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ArchaeoFusion Features

 

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ArchaeoFusion is an all in one product that loads data from many sources, processes the data, and then integrates it into a clear representation of subsurface features.

Main Window

The main window is dominated by the display of the project's data. The panel on the left is an organization of the projects contents. The panel on the right has metadata.

 

Surveys

Multiple surveys can be loaded into one project. The survey panel allows the selection of the active survey. Surveys can be turned on or off. The visual interpretation of the data can be adjusted by the slider which adjusts the brightness based on some number of standard deviations. Individual bands of data can be turned on or off and assigned to different color bands (red, green, or blue).

 

 

 

 

 

Survey Metadata

The selected survey tile metadata appears in the text box when the tile is clicked on in the main panel. Below the metadata box are two histograms with mean and standard deviation information. The top one is for the whole survey data set while the bottom is for the open operations filtered region. The arrow buttons above the histograms are used to flip though each band in the survey.

 

 

 

 

 

 

 

 

 

 

Viewer pose and options

On this portion of the main screen the user can see the state of main view panel. Here the user can see the latitude and longitude of the center point of the panel. The black arrow shows the direction of true north while the white arror show the direction of survey north. The pull down menu shows the currently applied color map and controls the changing of the color map. There are four buttons that affect the display. When Difference is selected the display shows the difference in the data due to whichever operation is open. When all operations are closed it shows the difference due to all operations. When Smooth is selected a filter is applied in the video card to depixelate the data. Show Filter causes the currently open operation's filter to be shown. Show Tiles creates a border around each tile so as to illuminate where each tile is.

 

Surfaces 

All surveys are projected on surfaces. The surface can be a plain slice of the WGS 84 ellipsoid, a height map of the survey data itself, a captured micro topography of the site, or a large scale DEM surrounding the site. Surfaces can be turned on or off with the check box. A surface can be created in three ways. A surface can be created based on the WGS84 ellipsoid model of the earth. A surface can be created from the data from a survey; essentially treating the survey data as a height map. And a surface can be created by reading in a GeoTIFF file and treating it as a height map.

 

Operations  

When a survey is selected, the list of operations that is applied to the survey is displayed in the box under the survey list box. Operations are perfomed on the data to clean it up and enhance the final image. When an operation is selected it's options panel is opened. Operations have some common components. First there is a filter that determines to what area the operation is applied. The operation can be applied to all the data in the survey, or to select group of tiles, or to a selected area defined by a bounding box. In the case of tiles and bounding box filters, when the operation is opened the filtered area appears on the data display. The pull down menu next to the filter radio buttons lets you set the filter by copying it from another operation. Underneath the filter radio buttons is a set of toggle buttons that lets you select which bands the operation is applied to.

 

Operation list

  • Destagger - adjusts the position of tile traverses to account for positioning error
  • Resample - adjust data values
  • Clip - clips the bound of the data
  • Despike - removes or lessens spikes in the data
  • Detrend - removes sensor drift from the data
  • Zero mean traverse
  • Mean Profile filter
  • Tile match - edge matches two tiles
  • Tile warp
  • Tile Balance - removes data offset errors between tiles
  • 2D Fourier - two dimensional fourier filter
  • 1D Fourier - one dimensional fouire filter
  • Band calculator - allows for a user created data operation
  • Liner filter
  • Non linear filter
  • Smooth - smoothes the data
  • Robust
  • Fill - fill holes (NaNs) in data
  • Reclassify - adjust data values
  • Edge - finds edges
  • Standardize - remaps data values to so that one standard deviation equals one
  • Principle Components Analysis
  • K-Means Analysis

 

Data Cube Viewer

The data cube viewer is opened from the main window. It presents the user with a unique way to look at data collected from ground penetrating radar that may reveal more than what the slices of data can show. The user of the data cube viewer can quickly and easily slice through the data from top to bottom, north to south, and east to west.

 

Data Import

The data can come from a variety of sources. The panel shown to the right is the first panel in the data loading process. It is used to collect some basic metadata from the user that is not present in the source file.

Data Sources

Magnetrometry

  • Bartington Grad601-2
  • Bartington Grad601
  • Geoscan FM18
  • Geoscan FM36
  • Geoscan FM256
  • Geometrics G-858

 

EM

  • Geonics EM38MK2
  • Geonics EM38B
  • Geonics EM38DD
  • GSSI EM Profiler

 

Resistivity

  • Geoscan RM15
  • Geoscan RM4
  • TRCIA

 

Conductivity

  • Geonics EM28
  • Geonics EM38B
  • Geonics EM38DD

 

Magnetic Susceptibility

  • Geonics EM38
  • Geonics EM38B
  • Geonice EM38DD

 

GPR

  • GSSI SIR-3000
  • GSSI SIR-10
  • GSSI SIR-20
  • GSSI SIR-2000
  • S&S Noggin
  • S&S PulseEKKO Pro

 

In addition to the native formats of the various sensors ArchaeoFusion can also load some standard formats:

  • Surfer Binary Grid
  • Surfer ASCII Grid
  • TIFF image
  • XYZ ASCII
  • Z Only ASCII
  • CSV ASCII

 

Tile Clean Up

Some data files are not redily converted into a matrix of data without some initial processing. These data files have rows of data that are either over sampled or under sampled and the rows need to be adjusted to format the data into tiles.

  

 

Loading Ground Penetrating Radar (GPR) Data

Loading GPR data requires special processing that the other formats do not. GPR data is created in slices each one representing a single traverse across the survey tile. These profiles need to be assembled into a data cube representing a volume of data in that survey tile. Before that can happen though the slices have to be processed through five steps: fix fiduciary mark problems, adjust ground level, remove the trace average, smooth out the power distribution, and determine the depth. Once all that is done, the data cube can be saved.

 

Tile Assembly 

The Survey Tool creates the survey; the user names the survey and sets the survey reference coordinate. The loaded tiles are dragged into the survey and placed at their proper location with respect to the survey reference coordinate. At this stage you can still alter single tiles if it's clear due to the assembly of the tiles that a tile needs to be rotated, flipped, or resized. In the case of GPR data there is an extra step that involves creating slices of the GPR data by gathering data between two depths into a single band.

   

 

Exporting Data 

The processed surveys can be exported for use in other programs, presentations, or publications. The available export formats are GeoTiff, PNG, and ASCII GRID. The exported images can sized by setting the size of the image in pixels or by setting the size of the pixels in meters.