Research/Terra/ 932053
Task evidence / country-change-selection

How many African power stations are located in countries with significant forest loss

PassComputational taskUnpublished draft
Download evidence JSON ↓

The question

932053
How many African power stations are located in countries with significant forest loss?
Exact submitted task and declared adaptations
How many African power stations are located in countries with significant forest loss?

Task conventions: Significant loss means forest area in 2021 divided by forest area in 1990 is strictly less than 0.79 (more than 21% loss). Use WDI AG.LND.FRST.K2 in square kilometres. The released references offer several incompatible thresholds; this protocol freezes the first reference's 0.79 convention, not any decrease or a percentage-point threshold. Use original country polygons with CONTINENT=Africa. Use exact ISO_A3/Country Code matching. A point qualifies only when strictly within a qualifying original country polygon. Count original point records once, regardless of operational status. Missing observations, nonmatching country codes, nonpositive denominators and nonfinite derived values are unknown, never zero. Points in unknown-measurement countries and points without valid geometry are unknown. Valid points outside all selected geographical polygons do not qualify and are not counted as unknown. Do not infer locations from point country-name attributes or fetch live substitutes. Maps are optional.



Produce an inspectable selected-point artifact retaining original geometry and benchmark_row_id. End with one fenced JSON object: {count: selected original point records, unknown_count: points with unknown eligibility under the stated coverage rule, unlocated_count: original point records lacking valid geometry, coverage_note: string, selection: {collectionId, itemId, assetKey}}. Explain the fixed years, threshold and coverage in the final answer.

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": "African power stations",
    "edition": "USGS 2021 frozen compilation",
    "units": {
      "DsgAttr02": "MW"
    },
    "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"
  },
  {
    "name": "World Bank AG.LND.FRST.K2",
    "edition": "Frozen GeoBenchX World Development Indicators; use 2021",
    "units": {
      "2021": "km\u00b2"
    },
    "collectionId": "blue-generated--[resource id withheld]",
    "itemId": "[resource id withheld]",
    "assetKey": "data"
  }
]

Outcome & verification

Independent artifact and delivery checks passed.

Duration
20m 15s
Recorded Blue tool calls
57
Total tokens
2,837,239
Model cost
Not recorded
Application revision
d50497ea9084f29c91b05406688f87035df98d8a
Release
terra-geobenchx-v1

Recorded final answer

I found 466 African power-station records that meet the fixed rule: forest area in 2021 divided by 1990 is strictly less than 0.79, using exact ISO_A3/Country Code matching and strict point-within-country geometry. Important limitation: 65 records have unknown eligibility, including 31 records without valid geometry and 34 validly located records in 2 African countries where the 1990 WDI forest-area value is missing. Valid points outside all African country polygons were excluded, not counted as unknown. Next: you can inspect the attached selected-point layer for the exact qualifying locations. Sources: USGS 2021 African power stations, frozen Blue benchmark fixture (retrieved 2026-10-07 UTC); World Bank Official Boundaries with GeoBenchX harmonization, frozen Blue benchmark fixture (retrieved 2026-10-07 UTC); World Bank WDI AG.LND.FRST.K2, frozen Blue benchmark fixture using 1990 and 2021 values (retrieved 2026-10-07 UTC). ### Limitations - Uses the supplied frozen USGS 2021 power-station compilation, GeoBenchX harmonized country polygons, and frozen WDI AG.LND.FRST.K2 table. - Two African countries have unknown forest-loss measurement because the 1990 forest-area field is missing, so points within them remain unknown. - Valid points outside all African country polygons are excluded from both count and unknown_count. - Uses only the supplied frozen USGS 2021 power-station compilation, GeoBenchX harmonized country polygons, and frozen WDI AG.LND.FRST.K2 table. - Two African countries had unknown forest-loss measurement because the 1990 forest-area field was missing, so points within them are included in unknown_count rather than treated as zero. - Points lacking valid geometry cannot be located for the strict within-country test and remain unknown. - Valid points outside all African country polygons do not qualify and are not unknown. - Countries with missing values, nonpositive 1990 area, or nonfinite ratios remain unknown rather than counted as qualifying or nonqualifying. - Unknown eligibility applies only to unlocated points and to valid points strictly within African countries whose forest-loss measurement is unknown.

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
466
Reported count
466
Computation verified
Yes
Answer fulfilled
Yes
Full grading and rubric record
{
  "expectedCount": 466,
  "actualCount": 466,
  "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 Africa-wide computation correctly join forest-area data by exact ISO code, select original power-station points strictly within qualifying African country polygons, and separate unknown and unlocated records under the stated rules?

assess_trial · completed · assessment: sufficient

The Africa-wide test answered the method question. The exact ISO join succeeded for all 52 African country polygons: 52 matched input features, 0 unmatched. The derived forest_ratio field is available for 50 countries and null for 2 countries because 1990 forest area is missing there, so those countries remain unknown rather than qualifying or nonqualifying. The strict within workflow produced 466 qualifying original power-station point records. It also produced 34 validly located points strictly within unknown-measurement African countries and 31 unlocated original point records with null geometry-based distance, for 65 total unknown-eligibility points under the stated rule. The qualifying selected-point output preserves original point geometry and benchmark_row_id.

assess_result · failed · requested assessment: sufficient

I verified the finished workflow outputs against the requested rule. The selected qualifying-point artifact contains 466 original point records with preserved geometry and benchmark_row_id. The supporting outputs contain 34 valid points in African countries with unknown forest-loss measurement and 31 original records without valid geometry, so unknown_count is 65 and unlocated_count is 31. The workflow uses original African country polygons, exact ISO_A3/Country Code matching, WDI AG.LND.FRST.K2 values for 1990 and 2021, and a strict forest-area ratio threshold of 2021/1990 < 0.79.

assess_result · completed · assessment: sufficient

I verified the finished workflow outputs against the requested rule. The final selected qualifying-point artifact contains 466 original point records with preserved geometry and benchmark_row_id. The supporting inspected outputs contain 34 valid points in African countries with unknown forest-loss measurement and 31 original records without valid geometry, so unknown_count is 65 and unlocated_count is 31. The workflow uses original African country polygons, exact ISO_A3/Country Code matching, WDI AG.LND.FRST.K2 values for 1990 and 2021, and a strict forest-area ratio threshold of 2021/1990 < 0.79.

Recorded workflow

  1. 01

    African countries

    Recorded vector-filter · succeeded

  2. 02

    African countries with forest area

    Recorded table-attribute-join · succeeded

  3. 03

    Forest ratio

    Recorded vector-field-calculate · succeeded

  4. 04

    World Bank country boundaries

    Recorded source · succeeded

  5. 05

    Qualifying power stations

    Recorded output · succeeded

  6. 06

    Unknown-country power stations

    Recorded output · succeeded

  7. 07

    Unlocated power stations

    Recorded output · succeeded

  8. 08

    Point geometry check

    Recorded vector-nearest-distance · succeeded

  9. 09

    African power stations

    Recorded source · succeeded

  10. 10

    Points matched to qualifying countries

    Recorded vector-spatial-join · succeeded

  11. 11

    Points matched to unknown countries

    Recorded vector-spatial-join · succeeded

  12. 12

    Qualifying countries

    Recorded vector-filter · succeeded

  13. 13

    Selected qualifying points

    Recorded vector-filter · succeeded

  14. 14

    Unknown-country matched points

    Recorded vector-filter · succeeded

  15. 15

    Unknown-measurement countries

    Recorded vector-filter · succeeded

  16. 16

    Unknown valid points

    Recorded vector-filter · succeeded

  17. 17

    Unlocated points

    Recorded vector-filter · succeeded

  18. 18

    Validly located points

    Recorded vector-filter · succeeded

  19. 19

    World Bank forest area

    Recorded source · succeeded

  20. 20

    African countries

    Recorded vector-filter · succeeded

  21. 21

    African countries with forest area

    Recorded table-attribute-join · succeeded

  22. 22

    Forest ratio

    Recorded vector-field-calculate · succeeded

  23. 23

    World Bank country boundaries

    Recorded source · succeeded

  24. 24

    Point geometry check

    Recorded vector-nearest-distance · succeeded

  25. 25

    African power stations

    Recorded source · succeeded

  26. 26

    Points matched to qualifying countries

    Recorded vector-spatial-join · succeeded

  27. 27

    Points matched to unknown countries

    Recorded vector-spatial-join · succeeded

  28. 28

    Qualifying countries

    Recorded vector-filter · succeeded

  29. 29

    Selected qualifying points

    Recorded vector-filter · succeeded

  30. 30

    African countries with forest area

    Recorded output · succeeded

  31. 31

    Forest ratio

    Recorded output · succeeded

  32. 32

    Selected qualifying points

    Recorded output · succeeded

  33. 33

    Unknown valid points

    Recorded output · succeeded

  34. 34

    Unlocated points

    Recorded output · succeeded

  35. 35

    Points matched to unknown countries

    Recorded output · succeeded

  36. 36

    Unknown-country matched points

    Recorded vector-filter · succeeded

  37. 37

    Unknown-measurement countries

    Recorded vector-filter · succeeded

  38. 38

    Unknown valid points

    Recorded vector-filter · succeeded

  39. 39

    Unlocated points

    Recorded vector-filter · succeeded

  40. 40

    Validly located points

    Recorded vector-filter · succeeded

  41. 41

    World Bank forest area

    Recorded source · 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 the saved analysis state, inspect the supplied datasets, then run a small private test before saving the full counting method.

  2. Progress update

    I’ve got the three frozen inputs. Next I’m checking their exact fields and a couple of small samples so the joins and the within-country test use the original data exactly as requested.

  3. get_analysis

    Recorded tool call · completed

  4. get_collection

    Recorded tool call · completed

  5. get_collection

    Recorded tool call · completed

  6. get_collection

    Recorded tool call · completed

  7. get_item

    Recorded tool call · completed

  8. get_item

    Recorded tool call · completed

  9. Progress update

    I’ve confirmed the three frozen sources exist. Now I’m pulling their exact item profiles so I can use the real field names for the Africa filter, ISO code join, year columns, and benchmark_row_id retention.

  10. get_item

    Recorded tool call · completed

  11. update_analysis_brief

    Recorded tool call · completed

  12. update_analysis_brief

    Recorded tool call · completed

  13. list_processors

    Recorded tool call · completed

  14. get_tool_help

    Recorded tool call · completed

  15. get_tool_help

    Recorded tool call · completed

  16. Progress update

    I know the likely processor chain now. I’m checking the exact schemas next, mainly to confirm how “strictly within” is expressed and how unmatched or invalid points are surfaced for the unknown and unlocated counts.

  17. describe_processors

    Recorded tool call · failed

  18. get_tool_help

    Recorded tool call · completed

  19. get_tool_help

    Recorded tool call · completed

  20. describe_processors

    Recorded tool call · completed

  21. describe_processors

    Recorded tool call · completed

  22. get_tool_help

    Recorded tool call · completed

  23. list_processors

    Recorded tool call · completed

  24. describe_processors

    Recorded tool call · completed

  25. get_tool_help

    Recorded tool call · completed

  26. Progress update

    I have the basic join pieces. I’m looking for the exact spatial predicate and any processor that reports missing or invalid point geometry cleanly, because that affects the required unknown and unlocated counts.

  27. Progress update

    I’ve confirmed the spatial join supports a real `within` predicate. I’m fetching the workflow and trial node schemas now so I can build the test and the full run with the correct source-step format instead of guessing.

  28. get_tool_help

    Recorded tool call · completed

  29. get_tool_help

    Recorded tool call · completed

  30. get_tool_help

    Recorded tool call · completed

  31. get_tool_help

    Recorded tool call · completed

  32. Progress update

    The country-side logic is clear. I’m checking one more processor that may preserve rows with missing point geometry, so I can prove the unlocated count instead of assuming it is zero.

  33. describe_processors

    Recorded tool call · completed

  34. describe_processors

    Recorded tool call · completed

  35. get_tool_help

    Recorded tool call · completed

  36. Progress update

    I’ve got the full method assembled. I’m running it privately first, at the actual Africa-wide scope, to verify three things together: the ISO join, the strict-within point selection, and the separate unknown/unlocated handling.

  37. run_trial

    Recorded tool call · completed

  38. Progress update

    The first trial request was blocked by a brief-format issue, not by missing data. I’m correcting the stored study extent to a numeric Africa bbox and retrying the same test.

  39. update_analysis_brief

    Recorded tool call · completed

  40. Progress update

    The full-scope private test finished successfully. I found a complete exact ISO join for 52 African country polygons, 2 African countries with unknown forest-loss measurement, 466 qualifying power-station points, 34 valid points in unknown-measurement countries, and 31 unlocated point records. I’m confirming the saved outputs, then I’ll save the production workflow and verify the final artifact.

  41. get_trial_report

    Recorded tool call · completed

  42. assess_trial

    Recorded tool call · completed

  43. get_tool_help

    Recorded tool call · completed

  44. get_tool_help

    Recorded tool call · completed

  45. Progress update

    The private test supports the method, so I’m turning that exact Africa-wide computation into a saved workflow now. I’m keeping the selected qualifying points as the main output and carrying the unknown and unlocated point sets as supporting evidence for the final count.

  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. get_tool_help

    Recorded tool call · completed

  51. propose_workflow

    Recorded tool call · failed

  52. Progress update

    The draft mostly validated. Blue flagged only two ambiguous requirement bindings, both on the final selected-point output. I’m correcting those exact references and revalidating the same workflow.

  53. propose_workflow

    Recorded tool call · completed

  54. execute_workflow

    Recorded tool call · completed

  55. Progress update

    The saved workflow has finished. I’m checking the exact delivered artifacts now so I can attach the selected qualifying-point output and the verified counts in the final result.

  56. inspect_workflow_results

    Recorded tool call · completed

  57. Progress update

    I already have the tested counts. I’m just pulling the finished workflow’s exact output references now, then I’ll record the final answer against the inspected selected-point artifact.

  58. inspect_workflow_results

    Recorded tool call · completed

  59. Progress update

    I’ve got the finished run receipts. One short follow-up page should include the selected qualifying-point deliverable and the unknown-country support layer, then I can finalize the result.

  60. inspect_workflow_results

    Recorded tool call · completed

  61. get_tool_help

    Recorded tool call · completed

  62. inspect_artifact

    Recorded tool call · completed

  63. inspect_artifact

    Recorded tool call · completed

  64. inspect_artifact

    Recorded tool call · completed

  65. Progress update

    I’m doing the last bounded checks on the finished outputs: one for the qualifying selected points, one for valid unknown-country points, and one for unlocated records. Then I can attach the exact selected artifact and answer.

  66. inspect_artifact

    Recorded tool call · completed

  67. inspect_artifact

    Recorded tool call · completed

  68. inspect_artifact

    Recorded tool call · completed

  69. inspect_workflow_results

    Recorded tool call · completed

  70. Progress update

    I have the final inspected outputs and counts. I’m recording the selected qualifying-point artifact now with the fixed 1990/2021 threshold rule and the verified count, unknown_count, and unlocated_count.

  71. assess_result

    Recorded tool call · failed

  72. Progress update

    Blue needs a preview on the final selected deliverable node itself before it will accept the result. I’m refreshing that one last preview and then I’ll record the final answer.

  73. inspect_artifact

    Recorded tool call · completed

  74. Progress update

    I’ve got the requested final output; Blue just needs the deliverable-node preview receipt itself. I’m fetching that exact preview now, then I’ll finalize the result.

  75. inspect_artifact

    Recorded tool call · completed

  76. Progress update

    The preview requirement is satisfied now. I’m recording the final selected artifact and counts against the finished workflow outputs.

  77. assess_result

    Recorded tool call · completed

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