BRAND_NAME_SALIENT_CHARACTERISTICS_v2.docx

BRAND NAME SALIENT CHARACTERISTICS

The Department of the Interior (DOI) U.S. Geological Survey (USGS) Geology, Geophysics, and Geochemistry Science Center (GGGSC) is seeking increased capacity in airborne electromagnetic (AEM) data processing through an additional license to the Aarhus Workbench software package.

Sellers offering other than the Aarhus Workbench software package must offer software that meets or exceeds the following Brand Name Salient Characteristics:

Provide the capability: to dynamically edit AEM datasets in a GIS environment to perform laterally constrained inversions of AEM datasets, and to visualize inversion results in a single platform.

The offered license shall augment three previously purchased licenses of the Aarhus Workbench software. These licenses are heavily utilized, as AEM data processing and inversion is required to fulfill the scientific objectives of numerous active USGS projects, and AEM data are anticipated to be an integral part of new and continuing projects in future years.

The offered license shall increase the data processing capacity, improve efficiency, and lead to more timely results and publication.

The offered software package shall include processing, inversion and visualization of geophysical and geological data. The package shall integrate all steps in the workflow from handling the raw data to the final visualization and interpretation of the inversion models.

The offered software package shall include dedicated data processing modules for many geophysical data types, an integrated GIS platform and the robust and fast inversion code AarhusInv.

The offered software package shall meet or exceed the following key features/capabilities/salient characteristics:

• Supports data from many different airborne and ground based systems

• Fully developed processing tools and filters

• Import of DEM maps and incorporation of elevation data during inversion

• Integrated GIS interface

• Import of borehole data

• Visualization of data in themes and profiles

• QC visualization tool

• 1D LCI inversion with AarhusInv inversion code Airborne EM

• SkyTEM - Helicopter time-domain.

• General Helicopter Time domain EM. E.g. VTEM.

• Fixed Wing Time domain. E.g. TEMPEST.

• Helicopter frequency domain EM (HEM). E.g. RESOLVE, DigHEM Visualization and interpretation Visualization, evaluation and geological interpretation of the inversion results take place on the GIS-surface, in cross sections, and in a 3D visualization module. The offered software shall be fully compatible with the MapInfo (tab-files), ArcGIS formats (GeoTiff, Shape-files) and uses the Surfer grid file format. The offered software shall also support different database formats for geophysical data and boreholes.

GIS themes

• Generating geophysical theme maps, e.g. mean resistivity, isopac-map, elevation of geological interfaces, etc.

• Batch grinding of themes using Kriging or inverse distance interpolation, including semi-variogram analysis.

• Visualization of theme maps as colorized points or grid images.

• Borehole locations with easy access to detailed borehole reports.

• External GIS themes in MapInfo (tab-files) or ArcGIS formats (GeoTiff, Shape-files).

Cross sections

• Section location by drawing direct in the GIS-map or based on survey flight lines.

• Resistivity models displayed as bars or interpolated filled sections, combined with depth of investigation (DOI) information.

• Boreholes as bars with easy access to detailed borehole reports.

• Digitization of layer interfaces for easy geological interpretation.

• Sections combined with intersections in a grid displayed as lines.

• Extended label options for resistivity bars and boreholes. E.g. projection distances, lithology acronym, etc.