copyright © 2005 trimble navigation ltd. all rights reserved gps processing within the geodatabase
TRANSCRIPT
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Copyright © 2005 Trimble Navigation Ltd. All rights reserved
GPS Processing within the Geodatabase
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Session Overview
• Support for GPS Data within ArcGIS
• Overview of GPS Analyst Extension
• GPS Analyst Data Model
• Office software demonstration
• Further Resources
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What Do I Need to Post-Process?
GPS Analyst
+ GPScorrect
TerraSync
NMEA
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Support for GPS Data in ArcGIS• GPS support within ArcGIS via a NMEA-
enabled GPS Toolbar (free download from ESRI)
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Support for GPS Data in ArcGIS• GPS support within ArcGIS via a NMEA-
enabled GPS Toolbar (free download from ESRI)
• Limitations– No indication/documentation of GPS Quality– No ability to eliminate significant error
sources through DGPS– No ability to “drill-down” to review/edit
source GPS data
• GPS Analyst resolves most of these issues
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• An ArcGIS Desktop extension that allows you to work directly with GPS data
What is the GPS Analyst extension?
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• Maximize the accuracy of your GPS data– Differentially correct in ArcGIS with
Trimble’s proven correction engines– Store GPS metadata in the geodatabase
Why use the GPS Analyst extension?
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• Improve field-to-office workflow– Collect features and GPS data directly into the
geodatabase with Trimble or NMEA receivers– Check GPS data directly into the geodatabase– View, query and analyze GPS data alongside GIS
layers– Create custom workflows that include GPS data
processing
Why use the GPS Analyst extension?
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Key features
• View, edit, and analyze GPS data directly inside ArcMap
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• Improve productivity by eliminating extra file conversions – Direct check-out and check-in of data
from ArcPad + Trimble® GPScorrect™ extension for ESRI ArcPad
– Import and export files from TerraSync™ in ArcCatalog
Key features
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• Improve GPS position accuracy by postprocessing data– Using Trimble’s proven differential
correction engines– With automatic base file search and
download from the Internet
Key features
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Why postprocess your data?
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• Have confidence in the quality of your data– Store detailed information on every
GPS position
Key features
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• Ensure features meet your required accuracy – Run validation on GPS positions– Rebuild features that do not meet the
accuracy requirement
Key features
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• Take the power of ArcGIS to the field– Access full
geodatabase capabilities in the field
– Log GPS data, features, andattributes directly to the geodatabase
– Use familiar ArcMap tools in the field
Key features
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• Using GPS to find existing features– For inspection or maintenance– For attribute and position
verification or update– Easy to use direction dial
and lightbar
Key features
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• Comprehensive GPS status display screens– GPS satellite information– Real-time status– Receiver status
Key features
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Using GPS Analyst to Improve GPS Data Quality
• ArcGIS Desktop extension that allows you to work directly with GPS data
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GPS Analyst Work Flows
• Data check-out and check-in for ArcPad + GPScorrect
• Import and Export for Trimble SSF files via ArcCatalog
• Store detailed quality information for GPS data
• Take advantage of ArcMap tools and functions
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GPS Analyst Data Model…Get from Here…
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GPS Analyst Data Model…Get from Here…
To Here...?
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Data Model• All underlying GPS positions retained• Enables re-building of GIS features
using different settings• Enables selection of positions from
different sessions• Accuracy of each feature persisted to
GeoDatabase– Average Estimated Accuracy– Worst Estimated Accuracy
• GIS feature coordinates are abstraction from underlying GPS position data
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GPS Analyst Toolbar
Field Tools
GPScorrect Tools
Office ToolsPull-Down Menu
Query/Analysis
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GPS Analyst Toolbar
Field Tools
GPScorrect Tools
Office Tools
Ability to turn toolbar sections on or off
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GPS Analyst Demo
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Summary• If accuracy is important, you must
accommodate post-processing for GPS data
• GPS Analyst permits analysis and post-processing of GPS data
• Permits verification and documentation of GPS quality
• Supports GPS data collection by ArcPad, ArcGIS, Trimble and 3rd-party applications
• Open - Ability to create custom applications or workflows
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Further Resources
FAQ’s
White Papers
Support Resources Etc.• Getting Started Guide
– Comprehensive Introduction to GPS– GPS Analyst concepts and tutorials
• For more information:
http://www.seilerinst.com/mapping
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Questions?