GXTRND class

class GXTRND(handle=0)[source]

GXTRND class.

The GXTRND methods are used to determine trend directions in database data by locating maxima and minima along lines and joining them in a specified direction. The resulting trend lines are appended to the database and used by gridding methods such as Bigrid and Rangrid to enforce features in the specified direction.

__init__(handle=0)[source]

Initialize self. See help(type(self)) for accurate signature.

classmethod get_max_min(vv_x, vv_y, vv_z, vv_xm, v_vym, v_vzm, window, trnd)[source]

Find the max/min nodes in a line.

Parameters

  • vv_x (GXVV) – X Channel

  • vv_y (GXVV) – Y Channel

  • vv_z (GXVV) – Data Channel

  • vv_xm (GXVV) – X MaxMin (returned)

  • v_vym (GXVV) – Y MaxMin (returned)

  • v_vzm (GXVV) – Data MaxMin (returned)

  • window (float) – MaxMin Window

  • trnd (int) – TRND_NODE constants

New in version 5.0.

License: Geosoft End-User License

Note: Trend lines positions consist of X and Y VVs

classmethod get_mesh(db, chan, window, max_length, mesh_vv, trnd)[source]

Get the lines in a trend mesh.

Parameters

  • db (GXDB) – Database

  • chan (str) – Selected channel

  • window (float) – MaxMin Window

  • max_length (float) – Maximum join length

  • mesh_vv (GXVV) – GXVV of type GS_D2POINT (returned)

  • trnd (int) – TRND_NODE constants

New in version 5.0.

License: Geosoft End-User License

is_null()[source]

Check if this is a null (undefined) instance

Returns

True if this is a null (undefined) instance, False otherwise.

Return type

bool

classmethod null()[source]

A null (undefined) instance of GXTRND

Returns

A null GXTRND

Return type

GXTRND

classmethod trnd_db(db, chan, window, angle, deviation, max_length, deflection, min_length, resample, br_angle)[source]

Uses a selected channel to find data trends in a database.

Parameters

  • db (GXDB) – Database handle

  • chan (str) – Selected channel

  • window (float) – MaxMin Window

  • angle (float) – Preferred angle, degrees CCW from X

  • deviation (float) – Allowed deviation

  • max_length (float) – Longest join

  • deflection (float) – Maximum deflection in join (can be rDUMMY)

  • min_length (float) – Minimum length for trend lines (can be rDUMMY)

  • resample (float) – Resampling distance (can be rDUMMY)

  • br_angle (float) – Breaking angle, degrees CCW from X (can be rDUMMY)

New in version 5.0.

License: Geosoft End-User License

TRND_NODE constants

Node to find

TRND_MIN

Trnd min

gxapi.TRND_MIN = 0
TRND_MAX

Trnd max

gxapi.TRND_MAX = 1