Research/Terra/ 131687
Task evidence / contour-map

Generate contour lines of snow accumulation near major US lakes

PassComputational taskUnpublished draft
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The question

131687
Generate contour lines of snow accumulation near major US lakes
Exact submitted task and declared adaptations
Generate contour lines of snow accumulation near major US lakes

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 na_lakes original geometries on the same map. Retain original overlay features matching predicate intersects against each original countries polygon selected by NAME_EN='United States'; duplicated matches count once. Do not clip the line geometries. A dissolved union of the selected country polygons is equivalent for intersects. This is a visual spatial comparison; no invented causal correlation or extra buffer is requested.  As in the released reference, near means visual comparison on the same map, not an invented proximity buffer. Major water bodies means the supplied CEC inventory, not an added size threshold. The seven explicit levels replace the reference's dense five-inch interval as a disclosed presentation convention. Keep the actual 2024-09-30 to 2025-05-20 season, not the reference's stale February plot title. Water data and derived maps are for this benchmark only.



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": "North American lakes, CEC 2023 frozen benchmark source",
    "edition": "CEC North American Environmental Atlas version 4.0 (2023), original benchmark snapshot; benchmark-only use",
    "units": {},
    "collectionId": "blue-generated--[resource id withheld]",
    "itemId": "[resource id withheld]",
    "assetKey": "data"
  },
  {
    "name": "World Bank country boundaries",
    "edition": "GeoBenchX harmonized names",
    "units": {},
    "collectionId": "blue-generated--[resource id withheld]",
    "itemId": "[resource id withheld]",
    "assetKey": "data"
  }
]

Outcome & verification

Independent artifact and delivery checks passed.

Duration
19m 6s
Recorded Blue tool calls
56
Total tokens
2,118,220
Model cost
Not recorded
Application revision
d50497ea9084f29c91b05406688f87035df98d8a
Release
terra-geobenchx-v1

Recorded final answer

Done — I added the 2024‑09‑30 to 2025‑05‑20 snowfall contours in inches and the original CEC lake overlay to your map. All 7 requested contour levels were nonempty, and the lake overlay keeps 7,656 original intersecting features with `benchmark_row_id` retained. Important limit: 1,032,876 snowfall raster cells are unknown from the source mask, so contour lines stop at NoData holes and source edges. The lake layer is only a same-map visual comparison, not proof of a proximity effect or cause. Sources: Blue-hosted benchmark snowfall fixture from NOAA/NWS NOHRSC seasonal snowfall; Blue-hosted CEC North American Environmental Atlas lakes v4.0 (2023); Blue-hosted World Bank country boundaries. Retrieved 2026-10-07 UTC. Next: review the two map layers on the map, or ask if you want a different contour style or an export. ### Limitations - Masked snowfall cells remain unknown and contour lines stop at NoData holes and source coverage edges. - The lake overlay is for same-map visual comparison only; no buffered proximity or causal claim is established. - Masked snowfall cells remain unknown, so contour lines stop at NoData holes and source coverage edges. - The lake overlay is a same-map visual comparison only; it does not establish a measured proximity effect or causation.

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 supplied 2024-09-30 to 2025-05-20 snowfall raster produce inspectable contour lines at the seven explicit inch levels, and can original CEC lake geometries be selected once by intersection with United States polygons without clipping?

assess_trial · completed · assessment: sufficient

The supplied snowfall raster produced 3,396 contour features with a level field in inches and seven distinct nonempty requested levels: 5, 10, 20, 40, 80, 160, and 320. Full-raster statistics reported 1,032,876 missing cells and zero nonfinite cells, so unknown coverage stays unknown rather than zero. The lake selection kept whole original CEC geometries, retained benchmark_row_id, and returned 7,656 features intersecting the dissolved United States geometry without clipping.

assess_result · completed · assessment: sufficient

I delivered the 2024-09-30 to 2025-05-20 snowfall contours in inches and the original CEC lake overlay on the current map. The final contour artifact has 3,396 line features and seven nonempty requested levels, and the final lake overlay has 7,656 original features with benchmark_row_id retained. The source raster statistics report 1,032,876 unknown cells and zero nonfinite cells, so contour coverage stops at NoData holes and source coverage edges.

Recorded workflow

  1. 01

    contours

    Recorded raster-contours · succeeded

  2. 02

    Contour legend classes

    Recorded vector-classify · succeeded

  3. 03

    Snow accumulation contour lines

    Recorded output · succeeded

  4. 04

    Major US lakes overlay

    Recorded output · succeeded

  5. 05

    Snowfall raster coverage statistics

    Recorded output · succeeded

  6. 06

    lakes us

    Recorded vector-spatial-join · succeeded

  7. 07

    snow stats

    Recorded raster-statistics · succeeded

  8. 08

    blue-generated--[resource id withheld]

    Recorded source · succeeded

  9. 09

    blue-generated--[resource id withheld]

    Recorded source · succeeded

  10. 10

    blue-generated--[resource id withheld]

    Recorded source · succeeded

  11. 11

    us filter

    Recorded vector-filter · succeeded

  12. 12

    us union

    Recorded vector-dissolve · succeeded

  13. 13

    contours

    Recorded raster-contours · succeeded

  14. 14

    lakes us

    Recorded vector-spatial-join · succeeded

  15. 15

    snow stats

    Recorded raster-statistics · succeeded

  16. 16

    blue-generated--[resource id withheld]

    Recorded source · succeeded

  17. 17

    blue-generated--[resource id withheld]

    Recorded source · succeeded

  18. 18

    blue-generated--[resource id withheld]

    Recorded source · succeeded

  19. 19

    lakes us

    Recorded output · succeeded

  20. 20

    contours

    Recorded output · succeeded

  21. 21

    snow stats

    Recorded output · succeeded

  22. 22

    us filter

    Recorded vector-filter · succeeded

  23. 23

    us union

    Recorded vector-dissolve · 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 supplied files, and the contour/overlay tools so I can build the exact 2024–25 snowfall contours and put both layers on your map.

  2. Progress update

    I found the Blue analysis tools. Next I’m inspecting the supplied raster/vector sources and the exact processor contracts so I can keep the native grid, mask, contour levels, and lake overlay rules exactly as you specified.

  3. get_map_context

    Recorded tool call · completed

  4. get_collection

    Recorded tool call · completed

  5. get_collection

    Recorded tool call · completed

  6. get_analysis

    Recorded tool call · completed

  7. list_processors

    Recorded tool call · completed

  8. get_collection

    Recorded tool call · completed

  9. list_processors

    Recorded tool call · completed

  10. Progress update

    I found the exact contour processor Blue provides. I’m now checking its schema plus the boundary/lake fields so I can keep the requested seven levels, native mask handling, and United States lake selection without guessing.

  11. get_tool_help

    Recorded tool call · completed

  12. describe_processors

    Recorded tool call · failed

  13. get_collection

    Recorded tool call · completed

  14. get_collection

    Recorded tool call · completed

  15. Progress update

    I confirmed the supplied files are benchmark fixtures, but their published metadata alone doesn’t expose the row fields. I’m using processor schemas and a small private validation next so I can verify the country-name filter and contour output structure before running the full job.

  16. describe_processors

    Recorded tool call · completed

  17. describe_processors

    Recorded tool call · completed

  18. get_tool_help

    Recorded tool call · completed

  19. get_tool_help

    Recorded tool call · completed

  20. Progress update

    The contour processor matches your requested method exactly. I’m now inspecting the supplied raster/vector items directly to verify the raster’s band metadata and the country/lake fields before I freeze the final workflow.

  21. inspect_artifact

    Recorded tool call · failed

  22. inspect_artifact

    Recorded tool call · failed

  23. inspect_artifact

    Recorded tool call · failed

  24. describe_processors

    Recorded tool call · completed

  25. Progress update

    I’ve pinned the study scope to the supplied snowfall raster’s full 2024–25 coverage so the contours keep their original grid and uncut extent. Next I’m running one compact private test that checks both parts together: exact contours from the snowfall raster, and original lake geometries selected by U.S. intersection.

  26. update_analysis_brief

    Recorded tool call · completed

  27. Progress update

    I’m running a compact combined test now. I expect to see only the seven requested contour levels from the snowfall raster, a masked/nonfinite pixel count from the original band, and a lake selection that keeps the original CEC geometries while matching U.S. polygons by intersection.

  28. run_trial

    Recorded tool call · completed

  29. Progress update

    The private test succeeded. I’m checking its preview images now so I can confirm the map behavior before I promote this exact method into the final runnable workflow and add the verified layers to your map.

  30. get_trial_report

    Recorded tool call · completed

  31. Progress update

    The test answered the core method question: all seven requested contour levels are present, the raster unknown count is measured, and the lake selection keeps original geometries with benchmark_row_id. I’m recording that result, then saving a runnable workflow that uses this exact tested method for the final map layers.

  32. assess_trial

    Recorded tool call · completed

  33. get_tool_help

    Recorded tool call · completed

  34. get_analysis

    Recorded tool call · completed

  35. get_tool_help

    Recorded tool call · completed

  36. get_tool_help

    Recorded tool call · completed

  37. get_tool_help

    Recorded tool call · completed

  38. get_tool_help

    Recorded tool call · completed

  39. get_tool_help

    Recorded tool call · completed

  40. get_tool_help

    Recorded tool call · completed

  41. get_tool_help

    Recorded tool call · completed

  42. get_tool_help

    Recorded tool call · completed

  43. list_processors

    Recorded tool call · completed

  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

    I’ve developed the runnable method from the successful full-extent trial. I’m now saving that exact workflow, with a display-ready contour layer for the map legend and a separate supporting raster-stats output for the unknown-pixel count in the final answer.

  51. propose_workflow

    Recorded tool call · completed

  52. execute_workflow

    Recorded tool call · completed

  53. Progress update

    The saved workflow is ready and matches the tested full-extent method, with one added display step for the contour legend. I’m executing it now, then I’ll inspect the final contour, lake overlay, and raster-stats outputs before adding the verified layers to your map.

  54. Progress update

    The workflow finished in the background. I’m inspecting the final outputs now so I can bind the verified contour and lake layers to your map and return the exact artifact IDs and counts.

  55. inspect_workflow_results

    Recorded tool call · completed

  56. inspect_workflow_results

    Recorded tool call · completed

  57. inspect_artifact

    Recorded tool call · completed

  58. inspect_artifact

    Recorded tool call · completed

  59. list_map_layers

    Recorded tool call · completed

  60. inspect_artifact

    Recorded tool call · completed

  61. Progress update

    I have the final artifact IDs and map layers. I’m fetching the finished inspection receipts now so I can verify the delivered fields and counts on the final outputs, not just the workflow run summary.

  62. inspect_artifact

    Recorded tool call · completed

  63. inspect_artifact

    Recorded tool call · completed

  64. inspect_artifact

    Recorded tool call · completed

  65. get_tool_help

    Recorded tool call · completed

  66. Progress update

    I’ve verified the delivered outputs themselves: the final contour layer has 3,396 rows and seven distinct inch levels, the lake overlay has 7,656 original features with unique benchmark_row_id values, and the raster stats table confirms 1,032,876 unknown source pixels. I’m refreshing the brief notes, then I’ll record the final assessed answer object with the verified artifact and map-layer IDs.

  67. get_tool_help

    Recorded tool call · completed

  68. get_analysis

    Recorded tool call · completed

  69. update_analysis_brief

    Recorded tool call · completed

  70. assess_result

    Recorded tool call · completed

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