LocalFrame
Coordinates transform representing a local Earth frame.
The LocalFrame constructor creates a UnitaryTransformation representing a local Earth frame at a given location (origin). By default the x-axis points to the geographic east, the y-axis to the geographic north and the z-axis corresponds to the local vertical. Optionally declination and inclination angles can be specified, e.g. in order to orient the local frame along the geo-magnetic north instead.
Synopsis
pumas.LocalFrame(origin, {(declination)=, (inclination)=})
Arguments
| Name | Type | Description |
|---|---|---|
| origin | Coordinates | Location (origin) of the local Earth frame. |
| declination | number |
Declination angle, in deg, positively measured toward the east. |
| inclination | number |
Inclination angle, in deg, positively measured downwards. |
Note
The declination angle corresponds to a rotation around the local vertical (z-axis). It is positive for a rotation towards the east. The inclination angle corresponds to a second intrinsic rotation around the x'-axis of the rotated frame. It is positive for a downward rotation.
Returns
| Type | Description |
|---|---|
| UnitaryTransformation | UnitaryTransformation representing the local Earth frame. |
Examples
local origin = pumas.GeodeticPoint(latitude, longitude, altitude)
local frame = pumas.LocalFrame(origin)