SPFPS MISSISSIPPIAN MAP DATA — VERIFIED MANIFEST

Downloaded UTC: 2026-10-22T18:35:23.067668+00:00
Extent (W,S,E,N): [-105.0, 49.0, -101.2, 51.0]
Source: https://gis.saskatchewan.ca/egis/rest/services/Economy/Mississippian/FeatureServer
Publication: Marsh, A. and Love, M. (2014), Regional Stratigraphic Framework of the Phanerozoic in Saskatchewan, Open File 2014-1, 156 maps

Use manifest.json for plotting. Each unit has isopach and zero_edge file entries.
Files ending _raw.geojson retain complete queried features; other GeoJSON files are clipped.
No structure layers are included. Isopachs are gross thickness in metres.
Source datum: NAD83(CSRS)/UTM zone13N (EPSG2957; legacy WKID2151).
Output GeoJSON: longitude, latitude in EPSG4326.

UNIT | ISOPACH ID | ZERO-EDGE ID | INTERVAL (m) | REGULAR CONTOURS IN REQUESTED RECTANGLE (m) | EDGE ZLEVEL
mississippian | 4 | 5 | 25 | 25–575 | [1.9]
ratcliffe | 24 | 25 | 5 | 5–60 | [1.5]
midale_evaporite | 28 | 29 | 2 | 2–18 | [0.8]
midale | 32 | 33 | 5 | 5–35 | [0.6]
frobisher_evaporite | 40 | 41 | 2 | 2–10 | [1]
frobisher | 44 | 45 | 10 | 10–90 | [1.5]
kisbey | 48 | 49 | 5 | 5–35 | [0.4]
alida | 52 | 53 | 10 | 10–110 | [1.2]
tilston | 56 | 57 | 10 | 10–120 | [1]
souris_valley | 60 | 61 | 20 | 20–160 | [1.9]
bakken | 68 | 69 | 5 | 5–70 | [0.5]

EDGE LABEL: Mapped unit limit (SPFPS Zero Edge; origin not classified)

CAUTIONS
- Gross mapped stratigraphic thickness, not net pay, reservoir-quality thickness, depositional thickness restored for erosion, or recoverable-oil volume.
- 2 km regional grid and kriging do not resolve all small traps, narrow channels, facies changes or small preserved remnants.
- Low positive ZLEVEL values shared by isopach and named Zero Edge layers are retained verbatim as source edge representations. Do not label them as regular thickness contours, set them silently to zero, or infer a confidence value.
- No genetic classification of individual edge segments is encoded. Zero Edge may reflect erosion, nondeposition, facies change, or limits of interpretation; distinguish these with original well control and supporting studies.
- Line layers provide neither a complete unit-presence polygon nor a no-data mask. Blank regions must not automatically be labeled absent.
- Portal metadata dates describe the service item; they do not establish a new geological interpretation after the 2014 publication.
- The source Shape__Length values describe original projected geometries and were retained unchanged when clipping. Do not use these values as clipped line length.
- GeoJSON geometries were queried in EPSG:4326 and clipped to the stated rectangle; files marked raw retain full queried feature geometries. No smoothing, interpolation or contour renumbering was applied.

VALIDATION
{"queried_layers": 22, "all_requested_object_ids_returned": true, "raw_feature_records": 1271, "clipped_feature_records": 1266, "invalid_raw_geometries": 0, "all_clipped_geometries_valid": true}

SOURCE LICENSE
https://gisappl.saskatchewan.ca/Html5Ext/Resources/GOS_Standard_Unrestricted_Use_Data_Licence_v2.0.pdf
SOURCE CREDIT
Staff of the Saskatchewan Geological Survey. Any products derived from the use of the data provided by the Saskatchewan Mining and Petroleum GeoAtlas must be cited with the layers and date used to create said products. The ‘GeoAtlas’ contains information licensed under the Government of Saskatchewan Standard Unrestricted Use Data License (Version 2.0). For Example: Saskatchewan Mining and Petroleum GeoAtlas, 250K Bedrock Geology and Mineral Deposits Index, June 12, 2017.
