Copyright © 2005 Trimble Navigation Ltd. All rights reserved GPS Processing within the Geodatabase.

Copyright © 2005 Trimble Navigation Ltd. All rights reserved

GPS Processing within the Geodatabase


Session Overview

• Support for GPS Data within ArcGIS

• Overview of GPS Analyst Extension

• GPS Analyst Data Model

• Office software demonstration

• Further Resources


What Do I Need to Post-Process?

GPS Analyst

+ GPScorrect

TerraSync

NMEA


Support for GPS Data in ArcGIS• GPS support within ArcGIS via a NMEA-

enabled GPS Toolbar (free download from ESRI)


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


• An ArcGIS Desktop extension that allows you to work directly with GPS data

What is the GPS Analyst extension?


• 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?


• 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?


Key features

• View, edit, and analyze GPS data directly inside ArcMap


• 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


• 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


Why postprocess your data?


• Have confidence in the quality of your data– Store detailed information on every

GPS position

Key features


• Ensure features meet your required accuracy – Run validation on GPS positions– Rebuild features that do not meet the

accuracy requirement

Key features


• 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


• 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


• Comprehensive GPS status display screens– GPS satellite information– Real-time status– Receiver status

Key features


Using GPS Analyst to Improve GPS Data Quality

• ArcGIS Desktop extension that allows you to work directly with GPS data


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


GPS Analyst Data Model…Get from Here…


GPS Analyst Data Model…Get from Here…

To Here...?


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


GPS Analyst Toolbar

Field Tools

GPScorrect Tools

Office ToolsPull-Down Menu

Query/Analysis


GPS Analyst Toolbar

Field Tools

GPScorrect Tools

Office Tools

Ability to turn toolbar sections on or off


GPS Analyst Demo


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


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


Questions?

Copyright © 2005 Trimble Navigation Ltd. All rights reserved GPS Processing within the Geodatabase.

Documents

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