Manage Transformation Schemes

(This functionality is available with the Transformations module)
(Not available in LISCAD Lite)

Shows list of available system and user defined transformation schemes filtered by the selected from and to projections.

User defined transformation schemes can be created, viewed, edited or deleted.

System transformation schemes can not be edited, only viewed.

Manage Transformation Schemes is accessed from the Projections / Manage Transformation Schemes menu in the Transformations task.

Manage Transformation Schemes dialog box

Item Used to
Transformation type: Select the Transformation Type that you wish to manage. The options available are Datum, Projection & Other.
"Datum" type can only be used in Survey Live and is for transforming Cartesian or geographic coordinates between different datums. For example, to transform Latitude, Longitude and Ellipsoidal height  from WGS 84 to GDA94. Datum transformations can only be used in Survey Live (and only when working with a projection), to transform GPS observations to the project datum. They are used in the creation of "Other" "one step" or "two step" transformations. Refer to Survey Live/Setup New Transformation.
"Projection" type is for transforming projected grid coordinates between existing known projections. For example to transform Easting and Northing from AMG to MGA coordinates. Projection transformations are used in the Transformations module (Projections/Transform Projection command)
"Other" type is for transforming Cartesian or geographic coordinates to grid coordinates.  For example, to transform WGS 84 Latitude, Longitude and Ellipsoidal height  to local grid coordinates and height. "Other" transformations are "one step" or "two step" transformations created and used in Survey Live to transform GPS observations to the project coordinates. Refer to Survey Live/Setup Transformation.
From Projection: Select the projection from the drop down list that you want to transform from. If the projection you require does not appear in the list then you may need to install the projection from the system projections or you may need to create a new projection.
To Projection: Select the projection from the drop down list that you want to transform the From Projection into. If the projection you require does not appear in the list then you may need to install the projection from the system projections or you may need to create a new projection.
New...Creates a new user defined transformation scheme and adds it to the list of transformations.
View... Displays the parameters of the currently selected system or user defined transformation scheme.
First use the mouse to select a transformation scheme to be viewed from the list of transformation schemes.
Edit...Edits the currently selected user defined transformation scheme.
First use the mouse to select a transformation scheme to be edited from the list of transformation schemes.
Delete: Deletes the currently selected user defined transformation scheme.
First use the mouse to select a transformation scheme to be edited from the list of transformation schemes.
Close: Closes the dialog box.

Notes:

  • The "From Projection" & "To Projection" fields are only visible & applicable when a "Projection" Transformation Type is selected.
  • If "Other" Transformation Type is selected, 1 step and 2 step transformations that have been created using the LISCAD Survey Live module will be displayed. Only Viewing or Deleting of these transformations is possible.