{
  "version": 1,
  "date": "2026-10-27",
  "formation": "Red Jacket",
  "sourceUrl": "https://services3.arcgis.com/zcv98lgAl8xQ04cW/arcgis/rest/services/SPFPS_TVD_SK_data/FeatureServer/0",
  "sourceArchiveEntry": "SE_Sask_3D_Model_Data/research_paleo/model/formation_tops_raw.geojson",
  "sourceRawSHA256": "cb6bfcc073b2e7a48a632552a1b9ac84e1bf4464d81985c2bf74a1f6696a1414",
  "originalModelSHA256": "8ce771d0bb2054b2b287da01acf9f6af91d10e2ad725f531f94609d2d27c1c10",
  "sourceField": "Red_Jacket",
  "sourceDepthType": "TVD relative to KB",
  "horizontalCRS": "EPSG:2957 \u2014 NAD83(CSRS) / UTM zone 13N",
  "verticalReference": "Signed regional structure elevation; well controls use Kb_Elev \u2212 TVD in metres. Geodetic vertical datum realization unspecified in source metadata.",
  "methods": [
    "Red Jacket is an additional top-only surface interpolated from the retained SPFPS public TVD formation picks; the original twenty regional surfaces are unchanged.",
    "Top elevation = source KB elevation minus Red_Jacket true vertical depth. Elevations retain the source KB vertical reference and are not independently geodetically certified.",
    "Use the accepted original model control positions by exact source FID. Reject nonpositive or nonnumeric picks, invalid KB and a pick more than 10 m deeper than a positive reported TVD TD. Missing TD does not invalidate an otherwise valid top.",
    "Collapse coincident positions (0.1 m rounding) by median top elevation. Interpolate linearly on a Delaunay triangulation, sampled onto the original 2 km grid.",
    "Retain only grid nodes inside the original study boundary and control convex hull, within 15 km of a control and in a triangle whose longest edge is at most 30 km. No extrapolation fills unsupported cells. These are regional interpolation limits, not a claim of local reservoir accuracy; areas farther than 10 km from a control require particular caution.",
    "Omit grid nodes where the independently interpolated Red Jacket top lies more than 25 m above the existing Jurassic top; this is a conservative consistency screen, not a correction to either source. Smaller discrepancies are within the selected half-contour-interval tolerance and do not establish precise contact separation.",
    "The finite-grid boundary marks interpolation support, not a Red Jacket depositional or erosional edge. No thickness, base, net pay, fluid contact or connected reservoir volume is inferred.",
    "Pool polygons are independently mapped administrative footprints draped onto this regional top for visualization; their geometry does not establish reservoir depth or hydraulic connection."
  ],
  "stats": {
    "positiveSourcePicks": 1883,
    "outsideAcceptedModelControls": 59,
    "invalidKB": 0,
    "pickBelowReportedTD": 0,
    "acceptedPickRecords": 1824,
    "uniqueControlPositions": 1824,
    "duplicatePositionGroups": 0,
    "maxSamePositionPickSpreadM": 0.0,
    "gridNodesOmittedForJurassicOrderConflictAbove25M": 55,
    "finiteGridNodes": 11542,
    "topRangeM": [
      -905.9,
      120.9
    ],
    "validation": {
      "method": "deterministic five-fold held-out interpolation",
      "predictedControls": 1749,
      "medianAbsoluteErrorM": 3.14,
      "p90AbsoluteErrorM": 10.37,
      "rmseM": 8.89,
      "qualification": "Diagnostic on historical picks, not local prediction intervals or independent validation."
    }
  },
  "attribution": "Contains information licensed under the Government of Saskatchewan Standard Unrestricted Use Data Licence (Version 2.0)."
}