integration of digital photos into mobiile gis (epan 2010)
TRANSCRIPT
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
