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SW UK QGIS Conference 19th November 2015
Using Lidar data in QGIS (and GRASS)
an archaeological adventure
www.pushingthesensors.com
Rebecca Bennett
SW UK QGIS Conference 19th November 2015
Historic landscapes and airborne remote sensing data
SW UK QGIS Conference 19th November 2015
Stonehenge, 1906 © Historic England NMR
Airborne Remote Sensing for Archaeology
‘The surface of England is a document that has been written on and erased over and over again; and it is the business of the archaeologist to decipher it’
OGS Crawford 1953
Bronze Age field system, Mountsland Common 2004 © Historic England NMR
SW UK QGIS Conference 19th November 2015
Airborne Remote Sensing for Archaeology
A matter of contrast
- small scale changes in soil matrix and topography
- evidence subtle, skilled interpreter
Two types of features detectable from the air:
Direct
Proxy
e.g. changes in topography
e.g. changes in soil orvegetation properties
- Problems extracting metric data, including location
Knook Fort, SPTA
SW UK QGIS Conference 19th November 2015
20022002 20042004
The traditional view: aerial imagery
SW UK QGIS Conference 19th November 2015
Airborne Laser Scanner (ALS): topographical features
Hyperspectral sensor:Proxy soil and vegetation change
Seeing More...
SW UK QGIS Conference 19th November 2015
Incorporating “New” technologies for Archaeological Survey
Komorebi – the light that shines between the leaves of the trees
SW UK QGIS Conference 19th November 2015
SW UK QGIS Conference 19th November 2015
Colouring the model by elevation alone it is pretty tricky to see the micro-topography so we need to process the terrain models further
Unfortunately there is no one perfect solution for archaeological prospection as we’ll see…
Coloured by elevation Shaded relief
SW UK QGIS Conference 19th November 2015
Nyork Moors © Historic England NMR
Replicating Raking Light
SW UK QGIS Conference 19th November 2015
The Effect of Combining Shaded Relief Models on Feature Location
SW UK QGIS Conference 19th November 2015
SW UK QGIS Conference 19th November 2015
Shaded Relief Local Relief
Openness Positive Openness Negative
SW UK QGIS Conference 19th November 2015
r.local.relief
SW UK QGIS Conference 19th November 2015
Exmoor NPA, Spring Fieldwork 2013
SW UK QGIS Conference 19th November 2015
GRASS > ParaView > Maya > DIVE
SW UK QGIS Conference 19th November 2015
Graduate Workshops in lidar 2010-2014
SW UK QGIS Conference 19th November 2015
Community Archaeology
SW UK QGIS Conference 19th November 2015
Making the Most of Lidar
SW UK QGIS Conference 19th November 2015
www.pushingthesensors.com
Thanks for listening!
