Calculate Seed Statistics

Use the Calculate Seed Statistics option (Geosoft.uxo.gxnet.dll(Geosoft.GX.UXO.UxaCalculateSeedStatistics;Run)*) to generate statistics by comparing seed A seed item is an Industry Standard Object (ISO) or inert munition buried at a recorded location and depth; it is used as a process quality check for munitions response tasks, including detection surveys, static/cued surveys, and anomaly recovery operations. and source databases based on a set of source metrics and defined thresholds. You can plot a detailed report of the statistics, display the summary statistics on a map, or save the seed statistics to a report (CSV) file. The tool can be used both individually with physical seeds or in conjunction with synthetic seeding.

Expand to see where this option is available.

UX-Analyze extension:

• AGC Dynamic Data
• AGC Static Data
• AGC Expert User

The following are accomplished when this tool is executed:

• Quality control (QC) statistics are generated – comparing seed (known) and source (unknown) databases based on correct location and classification of seed items.
• The seed database is updated with new (mask) channels for the seed statistics and source metrics that:
  • indicate which seeds passed the QC.
  • indicate which seeds failed the QC based on a defined set of thresholds:

    Maximum horizontal (radial) distance(m)

    Maximum vertical/depth(BGS) distance(m)

    Minimum model fit coherence

    Maximum inverted and sensor distance(m)

    Maximum signal amplitude difference(%)

    Maximum size difference(%)

    Maximum decay difference(%)

• The source database is updated with new channels for seed statistics.
• A summary text file (CSV), map, and report (plot) can be produced.

Calculate Seed Statistics dialog options

Application Notes

A seed item is an Industry Standard Object (ISO), or inert munition buried at a recorded location and depth; it is used as a process quality check for munitions response tasks, including detection surveys, static/cued surveys, and anomaly recovery operations.

The types of physical seeds are:

• Quality control (QC): the identity, location, and depth of the seed item are blind (not known) to all members of the survey team. Ideally, QC seeds are distributed such that the field teams can be expected to encounter between one and three seeds per day per team.
• Validation: the identity, location, and depth of the seed item are blind to the contractor. Emplaced by, or on behalf of, the government, they are used to evaluate overall contractor performance on advanced geophysical classification projects.

How it Works

When the GX is run, the following steps are executed:

1. The seed items are matched to the source items by: 

   • finding all the sources that are within one metre of a seed location.
   • selecting the closest TOI source to the seed location (i.e., a category 1 or 2). If none are TOI, the closest source is selected.
   • checking that the source is with horizontal distance then depth.

2. For each seed item found to match to a source, the following channels are gathered from the source group: determined from the source group:

   • UXA_FIT_X
   • UXA_FIT_Y
   • UXA_Fit_BGS
   • UXA_TARGET_ID
   • UXA_FIT_COH
   • UXA_diff_array_fit
   • UXA_SIG_AMPLITUDE
   • UXA_SIZE (low gate), user selected
   • UXA_DECAY (decay gate), user selected
   • UXA_Decision_Statistic
   • UXA_Category
   • UXA_UXOType

3. The QC metrics and statistics are calculated:

   • Horizontal (radial) offset distance (m)
   • Vertical/depth offset (m)
   • Fit coherence
   • Signal amplitude difference (%)
   • Size difference (%)
   • Decay difference (%)

Outputs

This tool creates several outputs:

• Metrics within the Seed database
• Metrics within a CSV file
• Summary Plot
• Summary Map (optional)

Databases

The GX creates the following channels in the seed and source databases:

Seed Database

• Channels added to seed-source metrics:

  • UXA_SeedQc_Pass: indicates the seed was detected and passed the QC metrics. In this mask channel, '1' indicates a pass.

  • UXA_SeedQcFail_Dig: indicates if the matched source is not on the dig list. In this mask channel, '1' indicates a QC failure, and it can be used to subset the list for further investigations.

  • UXA_SeedQcFail_Fit_Coh: indicates if the matched source has less than the minimum model fit coherence. In this mask channel, '1' indicates a QC failure, and it can be used to subset the list for further investigations.

  • UXA_SeedQcFail_Diff_Array_Fit: indicates if the matched source exceeds the maximum distance between the inverted (fit) and sensor array locations. In this mask channel, '1' indicates a QC failure, and it can be used to subset the list for further investigations.

  • UXA_SeedQcFail_SIG_AMPLITUDE: indicates if the match source exceeds the maximum signal amplitude difference. In this mask channel, '1' indicates a QC failure, and it can be used to subset the list for further investigations.

  • UXA_SeedQcFail_Size: indicates if the match source exceeds the maximum size difference. In this mask channel, '1' indicates a QC failure, and it can be used to subset the list for further investigations.

  • UXA_SeedQcFail_Decay: indicates if the match source exceeds the maximum decay difference. In this mask channel, '1' indicates a QC failure, and it can be used to subset the list for further investigations.

• Channels added for other source metrics:

  • UXA_Src_TARGET_ID: the unique id of the source

  • UXA_Src_Dist_Horz: the horizontal (radial) offset distance between the seed and the source

  • UXA_Src_Dist_Vert: the vertical offset calculated from the seed to source

  • UXA_Src_Offset_Azimuth: the declination or azimuth between the seed to source

  • UXA_Src_Offset_Inclin: the inclination from the seed to source

  • UXA_Src_Fit_Coh: the fit coherence of the source

  • UXA_Src_Diff_Array_Fit: the distance between the inverted (Fit) location of the source and the center of the sensor array

  • UXA_Src_SIG_AMPLITUDE: the source signal amplitude, the maximum monostatic signal

  • UXA_Src_Size (low gate): size at the low/first gate

  • UXA_Src_Decay (decay gate): decay at the decay gate

  • UXA_Src_Decision_Statistic: the classification decision statistic for the source

  • UXA_Src_Category: the classification category of the source

  • UXA_Src_UXOType: the source classification UXO type

  • UXA_Src_Multi_Matched: a list of other source IDs that also fall within the search volume

Source Database

• Channels added to identify the sources that are matched to seeds:

  • UXA_Seed_Id: the unique id of the seed

  • UXA_Seed_Type: the type of seed

Summary CSV File

A comma delimited file with the same columns added to the seed database, listed above.

Summary Map

The Data view of the map will contain four separate groups:

• Seeds: marked with symbols that are rotated to match the calculated seed-source azimuth and labeled with the Seed Id (above centered):
  • Seeds_Detected (Pass): green circle symbol rotated to match the calculated seed-source azimuth and labeled with the Seed Id
  • Seeds_NotDetected (Fail): red circle symbol rotated to match the calculated seed-source azimuth, and labeled with the Seed Id

• Sources: marked with symbols and labeled with the Seed Id (below centered):
  • Sources_Seeded: blue circle symbol (75% of the seed symbol size) and labeled with the Seed Id
  • Sources_NonSeeded: grey circle symbol (50% of the seed symbol size) and labeled with the Seed Id

The Base view Legend group will contain the following items:

• Number and percentage of seeds (detected)
• Number and percentage of seeds (not detected)
• Number of sources (seeded)
• Number of sources (non-seeded)
• Total number of seeds
• Number and percentage of seeds (passing)
• Number and percentage of seeds (passing) on the dig list
• Statistics Table: Minimum / Maximum / Mean / Standard Deviation for:
• Horizontal (radial) offset distance (m)
• Vertical/depth offset (m)
• Fit coherence
• Signal amplitude difference (%)
• Size difference (%)
• Decay difference (%)
• Seed database
  • Name:
  • Group:
  • Type: e.g., Quality Control, Synthetic

• Source database
  • Name:
  • Group:
  • Created: YYYY-MM-DD, hh:mm:ss

Summary Report Plot

The plot will report on the following summary items:

1. Title: "Seed Statistics Summary"
2. File details and date:
   • Seed database
   • Name
   • Group
   • Type (e.g., Quality Control)
   • Source database
   • Name
   • Group
   • Created: YYYY-MM-DD, hh:mm:ss
3. Summary
• Total number of seeds
• Number and percentage of seeds (detected)
• Number and percentage of seeds (not detected)
• Number and percentage of seeds (passing)
• Number and percentage of seeds (passing) on the dig list
4. Table of statistics - Minimum / Maximum / Mean / Standard Deviation for:
• Horizontal (radial) offset distance (m)
• Vertical/depth offset (m)
• Fit coherence
• Signal amplitude difference (%)
• Size difference (%)
• Decay difference (%)