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1 change: 1 addition & 0 deletions hapi-dev/HAPI-data-access-spec-dev.md
Original file line number Diff line number Diff line change
Expand Up @@ -864,6 +864,7 @@ Possible component names are constrained to be one of the following:
| `colatitude` | Angle relative to +z axis, from 0 to 180°, or 0 to π |
| `longitude` | Angle relative to +x axis of a projection of the vector into the x-y plane, from -180° to 180°, or -π to π (90° corresponds to +y axis; this is also known as "East longitude") |
| `longitude0` | Angle relative to +x axis of a projection of the vector into the x-y plane, from 0° to 360°, or 0 to 2π (270° corresponds to -y axis; this is also known as "East longitude") |
| `altitude` | Altitude above a reference sphere or surface as identified in `coordinateSystemName`. For example, Earth locations are often descriped with longitude, latitude, and altitude.|
| `other` | Any parameter element that cannot be described by a name in this list |

Many angular quantities in datasets have different names than the ones here
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