Research/Terra/ 968087
Task evidence / geographic-heatmap

Generate a heatmap of earthquake occurrences near railway lines in Canada

PassComputational taskUnpublished draft
Download evidence JSON ↓

The question

968087
Generate a heatmap of earthquake occurrences near railway lines in Canada.
Exact submitted task and declared adaptations
Generate a heatmap of earthquake occurrences near railway lines in Canada.

Task conventions: Use the original point and line fixtures with the following precise near-rail convention. Select original earthquake points at planar distance strictly less than 10,000 metres from original railway features whose COUNTRY is CA. Transform original vertices to EPSG:3978 (Canada Atlas Lambert); segments are straight in that projection, with no densification. This explicitly fixes the archived reference's unspecified 10 km buffer projection; it is not an exact geodesic or travel-distance measurement. Include points near Canadian rail even if across an international boundary, matching the railway-buffer selection. Use one unit per event to show occurrences, not magnitude weights: the frozen event file contains negative magnitudes, so this is an explicitly disclosed count-weight adaptation of the archived heatmap. Use original January–February 2025 events, not current earthquakes. Use original point records and the declared attribute/raster selection; do not infer a separate geographic boundary. Unknown country indicators, nonpositive ratio denominators, missing geometry and missing/nonfinite weights are unknown, not zero. Known zero weights remain valid. Exclude valid points outside the specified geography. Include only eligible points with a finite nonnegative weight in the contributing artifact; report other potentially eligible points as unknown. Use this explicit geographic heatmap convention: grid={"bounds": [-18000000, -7325000, 18000000, 7325000], "crs": "EPSG:6933", "resolutionX": 25000, "resolutionY": 25000}, radius 150000 metres = three Gaussian standard deviations. First bin each point into its containing grid cell and sum its weight. Smooth using a normalized separable Gaussian, numerical support four standard deviations, constant-zero exterior; do not renormalize edges. Use both grid resolutions for the two axes; keep original grid alignment. This is a declared metric raster adaptation to the original interactive screen-pixel heatmap, not an equivalent zoom-dependent rendering. Output unit: events per grid cell. Zero cells are valid; this is not density per square kilometre. Do not rescale the values for presentation.



Add the heatmap raster to the map and retain an inspectable selected-point artifact with original geometry and benchmark_row_id. End with one fenced JSON object: {count: contributing point records, unknown_count: records with unknown eligibility or weight, unlocated_count: original points lacking valid geometry, coverage_note: string, selection: {collectionId,itemId,assetKey}, density: {collectionId,itemId,assetKey}, map_layer_id: heatmap_layer_id}. Explain the data edition, numerical weights, grid, smoothing and coverage limitations. The source-point artifact is not itself the requested heatmap.

Delivery format: provide the answer object with all fields specified above as final_response on assess_result, alongside the inspected final artifact_refs. This replaces the JSON-code-block formatting requirement above. Blue attaches your explicit selection to the accepted final answer. Finish with a concise ordinary-language answer agreeing with that selected result; do not duplicate the JSON in chat.

Supplied immutable inputs:
[
  {
    "name": "Earthquake points, frozen 30-day snapshot",
    "edition": "Archive labelled Feb142025; observed event timestamps 2025-01-16 through 2025-02-15 UTC",
    "units": {},
    "collectionId": "blue-generated--[resource id withheld]",
    "itemId": "[resource id withheld]",
    "assetKey": "data"
  },
  {
    "name": "North American Rail Network Lines, frozen GeoBenchX snapshot",
    "edition": "Original pinned GeoBenchX NARN/FRA/BTS snapshot, not a live network",
    "units": {},
    "collectionId": "blue-generated--[resource id withheld]",
    "itemId": "[resource id withheld]",
    "assetKey": "data"
  }
]

Outcome & verification

Independent artifact and delivery checks passed.

Duration
16m 34s
Recorded Blue tool calls
64
Total tokens
2,919,659
Model cost
Not recorded
Application revision
d50497ea9084f29c91b05406688f87035df98d8a
Release
terra-geobenchx-v1

Recorded final answer

Done — the heatmap is on the map, and I kept the selected earthquake points with original geometry and `benchmark_row_id` for inspection. It uses 16 archived Jan–Feb 2025 earthquake events near rail features with `COUNTRY=CA`, with 0 unknown-eligibility records and 0 unlocated source points. Important limitation: this is based on the frozen USGS earthquake snapshot labeled Feb142025 and the frozen GeoBenchX NARN/FRA/BTS rail snapshot, using the declared EPSG:3978 strict `<10 km` planar rule and a fixed EPSG:6933 smoothed raster in events per 25 km cell — not current earthquakes, not geodesic distance, and not the old zoom-dependent screen heatmap. Next: inspect the saved points and the map layer, or ask me for an export or an unsmoothed version. ### Limitations - Uses the supplied frozen earthquake snapshot labelled Feb142025 with observed event timestamps 2025-01-16 through 2025-02-15 UTC and the original pinned GeoBenchX rail snapshot, not current data. - Near-rail selection follows the declared EPSG:3978 planar <10000 metre convention on original transformed vertices with straight segments and no densification; it is not geodesic or travel distance. - The heatmap is a fixed EPSG:6933 metric raster with 25000 metre cells and Gaussian smoothing radius 150000 metres; values are events per grid cell and the display is not zoom-dependent screen rendering. - Uses the archived earthquake snapshot labelled Feb142025 with observed event timestamps 2025-01-16 through 2025-02-15 UTC and the frozen GeoBenchX rail snapshot, not current data. - Near-rail means strict planar distance less than 10000 metres in EPSG:3978 on original transformed vertices with straight segments and no densification; it is not geodesic, travel, or engineering distance. - The heatmap is a fixed EPSG:6933 metric raster with 25000 metre cells and Gaussian smoothing radius 150000 metres; values are events per grid cell, not density per square kilometre, and the display is not the original zoom-dependent screen heatmap.

Independent checks

These checks are separate from the agent's own assessment. A successful job or an assertion of success is not enough to pass.

Expected count
16
Reported count
16
Computation verified
Yes
Answer fulfilled
Yes
Full grading and rubric record
{
  "expectedCount": 16,
  "actualCount": 16,
  "expectedMetrics": null,
  "actualMetrics": null,
  "computationCorrect": true,
  "answerFulfilled": true,
  "adjudication": null,
  "qualification": null,
  "reasons": []
}

Recorded investigation findings

The agent's reported hypotheses and assessments, retained as evidence of its process—not independent proof that the answer is correct. Failed calls retain their requested verdict, not an accepted assessment.

run_trial · failed

Do the original rail COUNTRY values include any unknown indicators that would make earthquake eligibility unknown?

run_trial · completed

Do the original rail COUNTRY values include any unknown indicators that would make earthquake eligibility unknown?

assess_trial · completed · assessment: sufficient

The grouped COUNTRY values in the frozen rail snapshot are CA=64,537, MX=2,529, and US=235,426. The observed COUNTRY field has no null values and no unexpected blank/unknown indicator in this fixture, so COUNTRY-based unknown eligibility is not observed for this task.

run_trial · completed

Does the full method on the frozen fixtures produce the requested selected-point artifact and fixed-grid heatmap using strict EPSG:3978 <10 km distance to COUNTRY=CA rail and count weighting?

assess_trial · completed · assessment: sufficient

The full trial reproduced the requested method on the frozen fixtures. It filtered rail lines to COUNTRY=CA, measured strict planar nearest distance in EPSG:3978 from every earthquake point to original Canadian rail geometry, selected points with dist_ca_rail_m < 10000, and built a point-density raster on the declared EPSG:6933 grid with 25000 metre x/y resolution and radiusM=150000. The selected-point artifact contains 16 original earthquake point records with original geometry and benchmark_row_id preserved, and the measured distances range from 345.62 m to 8985.17 m. The unknown_count table returned 0, and the nearest-distance summary reported unknownSourceCount=0, so no original earthquake points lacked valid geometry in this frozen fixture. The heatmap summary shows pointCount=16, usedPointCount=16, outsideGridCount=0, unknownWeightCount=0, sigmaPixels=[2.0,2.0], and unit='events per grid cell'.

assess_result · failed · requested assessment: sufficient

The delivered selected-point artifact is sufficient. It contains 16 original earthquake point records near Canadian rail, keeps original point geometry and benchmark_row_id, and every selected record has a measured EPSG:3978 distance below 10 km to COUNTRY=CA rail.

assess_result · completed · assessment: sufficient

The delivered selected-point artifact is sufficient. It contains 16 original earthquake point records near Canadian rail, keeps original point geometry and benchmark_row_id, and every selected record has a measured EPSG:3978 distance below 10 km to COUNTRY=CA rail.

assess_result · completed · assessment: sufficient

Delivered the requested heatmap raster and kept the contributing point artifact for inspection. The delivered selection contains 16 original earthquake point records with benchmark_row_id preserved. The delivered raster uses the declared global EPSG:6933 25 km grid, smooths the selected events with radius 150 km Gaussian support, and is already bound to the current map as layer [resource id withheld]. The delivered selection also includes cross-border eligible events near Canadian rail, matching the distance-to-rail rule rather than a separate Canada boundary.

Recorded workflow

  1. 01

    ca rail

    Recorded vector-filter · succeeded

  2. 02

    Selected earthquakes near Canadian rail

    Recorded output · succeeded

  3. 03

    Earthquakes near Canadian rail heatmap

    Recorded output · succeeded

  4. 04

    heatmap density

    Recorded point-density · succeeded

  5. 05

    quake distance

    Recorded vector-nearest-distance · succeeded

  6. 06

    quake points

    Recorded source · succeeded

  7. 07

    rail lines

    Recorded source · succeeded

  8. 08

    selected count

    Recorded table-group-statistics · skipped

  9. 09

    selected points

    Recorded vector-filter · succeeded

  10. 10

    unknown count

    Recorded table-group-statistics · skipped

  11. 11

    unknown points

    Recorded vector-filter · skipped

  12. 12

    ca rail

    Recorded vector-filter · succeeded

  13. 13

    heatmap density

    Recorded point-density · succeeded

  14. 14

    quake distance

    Recorded vector-nearest-distance · succeeded

  15. 15

    quake points

    Recorded source · succeeded

  16. 16

    rail lines

    Recorded source · succeeded

  17. 17

    selected count

    Recorded table-group-statistics · succeeded

  18. 18

    selected points

    Recorded vector-filter · succeeded

  19. 19

    quake distance

    Recorded output · succeeded

  20. 20

    selected points

    Recorded output · succeeded

  21. 21

    selected count

    Recorded output · succeeded

  22. 22

    unknown count

    Recorded output · succeeded

  23. 23

    heatmap density

    Recorded output · succeeded

  24. 24

    heatmap density

    Recorded output · succeeded

  25. 25

    unknown count

    Recorded table-group-statistics · succeeded

  26. 26

    unknown points

    Recorded vector-filter · succeeded

  27. 27

    rail country counts

    Recorded table-group-statistics · succeeded

  28. 28

    blue-generated--[resource id withheld]

    Recorded source · succeeded

  29. 29

    rail country counts

    Recorded output · succeeded

Activity

Recorded actions

Recorded observable actions only, not private reasoning. Raw payloads, geometry, private links and credentials are omitted; full evidence is retained privately. Activity/workflow lists bounded at 500 entries.

  1. Progress update

    I’m checking the saved analysis context, the map state, and the exact source/processor options so I can build the heatmap with the requested fixed projection and grid rules.

  2. Progress update

    I found the Blue analysis tools. Next I’m reading the saved context and the two frozen source datasets so I can match the exact archived-style selection and raster rules before I build anything.

  3. get_analysis

    Recorded tool call · completed

  4. get_map_context

    Recorded tool call · completed

  5. list_map_layers

    Recorded tool call · completed

  6. get_collection

    Recorded tool call · completed

  7. get_collection

    Recorded tool call · completed

  8. Progress update

    I have the two frozen collections. Now I’m pulling small bounded samples so I can confirm the real field names, geometry handling, and whether the archived identifiers needed in the output are present.

  9. get_collection

    Recorded tool call · completed

  10. get_collection

    Recorded tool call · completed

  11. get_item

    Recorded tool call · completed

  12. get_item

    Recorded tool call · completed

  13. list_processors

    Recorded tool call · completed

  14. list_processors

    Recorded tool call · completed

  15. list_processors

    Recorded tool call · completed

  16. list_processors

    Recorded tool call · completed

  17. Progress update

    I’ve confirmed the real source fields: earthquakes include `benchmark_row_id`, `mag`, `longitude`, `latitude`; rail lines include `COUNTRY` and `benchmark_row_id`. Now I’m finding the exact processors for distance selection, point binning, and Gaussian smoothing.

  18. describe_processors

    Recorded tool call · completed

  19. describe_processors

    Recorded tool call · completed

  20. describe_processors

    Recorded tool call · completed

  21. describe_processors

    Recorded tool call · completed

  22. describe_processors

    Recorded tool call · completed

  23. Progress update

    I have enough source evidence to record the brief. I’m saving the goal now with the exact archived-style constraints so the trial and final checks use the same fixed rules.

  24. update_analysis_brief

    Recorded tool call · completed

  25. get_tool_help

    Recorded tool call · completed

  26. get_tool_help

    Recorded tool call · completed

  27. Progress update

    Before I build the final selection, I’m checking one important uncertainty: whether the frozen rail snapshot actually contains unknown `COUNTRY` values. If it doesn’t, unknown eligibility will come only from missing earthquake geometry in this task.

  28. get_tool_help

    Recorded tool call · completed

  29. run_trial

    Recorded tool call · failed

  30. run_trial

    Recorded tool call · completed

  31. get_analysis

    Recorded tool call · completed

  32. Progress update

    Blue rejected the stored scope format, so I’m correcting the brief to the exact CRS84 form and then retrying the evidence check. The analysis itself hasn’t run yet.

  33. update_analysis_brief

    Recorded tool call · completed

  34. Progress update

    The first check is back: the rail snapshot shows only `CA`, `MX`, and `US`, with no null or blank `COUNTRY` values in this frozen file. That means the remaining unknowns should come from earthquake geometry, not rail-country coding. I’m recording that and moving to a full selection-to-heatmap trial.

  35. get_trial_report

    Recorded tool call · completed

  36. assess_trial

    Recorded tool call · completed

  37. get_tool_help

    Recorded tool call · completed

  38. get_tool_help

    Recorded tool call · completed

  39. Progress update

    I’ve confirmed the rail-country edge case. Next I’m running the full private method on the real frozen inputs: Canadian rail filter, EPSG:3978 strict <10 km point selection, explicit unknown-point count, and the fixed EPSG:6933 Gaussian heatmap.

  40. run_trial

    Recorded tool call · completed

  41. Progress update

    The full trial succeeded. It found 16 contributing earthquake points, 0 unknown-eligibility points, and a valid global EPSG:6933 heatmap on the requested 25 km grid. I’m recording that result, then I’ll save the exact tested method as the production workflow and run it for delivery.

  42. assess_trial

    Recorded tool call · completed

  43. Progress update

    I’ve got a tested full-area method now. I’m reading the proposal schema for the exact fields, then I’ll save the workflow from this trial without changing the science.

  44. get_tool_help

    Recorded tool call · completed

  45. get_tool_help

    Recorded tool call · completed

  46. get_tool_help

    Recorded tool call · completed

  47. get_tool_help

    Recorded tool call · completed

  48. get_tool_help

    Recorded tool call · completed

  49. get_tool_help

    Recorded tool call · completed

  50. Progress update

    The method is tested, so I’m saving that exact computation as the production workflow now. I’m keeping the user’s fixed projection, strict `<10 km` rule, count weighting, and declared grid unchanged.

  51. propose_workflow

    Recorded tool call · failed

  52. Progress update

    The draft failed because one fixed-parameter path was malformed. I’m correcting the contract paths and resaving the same workflow draft now.

  53. propose_workflow

    Recorded tool call · completed

  54. execute_workflow

    Recorded tool call · completed

  55. Progress update

    The saved workflow appears to have finished in the background after the interruption. I’m inspecting the delivered outputs now, then I’ll bind the heatmap to the map and finalize the result.

  56. inspect_workflow_results

    Recorded tool call · completed

  57. get_analysis

    Recorded tool call · completed

  58. list_map_layers

    Recorded tool call · completed

  59. Progress update

    I have the finished outputs and the heatmap layer ID from the workflow receipt. I’m doing the last bounded inspections now: selected points, final raster, the count tables, and the live map layer list.

  60. inspect_artifact

    Recorded tool call · completed

  61. inspect_artifact

    Recorded tool call · completed

  62. inspect_artifact

    Recorded tool call · failed

  63. inspect_artifact

    Recorded tool call · failed

  64. list_map_layers

    Recorded tool call · completed

  65. Progress update

    I’m refreshing the finished artifacts directly by their saved identities so I can verify the selected points, the raster values, and the live layer binding without relying on stale workflow state.

  66. inspect_artifact

    Recorded tool call · completed

  67. inspect_artifact

    Recorded tool call · completed

  68. inspect_artifact

    Recorded tool call · completed

  69. list_map_layers

    Recorded tool call · completed

  70. inspect_artifact

    Recorded tool call · completed

  71. Progress update

    I already have the final deliverables and map layer, but I’m fetching the two count tables from the finished workflow so the final response uses the delivered run’s own counts, not the earlier trial.

  72. inspect_workflow_results

    Recorded tool call · failed

  73. Progress update

    I’ve resolved the planning uncertainties, so I’m refreshing the brief to match what the evidence actually established before I record the final assessment.

  74. update_analysis_brief

    Recorded tool call · completed

  75. Progress update

    I’m pulling the finished inspection receipts now so the final assessment attaches the current selected points, heatmap raster, and supporting count evidence.

  76. inspect_artifact

    Recorded tool call · completed

  77. inspect_artifact

    Recorded tool call · completed

  78. inspect_artifact

    Recorded tool call · completed

  79. inspect_artifact

    Recorded tool call · completed

  80. Progress update

    I have the point and raster inspections. I’m fetching the nearest-distance summary once more from the delivered run so the final assessment can state the unlocated-point count from the actual published workflow context.

  81. inspect_artifact

    Recorded tool call · completed

  82. Progress update

    I’m recording the selected-point result first, then I’ll record the heatmap result with the final answer object attached.

  83. assess_result

    Recorded tool call · failed

  84. assess_result

    Recorded tool call · completed

  85. Progress update

    I’m recording the final heatmap result now, with the answer object bound to the delivered point artifact, raster artifact, and live map layer.

  86. assess_result

    Recorded tool call · completed

|||

© 2026 Exia Labs, Inc.