Meeting Minutes

September 12, 2014

This is our vendor meeting but I am sure there will be talk about the Napa Quake

Ben Scholes of California Survey and Drafting (Trimble)
Chuck Madrid of Engineering Supply Company (Topcon)
Robert Asher of Intuicom Inc. (cell phone Bridge-X platform)
Jason Paris of Leica Geosystems (Leica)

Northern California GPS Users Group           March 14, 2014           Meeting Notes

Introductions

Janine Hampton - CCCPW with announcements.
CSRC meeting May 1st in San Francisco at PG&E
Mount Diablo Surveyors Historical Society has a raffle off a new Schonstead
CSRC training in Santa Rosa first week of June.
New Geodedic advisor may be coming to California
Height Mod Consortium meeting 2nd Monday of each month by teleconference
NOAA 2014 GPS benchmark campaign

Janine Hampton gave report on Space Weather written by Lee Hixon who is unable to attend.
His information suggests that you shouldn’t do GPS work at Dusk (or Dawn?)

Speaker:
Curtis Burfield PLS
Chief of Survey Standards at Caltrans

Tidal Datum NAVD88 and Coastal Commission Regulations
See Special Publication #135 on line

Outline:
Geodedic datums to be defined by a mathematical model of the earth
Tidal Datums
Tidal benchmarks
Map of Tides and Currents - tidesandcurrents.noaa.gov
Map of tide gauges
Bench mark sheets – zoom to area of interest

VDATUM software  based on geoid has lots of datum conversions – takes a long time to load
Run.jar to start the program – height is zero because this is the datum
Get Lat and Long for your location from Google Earth – this is close enough
Point Conversion – (Port Chicago)
124 05 00
40 50 00
0.0

Next Meeting June 13, 2014

Chairman: Janine Hampton, PLS
Secretary: Duncan Marshall, PLS
Webmaster: Michael D. Jones PLS

______________________________________________________________________________________________________

Northern California GPS Users Group           December 13, 2013     Meeting Notes

Janine Hampton - CCCPW with announcements.

Introductions

Scott Martin – Caltrans – CSRC Representative

  1. CSRC will be having its spring meeting in Northern California May 1st at the PG&E offices in downtown San Francisco.
  2. PBO product TEQC and TEQC Editor can be found at silkworks.com/.
  3. OPUS Projects Training – CSRC is looking for training locations. These classes would be 1.5 days long and would need wifi/router capacity to handle 30 simultaneous connections.
  4. CSRC has a Forum and they want to hear from you.

Greg St. John – CCCSD
CSRC Report

  1. Yehuda’s Ready network earthquake warning system.
  2. Yehuda talked about what makes up the 2011 reference frame.
  3. The CRTN web site has a web site where you can download a Goggle Earth .wgn file. (This will give ALL the base stations in the world shown. There may be a way to get fewer, I just haven’t figured out how.)

 http://www.ngs.noaa.gov/CORS_Map/  
the link is on the right side “Download CORS KMZ”

Tom Taylor – Retired
Can we get CSRC supported by GPS coordinate providers?

Greg St. John – CCCSD
PBO Presentation on how PBO sites are being upgraded with things such as accelerometers.

Dave Murtha – Port of Oakland – Issue for RTK Providers
Dave needs the ability to control whether real time networks switch base stations in the middle of a survey project. So you don’t have some points shot from one base station and other points within the same project shot from another base station just because you got closer to that other base station. (I also experience this issue.)

Scott Martin – Caltrans – Todays Presentation

Supporting an Accessible Geodetic Control Network for California

            GIS is built on the skewers of surveyors control to build their layering such as you would build a hamburger.

            Funding of the CSRC has dropped dramatically over the last few years and the National Science Foundation may stop the maintenance of the PBO stations since they have been built and the science project is now almost complete (?).
There is a large concern that since the PBO stations make up such a large percentage of if the CSRC stations that the CSRC may not be able to continue this part of their work once too many PBO stations fall into disrepair and fail.

Ideas of cost recovery were discussed such as the one suggested by Tom Taylor above.

Scott Martin and his group are interested in spreading his word to other organizations. Contact him if you would like them to give a talk at your meeting.

Duncan Marshall PLS
Secretary, NCGPSUG

____________________________________________________________________________________________________________________________________

Join us for Mari Ikehara's last day as a working stiff!

NCGPSUG     March 8, 2013

Introductions
Marti Ikehara’s last meeting as USGS Geodetic Advisor.

Mark Turner Chief of Surveys at Caltrans gave report of a CORS Station that was stolen. Station Milan.

Rob McMillan from Caltrans talked about why Caltrans uses Trimble equipment.

Bruce Joffee – GIS Consultant – talked about how Geodetic Control points are the toothpicks and surveyors create the control data.
Government boundaries are based on Public Land Survey System.
Trees to follow aerial photo.
Scott Martin is involved with the GIS? CSRC outreach committee.

Marti Ikehara retired as the NGS Geodetic Advisor -  Understand your audience.
SOPAC archives the data.
Last year NGS adopted over 100 CORS stations.
CSRC – stations TIB and WINT are not real time – look at CSRC spread sheet for quotable coordinates.
Marti’s web site has links and KMZ files (for Google Earth).
Is NGS going to have any CORS going real time? Nationally not feasible. Currently mostly at tide gauges. NGS does not want to be responsible for maintaining and distributing real time data.
Accuracy – 1st 2nd and 3rd orders are obsolete to network accuracy by coordinates 2cm or better at 95% accuracy.
Baseline when two points are observed simultaneously
Vector
OPUS Project (using pages in the background) is moving forward and will work as a form of Bluebooking.
NGS is no longer doing leveling. They are working to improve the Geoid to +/- 1cm by 2022. Currently it is at 4cm+/-.
Need to improve your passive control so you can check into it.

How do we get more stations to be real time? Money? Equipment? Volunteer time?

____________________________________________________________________________________________________________________

NCGPSUG     September 14, 2012
Vendors Day

Introductions

Marti Ikehara NGS
Geoid 12A published 9/11/2012
California is not affected going from 12 to 12A
Geoid 9 to Geoid 12 there is an error in the northwest San Joaquin Valley
IGS 2005 to 2008 Change relative calibration to ________ calibration

California Surveying and Drafting – Ben Scholes
Trimble now selling the Pharaoh Scanner

Engineering Supply – Chuck Madrid
New receiver with fence – soon to be tying into national correction

Google nanosecond – Grace Hopper talking about nanoseconds

_____________________________________________________________________________________________________________________

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 - 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

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)

NCGPSUG     March 9, 2012

Introductions

Marti Ikehara – NGS Advisor
Effects of solar flare that occurred earlier this week
Lightsquared article
Comment: Polarizing radio signals on the same frequency

NGS Advisors:
State Advisor
Regional Advisor
NGS is a large portion of the Department of Commerce. Should the NGS be move to the Department of the Interior?

Special Publications
Quad Sheets

RossMacky@noaa.gov – send comments as to why we need a State Advisor.

Locus – Makes it easier to do Blue Book type leveling – you need the data in the correct format.

11/17/2011 North Carolina released the flood plane trying to get everyone on NGVD88

Gauge Datum for NGS is not the same as Station of Guage

Lightsquared CEO Resigned

NOAA – Science and Education Presentations

See/Read Power Point:
RTN Valuation by NGS
Validation of Networks by NGS

DSWORLD – user contributed software
CIGAR – mostly from 2008

NCGPSUG meeting June 8, 2012

John Wilusz, Senior Engineer, DWR, Sacramento, will offer a talk about the Sacramento-San Joaquin Delta Height Modernization project that he is presenting later at an FMA (Floodplain Management Association) conference. Scott Martin and Marti Ikehara will supplement his presentation with more detailed information.

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

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

-----
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


Telephone: 

650-348-7247

 

800-462-8181 (in CA)

Fax:

650-348-0502

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

 

 

 

 

Old meeting minutes

last updated 2014-10-14