open source gis magnetic anomalies germany aerial photography archaeology vertical berlin mesh europe large scale methodology photograph belarus photo reading roman germanic commission aerial survey etruscan resistivity model methods hellkite relief visualization about scale. archaeology oblique geopyhsics underwater remote sensing data processing 3d restitution magnetic visualisation visualization magnetometer high resolution landscape gps princely sites glauberg lidar survey structure from motion resilience historic landscape geophysical survey poland conference aerial stereoscopic integrated research culture 2007 mine remote sensing dtm digital terrain model aerial photograph 3d built heritage poznan northern ireland point cloud university of ulster laser beam teaching 3d landscape partner german archaeological institute geophysical historic environment tara cultural heritage management livt roman fli map 400 discovery programme landscape archaeology 3 dimensional model relief mapping inertial measurement unit ireland radar dsm toolbox change guideline skellig michael event vegetation removal airborne laser scanning hillforts three dimnesional limes mapping centre for maritime archaeology danube dam gpr interpretation special interest group balloon precision reconnaissance soil software tools workshop digital elevation model italy flimap research caa archaeophysica documentation of archaeological structures void aerial archives transformation resistance systems integration multi method software eu geophysics building control points electrical resistance world heritage site devenish digital surface model esof ransformation infrared light aerial images error ground resolution archaology laser intensity cropmarks electrical resistivity tomography associated partner global positioning system photogrammetry magnetometry dem aargnews multi sensor micro topography low altitude aerial photos development digital aerial photography topographic survey lidar data capture spain iron age