integration of digital photos into mobiile gis (epan 2010)

Adding Digital Photographs to Your GIS

Jim OweckeEarth Vector Systemswww.evsgps.com434-817-5000

Why add digital photos to GIS?

Rich in detailExpert reviewEvidenceHistorical RecordsMinimal extra cost

Methods of adding photos

1. Time matching2. Embedding GPS into the photo3. Mobile GIS Linking

Methods of adding photos

1. Time matching

Time Matching – Cons

May get mis-matched positionOne-to-one

One photo per feature

Time Matching – Pros

Simple to implement in field proceduresCan use inexpensive recreation-grade GPS if submeter accuracy not required

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Methods of adding photos

2. Embedding GPS into the photo

Embedding GPS – Methods

1. Send GPS to camera via Bluetooth

Embedding GPS – Methods

2. Use GPS-integrated camera

Embedding GPS - Cons

No post-processing of GPS possibleMust have real-time correction for accurate positionPosition will have 5-15 meters of error if uncorrected.

One-to-oneOne photo per feature

Embedding GPS - Pros

Matching error eliminatedIf real-time corrected - office procedure of differential corrections is not needed

Methods of adding photos

3. Mobile GIS Linking - TrimPix

Mobile GIS Linking - Cons

Slightly more complex setup

Mobile GIS Linking - Pros

Matching error eliminatedGPS data can be differentially corrected back in the office to improve accuracy to submeter or betterMany-to-one

Many photos can be taken for a single feature

Mobile GIS Linking - Demo

Trimble TerraSyncESRI ArcPad

Ricoh 500SE Digital Camera

Can perform all three types of digital photo capture for GIS

Thank You

Jim OweckeEarth Vector Systemswww.evsgps.com