MAPPS 2013 Winter Conference 2013 Cornerstone Mapping, Inc. 1

Transcription

1 MAPPS 2013 Winter Conference 2013 Cornerstone Mapping, Inc. 1

2 What is Thermal Imaging? Infrared radiation is perceived as heat Heat is a qualitative measure of temperature Heat is the transfer of energy Energy can be quantitatively measured with a special camera MAPPS 2013 Winter Conference 2013 Cornerstone Mapping, Inc. 2

3 What is Thermal Imaging? Detection of thermal infrared energy It is a way to look at the heat signature of an object MAPPS 2013 Winter Conference 2013 Cornerstone Mapping, Inc. 3

4 What is Thermal Imaging? Electromagnetic Spectrum Atmospheric Thermal Windows Reflectance nm ,000 5,000 8,000 14,000 nm Blue Green Red Near Infrared Mid-Wave Thermal (MWIR 3-5μm) Long-Wave Thermal (LWIR 8-14μm) MAPPS 2013 Winter Conference 2013 Cornerstone Mapping, Inc. 4

5 Temperature Cross-Over Diurnal Effects Temperature for different objects will be the same twice a day. Air Temperature Ground Water Temperature Thermal Crossover morning evening Time of Day MAPPS 2013 Winter Conference 2013 Cornerstone Mapping, Inc. 5

6 Why isn t Thermal Imagery Widely Available? Thermal cameras are very expensive digital GPS/IMU Difficult to integrate analog technology for mapping data storage analog Integrate resolution flight nav Time consuming to georeference very low resolution images software thermal mosaic MAPPS 2013 Winter Conference 2013 Cornerstone Mapping, Inc. 6

7 Older Technology Based on analog video technology GPS position overlaid on video frame Low resolution arrays 320 x 240 pixels Low signal-noise ratios Limited camera features MAPPS 2013 Winter Conference 2013 Cornerstone Mapping, Inc. 7

8 Latest Technology Digital Acquisition Radiometrically Calibrated Post-Process Data Correct for... Ambient Temperature Relative Humidity Emissivity External Interfaces Data I/O... GPS Event Trigger Live Camera Feed Precision: < 0.1 C MAPPS 2013 Winter Conference 2013 Cornerstone Mapping, Inc. 8

9 Thermal Camera Resolution Long Wave IR Coming Soon 256% larger Reasonable Yes 320 x 240 pixels 640 x 480 pixels 1024 x 768 pixels Not Practical MAPPS 2013 Winter Conference 2013 Cornerstone Mapping, Inc. 9

10 Thermal Camera Resolution Long Wave IR HD 2012 flight test Standard co-mounted cameras different focal length to achieve same GSD MAPPS 2013 Winter Conference 2013 Cornerstone Mapping, Inc. 10

11 Challenge Build an Airborne Thermal Mapper My Approach Utilize existing hardware & software POS/Track POS/AV Azimuth Mount POSPac and Inpho Suite In-house system integration Leverage design experience Thermal Camera Identify image processing workflow and overcome hurdles How to go from raw image to ortho product MAPPS 2013 Winter Conference 2013 Cornerstone Mapping, Inc. 11

12 Challenge Build an Airborne Thermal Mapper Questions Is it practical to fly thermal imagery? Low resolution Small footprint Lots of flight lines Small acquisition windows Is it practical to process thermal imagery? A lot of small footprint images Can direct georeferencing help? Will existing photogrammetric workflow work? MAPPS 2013 Winter Conference 2013 Cornerstone Mapping, Inc. 12

13 Challenge Build an Airborne Thermal Mapper Answers Yes for small projects Is it practical to fly thermal imagery? Yes Is it practical to process thermal imagery? Yes virtually required Can direct georeferencing help? Yes Will existing photogrammetric workflow work? MAPPS 2013 Winter Conference 2013 Cornerstone Mapping, Inc. 13

14 Thermal Mapping Project 42 sqmi 0.5-m GSD 3,200-feet AGL ~5,400 images Image every 0.8-seconds ~15 images MAPPS 2013 Winter Conference 2013 Cornerstone Mapping, Inc. 14

15 City-Wide Energy Assessment Green Energy Projects Clip thermal data based on building footprints Calculate average rooftop temperature Analyze data for target programs MAPPS 2013 Winter Conference 2013 Cornerstone Mapping, Inc. 15

16 Thermal Imagery in GIS Image Overlay Data Fusion Pan Sharpening MAPPS 2013 Winter Conference 2013 Cornerstone Mapping, Inc. 16

17 Airborne Thermal Imaging Night-Time Thermal Image Direct Georeferencing Thermally Sensitive Spatially Accurate MAPPS 2013 Winter Conference 2013 Cornerstone Mapping, Inc. 17

18 Thermal Imaging Applications Deer Population Heat Signature Profile Mapping Wildlife MAPPS 2013 Winter Conference 2013 Cornerstone Mapping, Inc. 18

19 Thermal Imaging Applications Environmental Mapping Vegetation Mapping MAPPS 2013 Winter Conference 2013 Cornerstone Mapping, Inc. 19

20 Summary Airborne Thermal Imaging Cutting-Edge Technology Numerous Applications Cornerstone Mapping Aaron Schepers 8118 S 23 rd CT Lincoln, NE (402) aschepers@cornerstonemapping.com MAPPS 2013 Winter Conference 2013 Cornerstone Mapping, Inc. 20