Pre-Conference Workshops
Sunday, June 2 | Morning Sessions
8:30 am – 11:30 am
Ground Truth Workshop: Design of Low Distortion Projection Coordinate Reference Systems
Presenter: Michael Dennis, NGS
Map projections are always distorted. Like death and taxes, it is a Fact of Life. Linear distortion is the type of concern here: the difference between true horizontal “ground” distance and its projected representation. This difference often exceeds 1 foot per mile (19 cm/km) for State Plane and other projected coordinate reference systems (PCRSs). Such distortion can be problematic for various geospatial products and services, including engineering plans, survey plats, construction staking, as-built surveys, and facilities management. Although linear distortion cannot be eliminated, it can be minimized using “low distortion projections” (LDPs).
This workshop shows how to design LDPs that achieve optimal performance, even for relatively large areas with variable topographic relief. The design procedures are consistent with those used for developing the State Plane Coordinate System of 2022 and are based on the same conformal map projections: Lambert Conformal Conic, Transverse Mercator, and Oblique Mercator. Using these existing map projections makes LDPs compatible with engineering, surveying, GIS, and CAD software. Because LDPs are rigorously georeferenced, they can be used directly in such software to represent conditions “at ground” while coexisting with data in other PCRSs. In that way, LDPs allow you to have your cake and eat it, too.
Additional Ticket Purchase Required
- Registration Fee: $150 each or $225 am / pm package
- Student Registration Fee: $25 each or $40 am / pm package
8:30 am – 11:30 am
Fundamentals of Surveying: FS Exam Prep
Presenter: Humberto Gallegos, East LA Community College
This workshop will be a review course for the fundamentals of surveying exam. The workshop will review common content and questions that typically appear on the exam.
Additional Ticket Purchase Required
- Registration Fee: $150 each or $225 am / pm package
- Student Registration Fee: $25 each or $40 am / pm package
Sunday, June 2 | Afternoon Sessions
1:30 pm – 3:30 pm
A Road Trip with the Lost Surveyors of Oregon
Presenter: Pat Gaylord, David Evans and Associates
Join this workshop to take a virtual road trip around Oregon and explore surveying’s contributions to the names and history of the state of Oregon. The material will draw from the Lost Surveyor column published bi-monthly in The Oregon Surveyor:
Additional Ticket Purchase Required
- Registration Fee: $150 each or $225 am / pm package
- Student Registration Fee: $25 each or $40 am / pm package
1:30 pm – 5:30 p.m.
Practical Approach to Using the ASPRS Positional Accuracy Standards for Geospatial Data
Presenter: Qassim Abdullah, Woolpert
This workshop provides an in-depth look at the ASPRS Positional Accuracy Standards to categorize positional accuracy of products derived from digital aerial cameras, manned and unmanned aerial systems, and all types of lidar including terrestrial, mobile, and airborne. The workshop will explain the basis for each accuracy measure adopted in the standards. Instructors will demonstrate practical application of these standards using a web-based application deployed by Esri.
Additional Ticket Purchase Required
- Registration Fee: $150 each or $225 am / pm package
- Student Registration Fee: $25 each or $40 am / pm package