Cloud Frontiers: A Deep Dive into Serverless Spatial Data and FME
Hawaii Pacific GIS Conference 2012: Survey and Positioning - GNSS (GPS) Workflows with Integrations to GIS
1. MODULE
1
GNSS (GPS) Workflow and
Integration into GIS
Karyn Nolan
2. Top 3 Questions
What is the accuracy of the equipment?
How do I have a picture as an attribute?
Why is my data in the ocean?
….other tips along the way
3. Differential Corrections
Real Time Accuracy
Autonomous
– 10 m with uncorrected GPS
Satellite Based Augmentation System (SBAS) – 1-5 m
– WAAS - US
– EGNOS - Europe
– MSAS – Japan
– GAGAN - India
5. Future Trend
Real Time Accuracy
VRS subscription or Single Base broadcast
– cell phone or radio
– http://www.trimble.com/infrastructure/services.aspx
100cm
VBS/WAAS/EGNOS
15cm
XP/G2
10cm
HP
4cm
CenterPoint
RTX
2cm
RTK/VRS
0cm
6. Trimble VRS Now Network
Europe: Czech Republic, Estonia,
Great Britain, Germany,
Netherlands, Belgium, Luxembourg
& Ireland
Estonia
Ireland
Great-
Netherlands
Britain
Germany
Belgium Czech
U.S.: Alabama, Colorado, Florida, Illinois, Lux
Iowa, Indiana, Kentucky, Mississippi and
Nebraska
Madrid
7. Differential Corrections – Post Process
Post Processed Accuracy (PPA)
Corrections applied in office software
– CORS
– Achieve Specifications of Equipment!!
8. Global Navigation Satellite System
What is the Global Navigation Satellite System, GNSS?
GPS – US Global Positioning System
GLONASS – Russian GLObal NAvigation Satellite System
Galileo – European Union (currently non-functional)