Thursday, May 31, 2007

Workshop on Photogrammetry

Janet Lowe has been in contact with Gary Thompson at NC Geodetic Survey ( about offering a workshop on photogrammetry for those who will be working with or running ortho projects for their organization. Instructors have been assembled from across the state to help teach local governments more about the photogrammetry process, new technologies, standards, etc.

Dates and locations of the workshops will be as follows:
1. July 18: Asheville, NC at the City of Asheville Public Works building.8:00 a.m. - 4:00 p.m. Contact Janet Lowe ( or Jason Mann (
2. August (first or second week): East Carolina University, GIScienceCenter (Greenville, NC). 8:00 a.m. - 4:00 p.m. Contact Karen Mulcahy( or
3. October 2-3: Raleigh, NC (in conjunction with the NCPMA conference).Contact Gary Thompson (

1. Lunch is NOT provided, -- although if someone wants to help provide, that'd be wonderful.
2. Agenda: Draft agenda is listed below. If you have suggestions on othertopics that may be of interest, please contact Gary Thompson.
3. Photogrammetry concepts: collinearity, orientation, resection, intersection, and aerotriangulation
4. Photogrammetry systems: film cameras, scanning, digital frame cameras, and digital time dependent cameras
5. Geodetic control: NCGS GPS CORS, ground GPS surveys for photo control and check point control, GPS IMU systems for cameras, and NAD 83(NSRS2007)
6. Elevation data: LIDAR compilation vs. LIDAR-photogrammetric compilation
7. Orthophoto production processes: rectification versus orthorectification, mosaicing, tiling, and pixel resolution
8. Image formats and techniques: TIFF, MRSID, compression, overviews, and tiling
9. Data storage options
10. Quality Control (QC) concepts: geometric accuracy, elevated structure distortion, edge match, and tone balance Selection processes: Qualifications-Based Selection (QBS) vs. bidding

Attendance: Hosts of the meeting will work with Gary Thompson to ensure that you receive credit as needed (certificate of attendance) for ongoing professional education. This seminar will count as 6.5 PDHs. Please contact hosts to let them know of your attendance, so we have an accurate head count.

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