Research/Terra/ 251255
Task evidence / contour-map

Make contour lines of snow accumulation for areas with railway stations in the USA

PassComputational taskUnpublished draft
Download evidence JSON ↓

The question

251255
Make contour lines of snow accumulation for areas with railway stations in the USA
Exact submitted task and declared adaptations
Make contour lines of snow accumulation for areas with railway stations in the USA

Task conventions: Use band 1 of the frozen snow raster at the original grid without resampling, smoothing or clipping. Draw the explicit contour levels [5, 10, 20, 40, 80, 160, 320] in inches. These levels are a disclosed evaluation convention, not a requested interval. Use piecewise-linear marching-squares isolines through pixel-center values, low-valued connectivity at ambiguous saddles. Respect the native mask, NoData and nonfinite cells; do not bridge holes or extrapolate at the outside edge. Apply any source scale and offset. NoData means unknown, never zero. Preserve source coverage; levels outside the observed range may have no line. Do not substitute a current raster. Count nonempty requested contour LEVELS, not polyline fragments. The population-count raster, where supplied, is people per original cell; do not label it population density. Overlay the supplied stations original geometries on the same map. Retain every original overlay row, including those outside the raster; disclose their lack of raster coverage. This is a visual spatial comparison; no invented causal correlation or extra buffer is requested. 



Deliver an inspectable vector contour artifact and add it to the map with a level/units legend. End with one fenced JSON object containing: count (number of nonempty requested levels), unknown_count (number of masked or nonfinite source pixels), coverage_note, selection: {collectionId,itemId,assetKey}, level_field, feature_count (actual contour feature rows), map_layer_id. Also include overlay: {selection: {collectionId,itemId,assetKey}, map_layer_id, count}, retaining original benchmark_row_id. Explain the source season/year, units, missing coverage, and visual relationship where an overlay is requested.

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": "US snowfall, 2024\u201325 frozen season",
    "edition": "2024-09-30 to 2025-05-20",
    "units": {
      "band1": "inches"
    },
    "collectionId": "blue-generated--[resource id withheld]",
    "itemId": "[resource id withheld]",
    "assetKey": "data"
  },
  {
    "name": "Amtrak railway stations",
    "edition": "USDOT BTS frozen GeoBenchX 2025 snapshot",
    "units": {},
    "collectionId": "blue-generated--[resource id withheld]",
    "itemId": "[resource id withheld]",
    "assetKey": "data"
  }
]

Outcome & verification

Independent artifact and delivery checks passed.

Duration
14m 29s
Recorded Blue tool calls
41
Total tokens
1,607,392
Model cost
Not recorded
Application revision
d50497ea9084f29c91b05406688f87035df98d8a
Release
terra-geobenchx-v1

Recorded final answer

Done — the 2024-09-30 to 2025-05-20 snowfall contours and the Amtrak station overlay are on your map. Band 1 was used in inches, and all 7 requested contour levels produced lines. The contour layer has 3,396 line features. Missing raster coverage stays unknown: 1,032,876 source pixels are masked or nonfinite, and 52 station rows have no raster value at their locations. The station overlay kept all 1,020 original rows, including `benchmark_row_id`. Visually, stations appear across both lower- and higher-snow zones, with the tighter higher-value contours concentrated mainly in mountain and northern snow belts. If you want, I can also make a separate review layer for the 52 stations with unknown raster coverage. ### Limitations - This is a visual spatial comparison only; it does not establish causation or service impact. - Masked or nonfinite raster cells remain unknown, not zero, and may split or open contour lines. - Contour feature_count counts line fragments, not requested levels or connected isolines. - Contour feature_count counts 3396 line fragments, not connected isolines. - Fifty-two station rows have unknown raster coverage at their point locations.

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
7
Reported count
7
Computation verified
Yes
Answer fulfilled
Yes
Full grading and rubric record
{
  "expectedCount": 7,
  "actualCount": 7,
  "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 · completed

Does the full-source method produce inspectable snowfall contours at the requested inch levels while preserving every station row and explicitly showing unknown raster coverage at station locations?

assess_trial · completed · assessment: sufficient

The full-source trial answered the method question. Whole-raster band 1 statistics reported minimum 0.0 inches, maximum 809.6145629882812 inches, valid_count 510624, and missing_count 1032876 with scale 1 and offset 0. The contour output kept the requested explicit levels and produced nonempty lines at all 7 requested levels, with feature rows carrying contour_id and numeric level in inches. The station sampling output preserved all 1020 original point rows, retained benchmark_row_id, and left 52 sampled snow values null where raster coverage was unknown at the station location.

assess_result · failed · requested assessment: sufficient

I delivered the requested inspectable contour vector and station overlay on the map. The contours use the supplied frozen-season snowfall raster from 2024-09-30 to 2025-05-20, band 1 in inches, and all 7 requested levels are nonempty. The contour artifact has 3396 line rows with level field 'level' in inches. The source raster has 1032876 masked or nonfinite unknown cells out of 1543500 total cells. The station overlay keeps all 1020 original rows and benchmark_row_id, and 52 station rows have unknown raster coverage at their point locations. Visually, stations span both low- and high-snow contour zones, with denser high-value contours concentrated in major mountain and northern snow belts.

assess_result · completed · assessment: sufficient

I delivered the requested inspectable contour vector and station overlay on the map. The contours use the supplied frozen-season snowfall raster from 2024-09-30 to 2025-05-20, band 1 in inches, and all 7 requested levels are nonempty. The contour artifact has 3396 line rows with level field 'level' in inches. The source raster has 1032876 masked or nonfinite unknown cells out of 1543500 total cells. The station overlay keeps all 1020 original rows and benchmark_row_id, and 52 station rows have unknown raster coverage at their point locations. Visually, stations span both low- and high-snow contour zones, with denser high-value contours concentrated in major mountain and northern snow belts.

Recorded workflow

  1. 01

    Snowfall contours

    Recorded output · succeeded

  2. 02

    Amtrak stations with snowfall sample

    Recorded output · succeeded

  3. 03

    Snowfall raster statistics

    Recorded output · succeeded

  4. 04

    Snowfall contour lines

    Recorded raster-contours · succeeded

  5. 05

    Supplied snowfall raster

    Recorded source · succeeded

  6. 06

    Whole-raster snow statistics

    Recorded raster-statistics · succeeded

  7. 07

    Stations with sampled snowfall

    Recorded raster-sample · succeeded

  8. 08

    Supplied Amtrak stations

    Recorded source · succeeded

  9. 09

    Snowfall contour lines

    Recorded raster-contours · succeeded

  10. 10

    Supplied snowfall raster

    Recorded source · succeeded

  11. 11

    Whole-raster snow statistics

    Recorded raster-statistics · succeeded

  12. 12

    Stations with sampled snowfall

    Recorded raster-sample · succeeded

  13. 13

    Supplied Amtrak stations

    Recorded source · succeeded

  14. 14

    Whole-raster snow statistics

    Recorded output · succeeded

  15. 15

    Whole-raster snow statistics

    Recorded output · succeeded

  16. 16

    Snowfall contour lines

    Recorded output · succeeded

  17. 17

    Snowfall contour lines

    Recorded output · succeeded

  18. 18

    Stations with sampled snowfall

    Recorded output · succeeded

  19. 19

    Stations with sampled snowfall

    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’ll check what analysis state already exists, then look up the exact Blue tools for raster contours, inspection, map layers, and final result recording.

  2. Progress update

    I found the core Blue analysis tools. Next I’ll read the retained analysis state, inspect the supplied raster and station source metadata, and discover the exact contour/vector processors before I build the method.

  3. get_analysis

    Recorded tool call · completed

  4. get_collection

    Recorded tool call · completed

  5. get_collection

    Recorded tool call · completed

  6. list_processors

    Recorded tool call · completed

  7. list_processors

    Recorded tool call · completed

  8. describe_processors

    Recorded tool call · completed

  9. get_tool_help

    Recorded tool call · completed

  10. get_map_context

    Recorded tool call · completed

  11. describe_processors

    Recorded tool call · completed

  12. Progress update

    I found the contour processor Blue already has. Now I’m checking the exact processor contracts so I can keep the original raster grid, levels, masking behavior, and a separate station overlay that preserves every row.

  13. Progress update

    I’ve got the source metadata and the exact contour processor. I’m recording the analysis goal now, with final checks that match your contour rules and the required station overlay.

  14. update_analysis_brief

    Recorded tool call · completed

  15. get_tool_help

    Recorded tool call · completed

  16. Progress update

    I’ve got enough to test the method directly. I expect the full-source trial to show three key things: the raster’s true data range and missing-cell count, contour lines only at requested levels that actually occur, and a station overlay that keeps every row while marking locations with unknown raster coverage.

  17. run_trial

    Recorded tool call · completed

  18. Progress update

    The method worked on the full supplied USA data: the raster stats came back, all 7 requested contour levels produced lines, and the station sample kept all 1,020 rows with 52 unknown raster values. I’m recording that trial, then I’ll save the tested production workflow and deliver the verified map layers.

  19. get_tool_help

    Recorded tool call · completed

  20. get_tool_help

    Recorded tool call · completed

  21. get_tool_help

    Recorded tool call · completed

  22. get_tool_help

    Recorded tool call · completed

  23. get_tool_help

    Recorded tool call · completed

  24. get_tool_help

    Recorded tool call · completed

  25. get_tool_help

    Recorded tool call · completed

  26. get_tool_help

    Recorded tool call · completed

  27. get_tool_help

    Recorded tool call · completed

  28. assess_trial

    Recorded tool call · completed

  29. Progress update

    I’ve finished the method check. Next I’m saving the exact tested full-USA computation as the production workflow, with the same fixed raster, same contour levels, and a separate station overlay that keeps every row.

  30. propose_workflow

    Recorded tool call · completed

  31. execute_workflow

    Recorded tool call · completed

  32. inspect_workflow_results

    Recorded tool call · completed

  33. Progress update

    The production run finished in the background. I’m inspecting the exact final outputs now so I can bind the right contour artifact, station overlay, and map layers to the accepted result.

  34. Progress update

    I already have the finished workflow outputs and map layer IDs. I’m doing the last bounded inspections now so the accepted result uses the exact final contour artifact, the exact station overlay artifact, and the verified counts from this production run.

  35. inspect_artifact

    Recorded tool call · completed

  36. inspect_artifact

    Recorded tool call · completed

  37. inspect_artifact

    Recorded tool call · completed

  38. inspect_artifact

    Recorded tool call · completed

  39. inspect_artifact

    Recorded tool call · completed

  40. wait_for_jobs

    Recorded tool call · failed

  41. Progress update

    I have the final artifact IDs and map layer IDs. I’m letting the last bounded inspections finish now so the accepted result uses the exact final counts and current field checks from this production run.

  42. inspect_artifact

    Recorded tool call · completed

  43. inspect_artifact

    Recorded tool call · completed

  44. Progress update

    The inspection jobs are finished. I’m fetching the final immutable receipts now: contour fields and preview, raster stats row, station preview, and a sample of the stations with unknown raster coverage.

  45. inspect_artifact

    Recorded tool call · completed

  46. inspect_artifact

    Recorded tool call · completed

  47. get_analysis

    Recorded tool call · completed

  48. get_tool_help

    Recorded tool call · completed

  49. Progress update

    I’ve finished the current inspections. I’m checking the exact assess_result shape now so I can bind the final contour artifact, the station overlay artifact, and the machine-readable answer object in one accepted result.

  50. get_tool_help

    Recorded tool call · completed

  51. Progress update

    I’ve got everything needed for the final assessment. I’m refreshing the brief notes one last time so the retained analysis matches the finished evidence, then I’ll record the accepted result with the exact final artifact refs.

  52. update_analysis_brief

    Recorded tool call · completed

  53. Progress update

    I’ve verified the final outputs against the requested contour rules and the overlay checks. I’m recording the accepted result now with the exact final contour artifact, the exact station overlay artifact, and the map layer IDs already bound on your map.

  54. assess_result

    Recorded tool call · failed

  55. Progress update

    Blue rejected the assessment because it wants the stored acceptance conditions addressed exactly. I’m correcting that now with the same evidence and the exact required condition list.

  56. assess_result

    Recorded tool call · completed

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