The gridded difference file AB_CSRS.DAC in STEP 1 will need to be renamed to AB_CSRS.gsb to run in some software suites. Formats identical, but AB file is provincial fit only.
Geodetic Control Section; Land and Forest Svc; Alberta Environment; http://www.gov.ab.ca/env/land/dos/ or email to geoff.banham@gov.ab.ca
2000-10-19
Engineering survey, topographic mapping.
State law defines system in US survey feet. See code 2255 for equivalent non-metric definition. For applications with an accuracy of better than 1m, replaced by NAD83(HARN) / SPCS.
Cartesian 2D CS. Axes: easting, northing (X,Y). Orientations: east, north. UoM: m.
-880147.84 3060308.68
-1453417.6 2352618.43
-385180.56 3764019.53
-120.0 48.99
-109.98 60.0
Definition: OGC Well Known Text
PROJCS["NAD83 / Mississippi West", GEOGCS["NAD83", DATUM["North_American_Datum_1983", SPHEROID["GRS 1980",6378137,298.257222101, AUTHORITY["EPSG","7019"]], AUTHORITY["EPSG","6269"]], PRIMEM["Greenwich",0, AUTHORITY["EPSG","8901"]], UNIT["degree",0.0174532925199433, AUTHORITY["EPSG","9122"]], AUTHORITY["EPSG","4269"]], PROJECTION["Transverse_Mercator"], PARAMETER["latitude_of_origin",29.5], PARAMETER["central_meridian",-90.3333333333333], PARAMETER["scale_factor",0.99995], PARAMETER["false_easting",700000], PARAMETER["false_northing",0], UNIT["metre",1, AUTHORITY["EPSG","9001"]], AXIS["Easting",EAST], AXIS["Northing",NORTH], AUTHORITY["EPSG","26995"]]
Definition: OGC Well Known Text 2 (2019)
PROJCRS["NAD83 / Mississippi West", BASEGEOGCRS["NAD83", DATUM["North American Datum 1983", ELLIPSOID["GRS 1980",6378137,298.257222101, LENGTHUNIT["metre",1]]], PRIMEM["Greenwich",0, ANGLEUNIT["degree",0.0174532925199433]], ID["EPSG",4269]], CONVERSION["SPCS83 Mississippi West zone (meter)", METHOD["Transverse Mercator", ID["EPSG",9807]], PARAMETER["Latitude of natural origin",29.5, ANGLEUNIT["degree",0.0174532925199433], ID["EPSG",8801]], PARAMETER["Longitude of natural origin",-90.3333333333333, ANGLEUNIT["degree",0.0174532925199433], ID["EPSG",8802]], PARAMETER["Scale factor at natural origin",0.99995, SCALEUNIT["unity",1], ID["EPSG",8805]], PARAMETER["False easting",700000, LENGTHUNIT["metre",1], ID["EPSG",8806]], PARAMETER["False northing",0, LENGTHUNIT["metre",1], ID["EPSG",8807]]], CS[Cartesian,2], AXIS["easting (X)",east, ORDER[1], LENGTHUNIT["metre",1]], AXIS["northing (Y)",north, ORDER[2], LENGTHUNIT["metre",1]], USAGE[ SCOPE["Engineering survey, topographic mapping."], AREA["United States (USA) - Mississippi - counties of Adams; Amite; Bolivar; Carroll; Claiborne; Coahoma; Copiah; De Soto; Franklin; Grenada; Hinds; Holmes; Humphreys; Issaquena; Jefferson; Jefferson Davis; Lawrence; Leflore; Lincoln; Madison; Marion; Montgomery; Panola; Pike; Quitman; Rankin; Sharkey; Simpson; Sunflower; Tallahatchie; Tate; Tunica; Walthall; Warren; Washington; Wilkinson; Yalobusha; Yazoo."], BBOX[31,-91.65,35.01,-89.37]], ID["EPSG",26995]]
Definition: ESRI Well Known Text
PROJCS["NAD_1983_StatePlane_Mississippi_West_FIPS_2302", GEOGCS["GCS_North_American_1983", DATUM["D_North_American_1983", SPHEROID["GRS_1980",6378137.0,298.257222101]], PRIMEM["Greenwich",0.0], UNIT["Degree",0.0174532925199433]], PROJECTION["Transverse_Mercator"], PARAMETER["False_Easting",700000.0], PARAMETER["False_Northing",0.0], PARAMETER["Central_Meridian",-90.3333333333333], PARAMETER["Scale_Factor",0.99995], PARAMETER["Latitude_Of_Origin",29.5], UNIT["Meter",1.0]]
Definition: JSON
{ "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json", "type": "ProjectedCRS", "name": "NAD83 / Mississippi West", "base_crs": { "name": "NAD83", "datum": { "type": "GeodeticReferenceFrame", "name": "North American Datum 1983", "ellipsoid": { "name": "GRS 1980", "semi_major_axis": 6378137, "inverse_flattening": 298.257222101 } }, "coordinate_system": { "subtype": "ellipsoidal", "axis": [ { "name": "Geodetic latitude", "abbreviation": "Lat", "direction": "north", "unit": "degree" }, { "name": "Geodetic longitude", "abbreviation": "Lon", "direction": "east", "unit": "degree" } ] }, "id": { "authority": "EPSG", "code": 4269 } }, "conversion": { "name": "SPCS83 Mississippi West zone (meter)", "method": { "name": "Transverse Mercator", "id": { "authority": "EPSG", "code": 9807 } }, "parameters": [ { "name": "Latitude of natural origin", "value": 29.5, "unit": "degree", "id": { "authority": "EPSG", "code": 8801 } }, { "name": "Longitude of natural origin", "value": -90.3333333333333, "unit": "degree", "id": { "authority": "EPSG", "code": 8802 } }, { "name": "Scale factor at natural origin", "value": 0.99995, "unit": "unity", "id": { "authority": "EPSG", "code": 8805 } }, { "name": "False easting", "value": 700000, "unit": "metre", "id": { "authority": "EPSG", "code": 8806 } }, { "name": "False northing", "value": 0, "unit": "metre", "id": { "authority": "EPSG", "code": 8807 } } ] }, "coordinate_system": { "subtype": "Cartesian", "axis": [ { "name": "Easting", "abbreviation": "X", "direction": "east", "unit": "metre" }, { "name": "Northing", "abbreviation": "Y", "direction": "north", "unit": "metre" } ] }, "scope": "Engineering survey, topographic mapping.", "area": "United States (USA) - Mississippi - counties of Adams; Amite; Bolivar; Carroll; Claiborne; Coahoma; Copiah; De Soto; Franklin; Grenada; Hinds; Holmes; Humphreys; Issaquena; Jefferson; Jefferson Davis; Lawrence; Leflore; Lincoln; Madison; Marion; Montgomery; Panola; Pike; Quitman; Rankin; Sharkey; Simpson; Sunflower; Tallahatchie; Tate; Tunica; Walthall; Warren; Washington; Wilkinson; Yalobusha; Yazoo.", "bbox": { "south_latitude": 31, "west_longitude": -91.65, "north_latitude": 35.01, "east_longitude": -89.37 }, "id": { "authority": "EPSG", "code": 26995 } }
Definition: GeoServer
26995=PROJCS["NAD83 / Mississippi West",GEOGCS["NAD83",DATUM["North_American_Datum_1983",SPHEROID["GRS 1980",6378137,298.257222101,AUTHORITY["EPSG","7019"]],AUTHORITY["EPSG","6269"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4269"]],PROJECTION["Transverse_Mercator"],PARAMETER["latitude_of_origin",29.5],PARAMETER["central_meridian",-90.3333333333333],PARAMETER["scale_factor",0.99995],PARAMETER["false_easting",700000],PARAMETER["false_northing",0],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Easting",EAST],AXIS["Northing",NORTH],AUTHORITY["EPSG","26995"]]
Definition: Mapnik
<?xml version="1.0" encoding="utf-8"?> <Map srs="+proj=tmerc +lat_0=29.5 +lon_0=-90.3333333333333 +k=0.99995 +x_0=700000 +y_0=0 +datum=NAD83 +units=m +no_defs +type=crs"> <Layer srs="+proj=tmerc +lat_0=29.5 +lon_0=-90.3333333333333 +k=0.99995 +x_0=700000 +y_0=0 +datum=NAD83 +units=m +no_defs +type=crs"> </Layer> </Map>
Definition: SQL (PostGIS)
INSERT into spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext) values ( 26995, 'EPSG', 26995, '+proj=tmerc +lat_0=29.5 +lon_0=-90.3333333333333 +k=0.99995 +x_0=700000 +y_0=0 +datum=NAD83 +units=m +no_defs +type=crs', 'PROJCS["NAD83 / Mississippi West",GEOGCS["NAD83",DATUM["North_American_Datum_1983",SPHEROID["GRS 1980",6378137,298.257222101,AUTHORITY["EPSG","7019"]],AUTHORITY["EPSG","6269"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4269"]],PROJECTION["Transverse_Mercator"],PARAMETER["latitude_of_origin",29.5],PARAMETER["central_meridian",-90.3333333333333],PARAMETER["scale_factor",0.99995],PARAMETER["false_easting",700000],PARAMETER["false_northing",0],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Easting",EAST],AXIS["Northing",NORTH],AUTHORITY["EPSG","26995"]]');