Satellite Remote Sensing in Archaeology: Imagery Analysis
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Transcript of Satellite Remote Sensing in Archaeology: Imagery Analysis
Remote Sensing in Archaeology
Imagery Analysis
Remote Sensing
Remote Sensing
Perception at a distance
Interpretation of imagery
Spatial analysis
ArchaeologyArchaeologySite detection
Regional spatial analysis
Predictive modeling
Historic preservation in regional planning
Early Remotely Sensed Data
Early Remotely Sensed Data
French balloonist
Reconnaissance photography
USDA and USGS aerial data
Landsat program
Multispectral ImageryMultispectral Imagery
Several to hundreds of data layers
Stacked data file
Choose three to show
Layer 3 (8,9)
Layer 1 (8 ,9)
Layer 2 (8,9)
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Multispectral ScanningMultispectral Scanning
Selected wavelengths
Airborne and satellite
Measurement of differences
Electromagnetic radiation
Electromagnetic RadiationElectromagnetic Radiation
Light, heat, and microwaves
Differential reflection/emmisivity
Shorter WavelengthsShorter WavelengthsReflectance
Solar radiationVisible, NIR,
and MIR
Longer Wave Lengths
Longer Wave Lengths
Thermal bands
Emissivity
Radar
Geometric and dielectric properties
Key Targets for Wavelength
Key Targets for Wavelength
Soil, plants, buildings, roads, water Blue
Traces of buildings and roads, plant type boundariesGreen
Buildings, roads, chlorophyll absorption bandsRed
Soil moisture, bodies of waterNear infrared
Types of rock, Soil moisture Middle infrared
Heat, soil moisture, plant stress Thermal infrared
Objects buried in arid soils, cultural features Microwave
Visual Site DetectionVisual Site Detection
Topological features
Soil features
Vegetation features
Image AnalysisImage Analysis
Intuitive Statistical
Intuitive AnalysisIntuitive Analysis
A priori, deductive reasoning
Lacks statistical measure of validity
Quick and effective
Intuitive Statistical
Statistical AnalysisStatistical Analysis
Measurable accuracy
Higher loading on office time
Can become complex
GIS Integration
GIS Integration
Create vector layers from results
Overlay vector shapes
Drape imagery onto DEMs
Site Type ExamplesSite Type ExamplesBuilding Remains
Roads
Habitations
Ceremonial Features
Building RemainsBuilding Remains
Possible feature detected Feature verified
RoadsRoads
HabitationsHabitations
Ceremonial Features
Ceremonial Features
Suggestions for IowaSuggestions for Iowa
Study known sites
Develop regional models
Incorporate models in planning/preservation process
Thanks for coming
End transmissionEnd transmission