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Presentation Outline
- What is On-Demand Imagery?
- Things to consider
- Platform Options and Regulatory
Requirements
- Remote Sensing Techniques and Image
Products
- Application Review (QDVA)
On Demand High Resolution Aerial Imagery In The Upstream Oil & - - PowerPoint PPT Presentation
On Demand High Resolution Aerial Imagery In The Upstream Oil & - - PowerPoint PPT Presentation
Utilizing Remote Sensing and On Demand High Resolution Aerial Imagery In The Upstream Oil & Gas Environmental Sector Greg Lewis, B.Sc. Senior Environmental Scientist SUSTAINTECH 2017 SustainTech 2017 1 Presentation Outline What is
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What is On Demand Imagery?
- The ability to collect aerial imagery of exactly
where it is needed, when it is needed
- Situational awareness is key in environmental
response and documenting for monitoring
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What is On Demand Imagery?
- To be effective, on demand imagery needs to:
–Be easy and flexible to deploy –Potential for georeferencing –Have a clear workflow from acquisition to implementation
- A picture is worth a thousand words, a timely
aerial image and the value created is worth much more.
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Things to Consider
- Spatial extent and number of sites to be
captured
- Spatial resolution
- Frequency of imagery
- Type of imagery required (colour, NIR, both)
- Potential regulatory restrictions (Transport
Canada)
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Imagery Platforms
- There are a number of imagery acquisition
platforms available
- Recent growth in the use of Unmanned Aerial
Vehicles (UAV)
- End use deliverable and regulatory framework
must be considered
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UAV
Low altitude Small spatial coverage Limited flight time Very flexible deployment
Traditional Aircraft
Low to medium altitude Medium spatial coverage Hours of flight time Need runway & landing strip
Satellite
Orbit Very large spatial coverage Constant Orbit In ability to control
CLOUD COVER
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Unmanned Aerial Vehicles (UAV)
- Special Flight Operations
Certificate (SFOC)
– Recommended for commercial operations – Issued by Transport Canada (TC) – Site-specific or blanket certificates – Long lead times (months)
- Quickly deployed by qualified field staff
- Line of sight requirement
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Unmanned Aerial Vehicles (UAV)
- Altitude < 90m AGL
- Weather considerations
- Needs close access to site and
landowner permission
- Mission types
– Areas typically less than 2 hectares – Industrial sites – Spill sites – Lease sites
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Fixed-Wing Aircraft
- Capable of Rapid Response
– Certified & portable camera pod – No aircraft modifications required – High availability of aircraft & pilots – Charter license required by aircraft
- perator
- Altitude adjustable, usually 2000’
AGL or higher, cloud cover / haze
- Camera pod payload up to 60 pounds
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Fixed-Wing Aircraft
- Long Flight Times
– 4 to 4.5 hours max, 3 hours typical
- Land
– No prior permission, no permitting, no site-specific safety training – Large / long areas
- Cost Effective
– Potential for low cost per area unit
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NIR Imagery and NDVI
- Healthy vegetation cellular structure highly
reflects near infrared wavelengths as compared to red wavelengths
- Normalized Difference Vegetation Index
(NDVI) describes this gap and quantifies the amount of biomass
𝑶𝑬𝑾𝑱 = 𝑶𝑱𝑺 − 𝑺𝒇𝒆 𝑶𝑱𝑺 + 𝑺𝒇𝒆
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Application - Situation
- Client had recently completed an acquisition
- f 250+ sites
- Needed a cost effective method of
documenting site conditions to effectively develop an environmental program
- Focus of assessment on vegetative state of
sites
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QDVA
- Quantitative Desktop Vegetation Assessment
- Automated evaluation of vegetation variation
within areas of interest as compared to background values based on NDVI values
- Relative ranking system developed to rank
multiple sites
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QDVA Process
Colour Near Infrared NDVI Area of Interest Background
𝑹𝑬𝑾𝑩 𝑺𝒃𝒖𝒋𝒑 = %𝐼𝑗ℎ + %𝑁𝑓𝑒𝑗𝑣𝑛 %𝑁𝑓𝑒𝑗𝑣𝑛 𝑀𝑝𝑥 + %𝑀𝑝𝑥 𝑹𝑬𝑾𝑩 𝑺𝒃𝒐𝒍𝒋𝒐𝒉 = 𝑅𝐸𝑊𝐵 𝑆𝑏𝑢𝑗𝑝 𝐵𝑠𝑓𝑏 𝑝𝑔 𝐽𝑜𝑢𝑓𝑠𝑓𝑡𝑢 𝑅𝐸𝑊𝐵 𝑆𝑏𝑢𝑗𝑝 𝐶𝑏𝑑𝑙𝑠𝑝𝑣𝑜𝑒
Deliverables
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Benefits
- Efficient comparison for large number of sites
- Can provide insight into unknown sites and
direction for potential program development
- Documentation of site conditions
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Limitations
- Automated process only as good as the data
coming into the process
- Difficult to create a process that works for
every site situation
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Further Development
- Review and refinement of QDVA ratio and
ranking system using ground based field data
- Develop a more robust model that potentially
can adjust to unique site conditions in a systematic way
- Assess UAV based system
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Wrap Up
- On demand imagery has become very popular
with the explosion of UAV’s
- Many things need to be considered for
effective application
- Remote sensing techniques and models need