City of Pismo beachHorizontal and Vertical Control Network
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Transcript of City of Pismo beachHorizontal and Vertical Control Network
CITY GOALS - Expedite The Flow of Geodata to the Public by:
• Establishing horizontal and vertical positions on newly established benchmarks throughout the City of Pismo Beach.
• Provide benchmark information to the Public via hard copy and as a GIS layer.
• Incorporate new Geodata from the private sector into the City of Pismo Beach's GIS.
• Use current staff to minimize cost.
CITY OF PISMO BEACHHORIZONTAL AND VERTICAL CONTROL NETWORK
HORIZONTAL AND VERTICAL CONTROL NETWORKS
Past GPS Surveys – Santa Maria Valley GPS Network
4 Survey Crews4 GPS ReceiversCommunications between Crews and Setup -
CRITICAL1 ½ hour GPS Static SessionsMission Planning for GPS observationsNightime OperationsStatic Session on Known HPGN Control
Monuments½ Million Dollar Investment - 1996
20 YEARS AGO
DELIVERABLERecord of Survey
OBJECTIVESSURVEY TEAM GOALSDefendable, Accessible, Reliable - DAR
• Utilize existing standards and best practices in the Science of Geomatics, Traditional Land Surveying, and GIS Mapping to produce High Quality mapping deliverables. • Utilize technological advances in GPS and available online information for locating and measuring points on the surface of the earth – CGPS/CORS data & RTN networks.
• Provide Primary Control tied to the latest Horizontal and Vertical Datums using California standards for GPS measurements. (45 points total)
• Provide Secondary Control tied to newly established Primary Control using NGS standards governing RTK/RTN procedures. (145 points total)
• Provide Efficient and Cost Effective services and data to the City of Pismo Beach.
www.AGLSurveys.com
MAPPING & DATUMSHorizontal Datum
Horizontal accuracies to comply with California Public Resources Code 8856 having a positional accuracy of two centimeters or better.
Benchmarks and GIS mapping referenced to the California Coordinate System 1983, CCS83, (epoch 2011), Zone 5.
Vertical Datum
Vertical accuracies to comply with California Public Resources Code 8858 having a positional accuracy of five centimeters or better.
Benchmarks and GIS mapping referenced to the North American Vertical Datum of 1988 (NAVD88) through ties to established local benchmarks within the City of Pismo Beach.
GIS Data
GIS Layer containing the newly established benchmark locations incorporated into a geodatabase along with attributes with spatial links to field notes and digital imagery for each point.
TECHNIQUES AND EQUIPMENT USED
Primary Control
Primary benchmarks observed for 30 minutes using Trimble R8 model 3 GNSS receiver and post-processed using Trimble Business Center software version 2.5 along with CORS stations USLO, P516, and P513 .
Least Squares adjustment processed using Trimble Business Center software version 2.5; Residuals printed and included in the surveyor's report.
45 Primary Control Points Located.
TECHNIQUES AND EQUIPMENT USED
Secondary Control
NGS Field Guidelines for RTK/RTN GPS measurements followed. http://www.ngs.noaa.gov/PUBS_LIB/NGSRealTimeUserGuidelines.v2.0.4.pdf
Secondary benchmarks observed for (two) 3 minutes occupations using Trimble R8 model 3 GNSS receiver and post-processed using Least Squares using Trimble Business Center software version 2.5; Residuals printed and included in the surveyor's report.
145 Secondary Points Located.
DELIVERABLESSurvey Field Notes
DELIVERABLESLeast Squares Adjustment Report and Final Coordinate Solution for Primary Control Benchmarks
DELIVERABLESGIS Survey Control Layer
DELIVERABLESGIS Layer
DELIVERABLESGIS Layer
DELIVERABLESRecord of Survey
KEYS TO SUCCESS
Constant Communication with Client
Adapt to Clients Needs
Team Work
Mission Planning and Point Management
Guidelines for New Technologies and Implementations
Good Food and Company
Victor M. RasgadoGeomatics Lecturer/GIS CoordinatorHawCC
Email: [email protected]: (808) 854-4820
Copyright ©2010 - 2014 Victor M. Rasgado
LET’S COLLABORATE