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Reprojects feature coordinates from one coordinate system to another.


Dynamic Coordinate Systems

If the destination coordinate system is specified as "_AZMEA_" or "_AZMED_", each input feature is reprojected to either an equal area or equal distance projection appropriate for that feature, respectively.  In general, this causes a new coordinate system to be defined for each input feature.

Each feature remembers which specific equal distance or equal area coordinate system it has, and can be safely reprojected back to a normal (non-dynamic) coordinate system.

As an example:

  1. There is an input feature representing a point on the earth in LL-WGS84 (normal lat/long).
  2. The point is reprojected to _AZMED_ via a Reprojector with source LL-WGS84 and destination _AZMED_.
  3. The x and y coordinates of the point are extracted into x1, y1.
  4. Set x2 = x1 + 1000, and y2 = y1.
  5. Add a vertex to the point to make the line (x1,y1) -> (x2,y2).
  6. Reproject back to LL-WGS84 via a Reprojector with source _AZMED_ and destination LL-WGS84.  

Note: Note that the source is ignored here.  We just chose _AZMED_ to help remember what is going on.  Sometimes people prefer to set the source and destination both to LL-WGS84.

  1. Now we have changed our point into a line extending 1 km east of the original point, in lat/long.

Dynamic coordinate systems have the following limitation:

• Z is not considered, so areas or distances are best preserved for geometry at an ellipsoid height of 0 meters.


Usage Notes

  • This transformer works with both raster and vector data.
  • This transformer is unaffected by raster band and palette selection.

Editing Transformer Parameters

Using a set of menu options, transformer parameters can be assigned by referencing other elements in the workspace. More advanced functions, such as an advanced editor and an arithmetic editor, are also available in some transformers. To access a menu of these options, click beside the applicable parameter. For more information, see Transformer Parameter Menu Options.

Transformer Categories

Coordinate Systems

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Tags Keywords: pointcloud