The viewshed of a topographic dataset is the region around a given observation point that is visible from that location. Most GIS packages allow its computation. It has many uses, such as in urban environment planning, or in analysing archaeological site data. The viewshed is used here as a data enhancement tool to aid in the interpretation of geophysical potential field data. The fraction of t...

Similarity measures are becoming increasingly commonly used in comparison of multiple datasets from various sources. Semblance filtering compares two datasets on the basis of their phase, as a function of frequency. Semblance analysis based on the Fourier transform suffers from problems associated with that transform, in particular its assumption that the frequency content of the data must not ...

In general, the conventional approach to structure study uses potential-field data, including aeromagnetic and gravity data, for detecting the basement structures, and geophysical well-log data (combined with seismic data when available) for interpreting the sedimentary cover structures. With respect to well-log data, the main approach is to interpret faults from isopach and structure-top conto...

We present our aeromagnetic survey results from an investigation of the iron ore mineral distribution in Pocheon, Korea, west-central area Korean Peninsula. A manned system using a helicopter for regional exploration and unmanned multicopter high-resolution were used survey. The inversion magnetic data confirmed possibility existence new body. Drilling was carried out based on drilling revealed...

ABSTRACT The moment magnitude (Mw) ?7 earthquake that struck Charleston, South Carolina, on 31 August 1886 is the largest historical in United States east of Appalachian Mountains. fault(s) ruptured during this has never been conclusively identified, and conflicting fault models have proposed. Here we interpret reprocessed seismic reflection profiles, legacy aeromagnetic data, newly collected g...