EPSG
Brodzik, M. J., & Knowles, K. (2002). EASE-Grid: a versatile set of equal-area projections and grids. http://www.ncgia.ucsb.edu/globalgrids-book/ease_grid
2006-09-22
Environmental science - used as basis for EASE grid.
See information source for equations to define Equal-Area Scalable Earth Grid (EASE-Grid) overlay.
Lambert Azimuthal Equal Area (Spherical)
Northern hemisphere - north of 60°N onshore and offshore, including Arctic.
(0,)
Definition: OGC Well Known Text 2 (2019)
CONVERSION["US NSIDC Equal Area north projection", METHOD["Lambert Azimuthal Equal Area (Spherical)", ID["EPSG",9821]], PARAMETER["Spherical latitude of origin",90, ANGLEUNIT["degree",0.0174532925199433], ID["EPSG",8828]], PARAMETER["Spherical longitude of origin",0, ANGLEUNIT["degree",0.0174532925199433], ID["EPSG",8829]], PARAMETER["False easting",0, LENGTHUNIT["metre",1], ID["EPSG",8806]], PARAMETER["False northing",0, LENGTHUNIT["metre",1], ID["EPSG",8807]], ID["EPSG",19867]]
Definition: JSON
{ "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json", "type": "Conversion", "name": "US NSIDC Equal Area north projection", "method": { "name": "Lambert Azimuthal Equal Area (Spherical)", "id": { "authority": "EPSG", "code": 9821 } }, "parameters": [ { "name": "Spherical latitude of origin", "value": 90, "unit": "degree", "id": { "authority": "EPSG", "code": 8828 } }, { "name": "Spherical longitude of origin", "value": 0, "unit": "degree", "id": { "authority": "EPSG", "code": 8829 } }, { "name": "False easting", "value": 0, "unit": "metre", "id": { "authority": "EPSG", "code": 8806 } }, { "name": "False northing", "value": 0, "unit": "metre", "id": { "authority": "EPSG", "code": 8807 } } ], "id": { "authority": "EPSG", "code": 19867 } }
Definition: Mapnik
<?xml version="1.0" encoding="utf-8"?> <Map srs="+proj=laea +R_A +lat_0=0 +lon_0=0 +x_0=0 +y_0=0"> <Layer srs="+proj=laea +R_A +lat_0=0 +lon_0=0 +x_0=0 +y_0=0"> </Layer> </Map>
Definition: SQL (PostGIS)
INSERT into spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext) values ( 19867, 'EPSG', 19867, '+proj=laea +R_A +lat_0=0 +lon_0=0 +x_0=0 +y_0=0', 'PROJECTION["Lambert_Azimuthal_Equal_Area"],PARAMETER["Spherical latitude of origin",90],PARAMETER["Spherical longitude of origin",0],PARAMETER["false_easting",0],PARAMETER["false_northing",0]');