I am the sole PLS in an aerial mapping company where I am an owner/employee, we have a number of ASPRS Certified Photogrammetrist?ÿ(CP) and Registered Professional Photogrammetrist?ÿ(RPP) in Oregon on staff in addition to my PLS license. I have been asked to give a presentation for in house training (by the RPP's) with suggested topics as follows:
What is:
- NGS
- CORS
- OPUS
- Data collection methods for GNSS (RTK, Static, etc.)
- Post processing methods for GNSS
- Achievable accuracy vs. time spent collecting
- NAVD88?ÿ and GEOID Models
- NAD83 and various realizations
- Oregon Coordinate Reference System (OCRS)
Probably need to add NATRF2022 for sure too.
In other words, they want to know more about my little piece of the world and how it meshes with the overall project flow, this is a good day 🙂
Since the audience isn't surveyors, this is going to be the 30,000 foot view, with about an hour allotted. I am preparing this for sometime next month.
Looking for input from fellow surveyors on potential bullet points that I should highlight, maybe gotchas that you have run across, etc. My purpose is education of other folks in the office that request and receive data from outside survey/engineering firms (contrary to popular belief we only do our own mapping control on a minority of our projects).
I have a pretty good idea of where to go with the presentation, just thought bouncing this off posters here might be good as I get an outline together and start preparing materials.
SHG?ÿ
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That looks like an outline for a college semester, not a 1 hour presentation.
Shelby,
I wish I had kept track of the number of times I prepared a detailed seminar and wound up?ÿhardly using it all.?ÿ Right off the bat?ÿtalk with the attendees and see if you can get a feel for why they signed up for the class.?ÿ Ask them what they expect to learn there.
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Of course we both know if you DON'T have anything prepared you will get the dreaded "blank stare" crowd... ??ÿ
Graphics/pictures?ÿhelp the most with conveying some of these topics.?ÿ Look at the them on the wall and stand in the back of the room where the presentation will be done?ÿto see what is visible and what is not.?ÿ Too many slides have tons of text on them that no one can read from 20' away.?ÿ There is a lot of good graphics out on the internet that convey these topics fairly well.?ÿ NGS has some good ones but some are geared towards a survey centric world that might lose some of the audience.?ÿ If you have an hour leave about 5-10 minutes for questions and plant a?ÿone or two?ÿquestions with some people to open up the audience.?ÿ
One hour? I would have to agree with JaRo that it needs to be cut down. Heck NAVD88, NAD83 and Geoid models would consume an hour easily.
Because you only have an hour, I would recommend selecting a few of the videos from here to have them watch as a prerequisite:
https://www.ngs.noaa.gov/corbin/class_description/NGS_Video_Library.shtml
There are many other recorded presentations on several of the topics on your list here:
https://www.ngs.noaa.gov/web/science_edu/webinar_series/2018-webinars.shtml
Since they requested the presentation, give them some homework to do in preparation.
No possible way to do justice, especially for a non-surveyor (yet with more understanding than most) audience to maybe 2 of those topics, and that would be pushing it, in an hour.
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I gave an all day presentation last year to a large photogrammetric company who is my client. They also had several other offices around the country conferenced in, and overseas people as well. It took the entire day, lots of questions.?ÿ
Thanks all, keep the ideas coming!
I agree an hour isn't much, BUT some things on my initial list just need to be very brief, for example; OPUS is an online method to post process static data, nothing much more than that, I think other things like using Geoidxx with NAD83xx where they were never related requires more education, things like that.
SHG
I work with CPs and LiDAR specialists too, all dealing with Orthophoto, Aerial Triangulation and DEM creation.?ÿ We constantly discuss back and forth the values of reference frames, GSD versus RTK/VRS-RTK Accuracy, Static, etc etc etc.?ÿ?ÿ
I was given the standards from the ASPRS and the USGS to digest and understand what the products they were tasked with so I could better understand what they needed from me.?ÿ Maybe a coffee clatch before the big presentation with the heavy hitters of that bunch to see what they think is relevant to train the remainder of the group.?ÿ?ÿ
An hour is way too much. You will have their attention for about 10 minutes.?ÿ Try to cover what you can in that time and leave the rest for questions.
I would spend it introducing them to the concept of datums (datii?) and reference systems. How "sea level" isn't a single, definable elevation. And how a single point on the earth can have multiple latitude / longitude values.?ÿ?ÿ
On the topic of the relationships between versions of hybrid geoid models and realizations of NAD83, I got tired of trying to explain it and started to write something up. However, I decided to look for something already out there and found the attached, authored by Dave Zenk, NGS Northern Plains Regional Geodetic Advisor. More pre-read homework for your audience.
