Meeting Minutes

Preliminary Minutes

NCGPSUG Meeting December 9, 2011

Chairperson:
Janine Hampton PLS jhamp@pw.cccounty.us
Secretary: Duncan Marshall, PLS secretary@ncgpsug.org
Alternate Secretary: (None elected/volunteered)
Committee for Speakers: Bruce A. Joffe, GISP, AICP
Web Master: Michael Jones - mikejones@phsurveys.com Valley Springs - from the CLSA Central Valley Chapter
If you have suggestions for things to be shown on the web site, please contact Robert.
Advertising is one idea to pay for our annual $60 web site fee. Advertising at the end of the email announcements for the meetings and meeting notes. Other Ideas? In the past we have passed the hat at meetings.
If you are interested in joining the Committee for Speakers or making suggestions for speakers please contact Neil King mailto:nking@photoscience.com or Duncan Marshall at secretary@ncgpsug.org

Introductions:

Announcements:

Speaker:

NGS – Marti Ikehara - marti.ikehara@noaa.gov

• Marti gave a demonstration of DSWORLD. She is very happy with what this will do. This program works with Google Earth, which needs to be installed first. You can search for DSWORLD and install it from the NGS web site.

http://www.ngs.noaa.gov/PC_PROD/PARTNERS/index.shtml
pick on the words DSWORLD (Version 2.10)
“Open”
“Setup”
After installation pick “Tools” popdown and “Update Program” to be sure that you have the latest version.

This program will allow you to export NGS data to Google Earth and Submit many forms of data to NGS.

For instance you can distinguish between Vertcon and non-Vertcon (datatype choice is called (NAVD88 only") benchmarks.
Stations popdown – State and County –
STATE: CA
COUNTY:  ALAMEDA
TYPE:  VERTICAL – NAVD88 ONLY
STABILITY:  0-Ant Stability

To Continue, Pick the blue and white NOAA symbol in the bottom center of the screen. This will start Google Earth and you should see the symbols geographically in Alameda County

If you look at Google Earth, you should see that DSWORLD has placed the monuments/benchmarks in the “Places” column under “Temporary Places”. If you want them to be a permanent part of your Google Earth program you need to move them above the words “Temporary Places”.

You can also use DSWORLD to submit recovery reports to report a monument/benchmark found or destroyed.

When searching for a benchmark, remember the space in the name. F 1087
Read help on taking photos before going to field.
Photo names must start with a point ID.

Example:
LV0248-F 1087-1-20110926.JPG
LV0248-    F 1087         - 1                              - 20110926            .JPG
PID            STAMPED   TYPE OF PHOTO     PHOTO DATE   
(CLOSE UP)

Can we sort by epoch?

Geoid 11

Antenna Model has changed

Mathew Coleman - mcoleman@photoscience.com
PhotoScience – formerly HJW

Lidar – Light Detection
Limited by elevation over terrain.
Don’t want laser too close to the object being scanned
Laser doesn’t pick up water – shows it as black
Bathemetric – 30-40meters deep
Max PDOP of 3 for 1 foot contours
Preplanning weather airspace ground point locations
1meter spec vs 10 meter spec
USGS VIS(?) spec (in discussion) for Lidar specs
Vertical accuracy is harder on sloping and irregular terrain.
.les file
QT moddler
Viewer – LDV from US Forrest Service
Quick Terrain Reader – may have decimeter
Bare earth model which can be used for tin creation
Lidarnews.com

Next Meeting March 9th

Update your local control online
Check CSRC for online cell phone connections

• New Service – Sign up to get NGS news updates
• Published CORS coordinates Published CORS coordinates for over 1800 CORS sites referenced to IGS08 epoch 2005.00 and NAD83 2011 epoch 2010.00.  Because of the change in IGS08 definition, the new coordinates were done using absolute antenna calibrations versus relative antenna calibrations in previous realizations.  Warning not to mix relative and absolute antenna coordinates.
• Because of the new realization of NAD83, a new national adjustment is underway so that coordinates for passive stations will be referenced to the new CORS realization
• New network accuracies will be available when the 2011 passive readjustment is published probably early next year, and new to the datasheets will be a link to all the local accuracies, indicating the adjacent stations that were observed (have ties)
• OPUS update – OPUS now offers a choice of coordinates. Warning not to mix relative and absolute antenna coordinates.
• IGES08 epoch 2005
• NAD83 2011 epoch 2010.00
• Local accuracies link available by the end of 2011 so passive stations will match CORS
• This leads to a new geoid model to work with NSRS – Release date 2012
• Marti recommends that you install the software DSWORLD. This program works with Google Earth, which needs to be installed first. You can search for it and install it from the NGS web site. (Looks pretty good) and will distinguish between Vertcon and non-Vertcon (datatype choice is called (NAVD88 only") benchmarks.
• If you want to submit a destroyed monument to the NGS, please do not send the physical monument.  Instead use the Submit tab of DSWorld, which requires 1-2 digital photos of the monument, after it's destroyed.
• Marti likes your feedback, so please send her some.
• Other News From Marti – Jim Harcharik from the Caltrans Sacramento office is moving back to District 1.

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There was discussion about the radio frequency for RTK work being narrowed from 25 KHz to 12.5 KHz. We hope to have a flier up on our web site for further information

Call to All Members – As a courtesy to our lecturers!
We need a list of sight seeing locations, restaurants, wineries, hotels, directions to/from CCCPW from all 3 bay area airports, maps etc for our guest lecturers. Especially if they are from out of town!

Vendors Participating:

Altus Positioning Systems
Nick LaFond, LSIT
Sales Manager - Western US
ALTUS Positioning Systems
+1.310.541.8139 x228 office
+1.310.947.1810 cell
+1.310.541.8257 fax
nick.lafond@altus-ps.com
http://www.altus-ps.com/

Leica Geosystems Solutions Center
1447 Rollins Road
Burlingame, CA 94010
Hans Haselbach
hanshaselbach@comcast.net

Trimble
California Surveying and Drafting Supply
6701 Sierra Ct. Ste. E
Dublin, Ca. 94568
Tel: (925) 960-0323
Toll Free: (800) 243-1414
Fax: (925) 556-0150
Hours: M - F 8am to 5pm
Ben Scholes
ben@csdsinc.com
Ed Morrison
ed@csdsinc.com

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