After being active in the geomatics industry (mapping, surveying, GIS) for many years, and
having to explain the same things many more times, I decided to make that information
available to the geomatics industry. I hope that you will find it useful.
Each one of the 15 videos below is 1 to 1.5-hours long. They are available for purchase and
download (yes, you keep them forever - like a book - based on the honor system) because of
the lasting technical content that you may want to revisit down the road (the recorded format
allows you to do that).
As a sampling of what is covered, consider the following questions:
Click the PDF link below for a complete course description:
THERE ARE 15 SESSIONS:
(Klick on one of the blue buttons that will take you to the corresponding payment window)
SESSION 1. TRIGONOMETRY REFRESHER. This session will make sure that you are ready for the other sessions.
Surveyors use trig in a special way. Learn about bearings, azimuths, etc.
SESSION 2 - COORDINATE SYSTEMS AND TRANSFORMATIONS. Inserting one dataset into another is done with
trasformations. However, a lot can go wrong, including the deformation of databases. Learn how to avoid that.
SESSION 3 - LEAST SQUARES CONCEPTS. Long used in statistics, this tool is key in transformations, for example.
Learn how to use it and how to read the results.
SESSION 4 - GEOIDS. Where do elevations come from? Learn how gravity is king.
SESSION 5 - ELLIPSOIDS. These mathematical models of earth are the basis for all positioning. Learn how.
SESSION 6. GPS. What does GPS actually measure? How does it achieve accuracy?
SESSION 7 - PRECISION AND ACCURACY. Mapping is full of accuracy or precision statements, but who knows
what they mean? How does one communicate this properly when talking about data bases?
SESSION 8 - PROJECTIONS. This foundation for all local, national and world-wide positioning efforts eludes
many. However, it is not that complicated.
SESSION 9 - PROJECTIONS MATH. A look behind the scenes of projections helps strengthen an understanding of
what is being achieved mathematically.
SESSION 10 - HORIZONTAL DATUMS. A datum is the origin of a reference system. Horizontally, they normally
refer to some geographic position. Learn how they relate to various projections.
SESSION 11 - VERTICAL DATUMS. Datums also exist vertically, for elevations. See how.
SESSION 12 - PLSS AND GIS. Any legal description of land parcels requires a statement abouts its position within
the Public Land Survey System. This is needed in GIS, surveying and engineering.
SESSION 13 - LIDAR. It is used to collect and process point clouds that are employed by many communities
for planning and project management. See how.
SESSION 13 - PHOTOGRAMMETRY 1. The use of aerial photography is used extensively for interpretation of
conditions on the ground, or the precise mapping of ground detail. Whether this is done from the ground,
from drones or from airplanes, the principles are the same.
SESSION 15 - PHOTOGRAMMETRY 2. This session gives and insight into the more technical aspects of the science.