XXII FIG INTERNATIONAL CONGRESS

18
ASPRS Workshops (cont.)
ASPRS WS #4. Alternative Methodologies for the
Development of Accurate Land Cover Data
CANCELLED
ASPRS WS #5. Airborne GPS-controlled Aerial-Triangulation:
Theory and Practical Concepts
Room: Wilson A
8:30 am - 5:30 pm
PDH Hours: 8
CEUs: .8
Dr. Qassim A. Abdullah, Senior Mapping Scientist, EarthData Technologies,
LLC Hagerstown, Maryland
Dr. Riadh Munjy, Professor of Surveying and Civil Engineering at California State
University, Fresno
Dr. Mushtaq Hussain, Professor of Surveying and Civil Engineering at California
State University, Fresno
The workshop will provide the participants with a good understanding of the new
concept of controlling the camera position with a differential carrier phase GPS
receiver to dramatically reduce the amount of ground control required for conventional
aerial triangulation. The workshop will also present design concepts, practical
results, and strengths and shortcomings of the technology. Participants, at the end
of the workshop, are expected to have enough understanding to enable them to evaluate,
design, and/or execute an airborne GPS-controlled aerial-triangulation mission.
I. What is airborne GPS-controlled aerial-triangulation and how does it differ from traditional
aerial-triangulation?
II. Fundamentals of the airborne GPS system.
III. The status of airborne GPS-controlled aerial-triangulation in production today.
IV. Functional system design and requirements for an airborne GPS photogrammetric
system.
V. Flight design and control criteria for successful airborne GPS-controlled missions.
VI. Theoretical consideration of airborne-controlled aerial-triangulation
VII. Practical results and errors analysis.
VIII. Alternate Technologies: the Integrated GPS/Inertial Measurement Technology.
ASPRS WS #6. Performance, Accuracy, and Economics of
Imaging Sensors, Lidar, and Advanced Acquisition Technologies
for Surface Data Generation
Room: Wilson B
8:30 am - 5:30 pm
PDH Hours: 8
CEUs: .8
Mike Renslow, Vice President - Spencer B. Gross, Inc.
Dr. Bryan Mercer, Chief Scientist -Intermap Technologies Corp.
There are a number of existing, as well as planned, imaging and other sensing
systems that are specifically designed for surface data generation. These include
high-resolution satellite imagery, interferometric SAR, Lidar, as well as others.
Surface extraction based on softcopy photogrammetric technology requires digital
imagery as a primary input. Although the source data is usually in the form of
scanned aerial photography, the other acquisition technologies need to be examined
in terms of higher accuracy as well as cost effectiveness.
This workshop tutorial aims at providing a comprehensive understanding of the
technology, accuracy, and performance of various imagery alternatives available
for surface data generation. In addition, the tutorial will examine the economic viability
and cost effectiveness of such data against film-based photography for surface
data generation. These alternatives are such as Lidar, high-resolution satellite
imagery, in-house scanning of aerial photography, and outsourcing scanning
needs. The analysis is applied with a specific set of variables, assumptions, and
a forecasting risk that is within acceptable limits.
I. Background on Image Acquisition Methods
II. DTM Data Generation Techniques
III. High Resolution Satellite Imagery
IV. Lidar, SAR, and Other Technologies
V. Support Technologies: GPS, INS, IMU
VI. Inter-comparison and Accuracy Evaluation
VII. Cost Effectiveness and Scanning of Aerial Photography
VIII. Outlook
Saturday • Half-Day Morning Workshops
ASPRS WS #7. Close Range Photogrammetry for
Building Rehabilitation
Room: Hoover
8:30 am - 12:30 pm
PDH Hours: 4
CEUs: .4
Michael Clowes, English Heritage Metric Survey Team
Clive Boardman, Photarc Surveys Ltd.
The workshop will give an overview on the use of digital photogrammetry as an
aid to architectural conservation work as typically carried out in the United
Kingdom. All of the project data to be shown will have been produced using either
the LH Systems SOCET SET or ISM system software and it is hoped to have a
variety of digital photogrammetric workstations available for ‘hands on’ demonstrations
of the various projects.
A. A review of the application of digital photogrammetric techniques for the survey and
recording prior to the regeneration of sites.
B. The generation of digital elevation models for surface recording and monitoring.
C. The production of orthophotographs for a variety of subjects such as elevations,
mosaics, medieval tiled floors and painted ceilings.
D. The generation of perspective views and flyrounds.
Saturday • Half-Day Afternoon Workshops
ASPRS WS #8. Softcopy Photogrammetry:
Manual Feature Extraction & Automated DTM Collection
Room: Hoover
1:30 pm - 5:30 pm
PDH Hours: 4
CEUs: .4
Claire Kiedrowski, Autometric, Inc.
Jeff Yates, DAT/EM
This workshop will investigate manual feature extraction and automated DTM collection
of using softcopy photogrammetric tools. Discussion will focus on collection
of planimetric and terrain modeling features with an emphasis on current
methods and future trends of 3D mapping.
I. Introduction
A. Mapping timeline
B. Photogrammetry today
C. Softcopy evolution
II. Manual Feature Extraction
A. Project Examples
B. Fundamentals of Softcopy compilation
C. DTM generation from planimetric features
D. Vector collection for GIS usage
III. Automated DTM Collection
A. Automated vs. manual collection
B. Softcopy fundamentals
C. Autocorrelation
D. DTM Collection
E. Project examples, accuracy assessment
IV. Automated Technologies
A. Current Research
B. Challenges
C. Trends