS ASPRS Class 2ContourInterval

ASPRS Class 1 NMAS ASPRS Class 2

½ 1"=167' 1"=175' 1"=183'1 1"=333' 1"=350' 1"=367'2 1"=667' 1"=700' 1"=733'4 1"=1,333' 1"=1,400' 1"=1,467'

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Phases to the Mapping Process

Flight Planning / Aerial Photography

Ground Control Survey

Aerial Triangulation / Stereomodel Setup

Stereomodel Digitizing

Cartographic Editing

Digital Orthophotography

AERIAL PHOTOGRAPHY

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AERIAL PHOTOGRAPHY

30 + degree sun angle30 + degree sun angle

No cloud cover

Leaf-off vegetation

No snow cover

Nov. – Apr. Acquisition

CAMERA SYSTEM

FILMFILM

FMC

ABGPS

Calibration

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GROUND CONTROL

Accurate well placed ground control is an essential Accurate, well placed ground control is an essential element for photogrammetric projects.

Two standard types of ground control pointsPhoto Identifiable PointsPre-marked Targets/PanelsPre-marked Targets/Panels

Advantages / Disadvantages

TARGETED GROUND CONTROL

CONTROL STATION REFERENCE SHEET

Project # 9274 Project Name: SUGAR CREEK BOROUGH Quad: FRANKLIN City / Twp: FRANKLIN / SUGAR CREEK County: VENANGO State:___PA____ Set By: KDZ Year: 2003 Type of Monument: PK NAIL Project Supervisor: KDZ

Horizontal Control: - Method:

NAD 83/86 Traverse Vertical Control: - Method:

NAVD 88 X Total Station

NAD 27 GPS/RTK

NAD 83/92 X GPS/STATIC X

Other:_____________ SPCS Zone:PA NORTH____

Order: 1 st

NGVD 29 Levels

Assumed GPS / RTK

Other:_____________ GPS / STATIC X

Order: 3 rd

Station Name / Number:_____SC29________________ Companion:

Latitude (N) :_____41 24 14.77993_____________

Longitude (W): 079 48 13.39313

Convergence: _____-1 21 31.02_____________

Scale Factor: _____0.99995687______________

Elevation Factor: _____0.99995724______________

Combined Factor: 0.99991411

North (y) US feet:____457539.076________________

East (x) US feet: ___1405157.968________________

Elev. (z) US feet: 1003.854

North (y) meters: _____139458.189____________

East (x) meters: ______428293.005____________

Elev. (z) meters: 305.975

To Reach: From the intersection of SR 62 and SR322 in the east side of Franklin, proceed northeast on SR 62 for 1.25 miles to an open area on the left just south of the entrance to the KFC restaurant and the station located in the southwestern part of parking lot.

Aerocon Photogrammetric Services, Inc. 4515 Glenbrook Road Willoughby, OH 44094 Tel (440) 946-6277 Fax (440) 946-2646

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PHOTO ID GROUND CONTROL

SETUP & MEASURE CONTROL

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Corridor Mapping Control Plan

Digital Planimetric Mapping

Feature Collection

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DTM/DEM Surface Generation

Mass PointsMass Points1”=50’ – 25’ GRID

1”=100’ – 50 ‘ GRID

Auto CorrelationBreaklinesContours

Spot Height Elevations

Cartographic Edit / QA QC

Customized to Client CAD Standards& Software Formats

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Digital Orthophotography

Digital Imagery, Aerial Triangulation, DEM/DTM

Triangulated Irregular Network

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Orthophoto Draped Over TIN

Helicopter Mapping

1”=20’ scale mapping0.5’ contours

+/- 0.05’ accuracy on hard surfaces

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Corridor Mapping

Plan & Profile Sheet

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THE END

THANK YOU