{ "schemaVersion": "spacetime.benchmark.v1", "id": "OJAI-COMP-001", "title": "Ojai / CA-33 terrain compiler", "measuredAt": "2026-10-20T19:34:09.410Z", "classification": "Real-data local benchmark; injected faults tested separately", "dataset": { "provider": "USGS 3D Elevation Program", "sourceUrl": "https://elevation.nationalmap.gov/arcgis/rest/services/3DEPElevation/ImageServer", "width": 512, "height": 512, "crs": "EPSG:26911", "verticalDatum": "NAVD88", "pixelSpacingM": 15.446957781427955, "captureDate": null, "retrievedAt": "2026-10-20T19:27:37.644758+00:00", "sourceSha256": "b7c5c094915a628b74c1a0d72fcd612c6458b45f233256e849691c636ec61fcb" }, "environment": { "runtime": "v24.19.0", "platform": "linux x64", "os": "Linux 6.18.55", "cpu": "INTEL(R) XEON(R) PLATINUM 8573C", "logicalCpuCount": 9, "process": "single Node.js process; warm in-memory numeric lookup; no browser/GPU/network" }, "metrics": [ { "id": "pack-size", "label": "Compiled terrain pack", "value": 1.0007648468017578, "unit": "MiB", "meaning": "1,049,378 bytes: explicit metadata and 262,144 Float32 heights." }, { "id": "query-p95", "label": "Local lookup p95", "value": 1.356000000015456, "unit": "µs", "meaning": "10,000 warm in-memory bilinear lookups; per-call timer included. Not end-to-end SDK, network, browser or device latency." }, { "id": "coverage", "label": "Finite source cells", "value": 100, "unit": "%", "meaning": "262,144 of 262,144 retained cells finite. This is grid completeness, not mission or sensor coverage." }, { "id": "roundtrip", "label": "Serialization difference", "value": 0, "unit": "m", "meaning": "Maximum absolute difference across all retained Float32 cells after pack decode. This is exact serialization, not ground accuracy." } ], "faultChecks": [ { "name": "Corrupted bytes", "status": "blocked", "meaning": "Injected bit flip fails expected SHA-256 before sampling." }, { "name": "Wrong horizontal frame", "status": "blocked", "meaning": "Injected incompatible frame is refused; runtime does not guess a projection." }, { "name": "Wrong vertical datum", "status": "blocked", "meaning": "Injected unresolved height reference is refused." }, { "name": "Stale receipt", "status": "blocked", "meaning": "Injected stale retrieval receipt fails the declared 30-day test policy; this is not a source-acquisition freshness claim." }, { "name": "Unknown acquisition date", "status": "blocked", "meaning": "Actual mixed-mosaic acquisition date is unknown; strict known-capture-date policy refuses it." }, { "name": "Incorrect payload identity", "status": "blocked", "meaning": "Injected lineage mismatch is refused even with a recomputed outer digest." }, { "name": "Outside coverage", "status": "blocked", "meaning": "Out-of-extent query returns unknown; no extrapolation." }, { "name": "Invalid coordinate", "status": "blocked", "meaning": "Nonfinite coordinate returns unknown." }, { "name": "Missing terrain cell", "status": "blocked", "meaning": "Injected missing cell returns unknown; validity is preserved." } ], "reproducibility": { "command": "node scripts/benchmarks/run.mjs --output /tmp/spacetime-ojai-repro", "sourceCommit": null, "sourceCommitMeaning": "Exact source file SHA-256 digests are recorded below; no fabricated commit identity.", "scriptHashes": { "runtime.mjs": "0a4a43fbe6576aeda0edf1065e8deea8991536d494ee41e14ddb9881dbeded3c", "run.mjs": "7f9466e13bc5c23f7c44791b08b64373336f4a7e559994dba7e021390fa106eb" }, "seed": "LCG seed20261020; state=(1664525*state+1013904223) mod2^32; fractional pixel-center positions in retained grid", "sampleCount": 10000, "warmupCount": 1000, "encodeMeasuredRuns": 10, "analyticalOracle": "2x2 planar grid: midpoint15m and endpoint0/30m recovered exactly; outside samples unknown", "receiptPolicy": { "frame": "EPSG:26911", "verticalDatum": "NAVD88", "evaluationTime": "2026-10-20T19:27:37.644758+00:00", "maxReceiptAgeDays": 30, "requireCaptureDate": false }, "packSha256": "34ca012965ce7688eaa59eb8f3278e8f61b6f57bb0faec05a207e2990e11c100", "networkCallsDuringReplay": 0, "offlineReplaySamples": 100, "offlineMethod": "Same runtime evaluated in isolated JavaScript realm without fetch, XMLHttpRequest, WebSocket, require or imports; 100 answers equal ordinary execution. Not an OS-level network-disabled device test." }, "details": { "queryP50Us": 0.572000000005346, "queryP95Us": 1.356000000015456, "queryP99Us": 1.7789999999990869, "encodeP50Ms": 0.504012000000003, "encodeP95Ms": 0.9789200000000022, "rawJsonBaselineBytes": 4738377, "rawPackBytes": 1049378, "jsonToPackRatio": 4.515414845746719, "gzipJsonBytes": 1558405, "gzipPackBytes": 891087, "consistency": { "count": 16, "rmsDifferenceM": 0.6362206851154746, "maxAbsDifferenceM": 1.7829589845017608, "scope": "Same-source service sampling consistency; not independent accuracy.", "comparisons": [ { "x": 288082.1834802394, "y": 3819022.7233793302, "gridM": 385.6227722167918, "epqsM": 385.167144775, "differenceM": 0.4556274417918189 }, { "x": 290059.3940762622, "y": 3819022.7233793302, "gridM": 834.5682373047135, "epqsM": 833.62322998, "differenceM": 0.9450073247135151 }, { "x": 292036.604672285, "y": 3819022.7233793302, "gridM": 913.146850585973, "epqsM": 912.567443848, "differenceM": 0.5794067379729313 }, { "x": 294013.81526830775, "y": 3819022.7233793302, "gridM": 1178.326416015641, "epqsM": 1178.210083008, "differenceM": 0.11633300764083288 }, { "x": 288082.1834802394, "y": 3817045.5127833076, "gridM": 592.6013183595018, "epqsM": 590.818359375, "differenceM": 1.7829589845017608 }, { "x": 290059.3940762622, "y": 3817045.5127833076, "gridM": 341.99154663084437, "epqsM": 342.408477783, "differenceM": -0.4169311521556551 }, { "x": 292036.604672285, "y": 3817045.5127833076, "gridM": 575.5944824217761, "epqsM": 575.815490723, "differenceM": -0.22100830122394655 }, { "x": 294013.81526830775, "y": 3817045.5127833076, "gridM": 577.7882080078803, "epqsM": 577.958496094, "differenceM": -0.17028808611974 }, { "x": 288082.1834802394, "y": 3815068.3021872845, "gridM": 297.1884460448268, "epqsM": 298.379058838, "differenceM": -1.1906127931732158 }, { "x": 290059.3940762622, "y": 3815068.3021872845, "gridM": 218.5131072998017, "epqsM": 218.467895508, "differenceM": 0.0452117918017052 }, { "x": 292036.604672285, "y": 3815068.3021872845, "gridM": 304.6144104004416, "epqsM": 304.747589111, "differenceM": -0.13317871055841124 }, { "x": 294013.81526830775, "y": 3815068.3021872845, "gridM": 245.68199157714616, "epqsM": 245.671310425, "differenceM": 0.010681152146162276 }, { "x": 288082.1834802394, "y": 3813091.091591262, "gridM": 208.5193176269486, "epqsM": 208.122467041, "differenceM": 0.3968505859486129 }, { "x": 290059.3940762622, "y": 3813091.091591262, "gridM": 205.15071105956915, "epqsM": 205.124160767, "differenceM": 0.026550292569140765 }, { "x": 292036.604672285, "y": 3813091.091591262, "gridM": 226.62341308593528, "epqsM": 226.606704712, "differenceM": 0.016708373935273357 }, { "x": 294013.81526830775, "y": 3813091.091591262, "gridM": 205.42506408691378, "epqsM": 205.423538208, "differenceM": 0.001525878913781753 } ] }, "receipts": [ { "name": "source-dem.tif", "bytes": 1049864, "sha256": "b7c5c094915a628b74c1a0d72fcd612c6458b45f233256e849691c636ec61fcb" }, { "name": "terrain.f32", "bytes": 1048576, "sha256": "996a01f14f93cc2d27a9e3386c5cef4558a27d3be68ffa1023ff08900714c0d1" }, { "name": "source-manifest.json", "bytes": 3002, "sha256": "04de59ba4823b3a6bda342ba7ce7f6b389bc53457e8bdbe15e7bff789d359a3d" }, { "name": "epqs-checks.json", "bytes": 17646, "sha256": "9a15a46bacd92efb28177cc692c084f5768f222554a10e20540dd930dee7fcc9" }, { "name": "imagery.jpg", "bytes": 347659, "sha256": "e62e7ed64594e16565192afdbefd8ea76090422fead56f6ea55409630bbe52c9" }, { "name": "imagery-manifest.json", "bytes": 2241, "sha256": "3c31571b3ab12fd4595b134cdffc39bcf7b1e9bc024d4e2f1f6304d584547728" }, { "name": "routes.json", "bytes": 4670, "sha256": "42f84418fbc5415c2302e20a89da79ffe3146f21ce02e738d28670d0c5d0416e" } ], "checksum": 4937496.440923276 }, "limitations": [ "No independent surveyed control or field navigation validation. Absolute terrain accuracy and positioning integrity are not established.", "The export samples a mixed-resolution USGS mosaic at 15.447 m spacing; spacing is not native source resolution or accuracy.", "Acquisition date is not established per pixel. Retrieval time is not capture time; terrain is not current-conditions evidence.", "EPQS comparisons use the same USGS source family and compare sampling behavior, not independent accuracy.", "Injected faults test declared software behavior; they do not establish real-world detection rates or an integrity guarantee.", "Timing measures warm local numeric lookups and in-memory encoding on the recorded host; it excludes download, reprojection, source decoding and real-world data admission.", "Offline evidence is capability-isolated local replay, not a disconnected physical-device or navigation test." ], "artifacts": [ { "label": "Full results JSON", "href": "/spacetime/benchmarks/ojai-ca33-v1/results.json" }, { "label": "Reproduction bundle", "href": "/spacetime/benchmarks/ojai-ca33-v1/reproduce.zip" }, { "label": "Compiled terrain pack", "href": "/spacetime/benchmarks/ojai-ca33-v1/pack.bin" }, { "label": "Source and frame manifest", "href": "/spacetime/benchmarks/ojai-ca33-v1/source-manifest.json" }, { "label": "Retained source raster", "href": "/spacetime/benchmarks/ojai-ca33-v1/source-dem.tif" }, { "label": "Sampling check evidence", "href": "/spacetime/benchmarks/ojai-ca33-v1/sampling-consistency.json" }, { "label": "Aligned NAIP imagery", "href": "/spacetime/benchmarks/ojai-ca33-v1/imagery.jpg" }, { "label": "Imagery source receipt", "href": "/spacetime/benchmarks/ojai-ca33-v1/imagery-manifest.json" }, { "label": "Representation fidelity study", "href": "/spacetime/benchmarks/ojai-ca33-v1/terrain-fidelity.json" } ] }