Polyconic

Definition: OGC Well Known Text

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PROJCS["Sphere_Polyconic",
    GEOGCS["Unknown datum based upon the Authalic Sphere (deprecated)",
        DATUM["Not_specified_based_on_Authalic_Sphere",
            SPHEROID["Sphere",6371000,0,
                AUTHORITY["EPSG","7035"]],
            AUTHORITY["EPSG","6035"]],
        PRIMEM["Greenwich",0,
            AUTHORITY["EPSG","8901"]],
        UNIT["degree minute second hemisphere",0.0174532925199433,
            AUTHORITY["EPSG","9108"]],
        AUTHORITY["EPSG","4035"]],
    PROJECTION["Polyconic"],
    PARAMETER["latitude_of_origin",0],
    PARAMETER["central_meridian",0],
    PARAMETER["false_easting",0],
    PARAMETER["false_northing",0],
    UNIT["metre",1,
        AUTHORITY["EPSG","9001"]],
    AXIS["Easting",EAST],
    AXIS["Northing",NORTH],
    AUTHORITY["ESRI","53021"]]

Definition: OGC Well Known Text 2 (2019)

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PROJCRS["Sphere_Polyconic",
    BASEGEOGCRS["Unknown datum based upon the Authalic Sphere",
        DATUM["Not specified (based on Authalic Sphere)",
            ELLIPSOID["Sphere",6371000,0,
                LENGTHUNIT["metre",1]]],
        PRIMEM["Greenwich",0,
            ANGLEUNIT["degree",0.0174532925199433]],
        ID["EPSG",4035]],
    CONVERSION["Sphere_Polyconic",
        METHOD["American Polyconic",
            ID["EPSG",9818]],
        PARAMETER["Latitude of natural origin",0,
            ANGLEUNIT["degree",0.0174532925199433],
            ID["EPSG",8801]],
        PARAMETER["Longitude of natural origin",0,
            ANGLEUNIT["degree",0.0174532925199433],
            ID["EPSG",8802]],
        PARAMETER["False easting",0,
            LENGTHUNIT["metre",1],
            ID["EPSG",8806]],
        PARAMETER["False northing",0,
            LENGTHUNIT["metre",1],
            ID["EPSG",8807]]],
    CS[Cartesian,2],
        AXIS["(E)",east,
            ORDER[1],
            LENGTHUNIT["metre",1]],
        AXIS["(N)",north,
            ORDER[2],
            LENGTHUNIT["metre",1]],
    USAGE[
        SCOPE["Not known."],
        AREA["World."],
        BBOX[-90,-180,90,180]],
    ID["ESRI",53021]]

Definition: ESRI Well Known Text

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PROJCS["Sphere_Polyconic",
    GEOGCS["GCS_Sphere",
        DATUM["D_Sphere",
            SPHEROID["Sphere",6371000.0,0.0]],
        PRIMEM["Greenwich",0.0],
        UNIT["degree minute second hemisphere",0.0174532925199433]],
    PROJECTION["Polyconic"],
    PARAMETER["False_Easting",0.0],
    PARAMETER["False_Northing",0.0],
    PARAMETER["Central_Meridian",0.0],
    PARAMETER["Latitude_Of_Origin",0.0],
    UNIT["Meter",1.0]]

Definition: PROJ.4

+proj=poly +lat_0=0 +lon_0=0 +x_0=0 +y_0=0 +R=6371000 +units=m +no_defs +type=crs

Definition: JavaScript (Proj4js)

proj4.defs("ESRI:53021","+proj=poly +lat_0=0 +lon_0=0 +x_0=0 +y_0=0 +R=6371000 +units=m +no_defs +type=crs");

Definition: JSON

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{
    "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json",
    "type": "ProjectedCRS",
    "name": "Sphere_Polyconic",
    "base_crs": {
        "name": "Unknown datum based upon the Authalic Sphere",
        "datum": {
            "type": "GeodeticReferenceFrame",
            "name": "Not specified (based on Authalic Sphere)",
            "ellipsoid": {
                "name": "Sphere",
                "radius": 6371000
            }
        },
        "coordinate_system": {
            "subtype": "ellipsoidal",
            "axis": [
                {
                    "name": "Geodetic latitude",
                    "abbreviation": "Lat",
                    "direction": "north",
                    "unit": {
                        "type": "AngularUnit",
                        "name": "degree minute second hemisphere",
                        "conversion_factor": 0.0174532925199433
                    }
                },
                {
                    "name": "Geodetic longitude",
                    "abbreviation": "Long",
                    "direction": "east",
                    "unit": {
                        "type": "AngularUnit",
                        "name": "degree minute second hemisphere",
                        "conversion_factor": 0.0174532925199433
                    }
                }
            ]
        },
        "id": {
            "authority": "EPSG",
            "code": 4035
        }
    },
    "conversion": {
        "name": "Sphere_Polyconic",
        "method": {
            "name": "American Polyconic",
            "id": {
                "authority": "EPSG",
                "code": 9818
            }
        },
        "parameters": [
            {
                "name": "Latitude of natural origin",
                "value": 0,
                "unit": "degree",
                "id": {
                    "authority": "EPSG",
                    "code": 8801
                }
            },
            {
                "name": "Longitude of natural origin",
                "value": 0,
                "unit": "degree",
                "id": {
                    "authority": "EPSG",
                    "code": 8802
                }
            },
            {
                "name": "False easting",
                "value": 0,
                "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": "E",
                "direction": "east",
                "unit": "metre"
            },
            {
                "name": "Northing",
                "abbreviation": "N",
                "direction": "north",
                "unit": "metre"
            }
        ]
    },
    "scope": "Not known.",
    "area": "World.",
    "bbox": {
        "south_latitude": -90,
        "west_longitude": -180,
        "north_latitude": 90,
        "east_longitude": 180
    },
    "id": {
        "authority": "ESRI",
        "code": 53021
    }
}

Definition: GeoServer

53021=PROJCS["Sphere_Polyconic",GEOGCS["Unknown datum based upon the Authalic Sphere (deprecated)",DATUM["Not_specified_based_on_Authalic_Sphere",SPHEROID["Sphere",6371000,0,AUTHORITY["EPSG","7035"]],AUTHORITY["EPSG","6035"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree minute second hemisphere",0.0174532925199433,AUTHORITY["EPSG","9108"]],AUTHORITY["EPSG","4035"]],PROJECTION["Polyconic"],PARAMETER["latitude_of_origin",0],PARAMETER["central_meridian",0],PARAMETER["false_easting",0],PARAMETER["false_northing",0],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Easting",EAST],AXIS["Northing",NORTH],AUTHORITY["ESRI","53021"]]

Definition: MapServer - MAPfile

PROJECTION
	"proj=poly"
	"lat_0=0"
	"lon_0=0"
	"x_0=0"
	"y_0=0"
	"R=6371000"
	"units=m"
	"no_defs"
	"type=crs"
END

Definition: Mapnik

<?xml version="1.0" encoding="utf-8"?>
<Map srs="+proj=poly +lat_0=0 +lon_0=0 +x_0=0 +y_0=0 +R=6371000 +units=m +no_defs +type=crs">
	<Layer srs="+proj=poly +lat_0=0 +lon_0=0 +x_0=0 +y_0=0 +R=6371000 +units=m +no_defs +type=crs">
	</Layer>
</Map>

Definition: SQL (PostGIS)

INSERT into spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext) values ( 53021, 'ESRI', 53021, '+proj=poly +lat_0=0 +lon_0=0 +x_0=0 +y_0=0 +R=6371000 +units=m +no_defs +type=crs', 'PROJCS["Sphere_Polyconic",GEOGCS["Unknown datum based upon the Authalic Sphere (deprecated)",DATUM["Not_specified_based_on_Authalic_Sphere",SPHEROID["Sphere",6371000,0,AUTHORITY["EPSG","7035"]],AUTHORITY["EPSG","6035"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree minute second hemisphere",0.0174532925199433,AUTHORITY["EPSG","9108"]],AUTHORITY["EPSG","4035"]],PROJECTION["Polyconic"],PARAMETER["latitude_of_origin",0],PARAMETER["central_meridian",0],PARAMETER["false_easting",0],PARAMETER["false_northing",0],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Easting",EAST],AXIS["Northing",NORTH],AUTHORITY["ESRI","53021"]]');

ESRI:53021

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