Coordinate System Projection Tool

The Projection Tool projects data from one coordinate system to another:

§  Generate a WKT string that defines a coordinate system (optionally, with vertical datum) for inclusion in Excel/XML photo list files, control point files, and trajectory files.

§  Convert coordinate, OPK, and YPR values from one coordinate system to another.

§  Convert the rotation format from a rotation matrix to OPK/YPR. The rotation matrix transforms coordinates in the specified coordinate system into camera coordinates using: a 3x3 matrix with <Mij> tags, where Mij denotes the coefficient of the (i+1) row and the (j+1) column of the rotation matrix.

§  Convert the rotation format from OPK/YPR to a rotation matrix

To generate a WKT string for a coordinate system:

1.     On the Tools tab, in the Coordinate System group, click Reprojection. The Projection Tool dialog is displayed.

2.     Click Open List, and select a coordinate system.

3.     Click Set and select a vertical datum from a list of supported datums.

4.     Click OK. The generated WKT string can be copied into your files as required.

To convert from one coordinate system to another:

1.     On the Tools tab, in the Coordinate System group, click Reprojection. The Projection Tool dialog is displayed.

2.     On the left side, do the following:

a.     Click Open List, and select a coordinate system.

b.     Click Set and select a vertical datum from a list of supported datums.

c.     Click OK.

d.     Enter the XYZ values, and optionally, the OPK or YPR values.

3.     On the right side, do the following:

a.     Click Open List, and select the coordinate system you want to project to.

b.     Click Set and select a vertical datum from a list of supported datums.

c.     Click OK.

4.     Click Project . The XYZ, OPK, and YPR fields on the right side are populated with the projected values.

To convert a rotation matrix to OPK and YPR:

1.     On the Tools tab, in the Coordinate System group, click Reprojection. The Projection Tool dialog is displayed.

2.     On either of the sides, do the following:

a.     Click Open List, and select a coordinate system.

b.     Click Set and select a vertical datum from a list of supported datums.

c.     Click OK.

d.     Enter the XYZ and OPK or YPR values.

3.     Click Convert :

To convert OPK and YPR to a rotation matrix:

1.     On the Tools tab, in the Coordinate System group, click Reprojection. The Projection Tool dialog is displayed.

2.     Enter a rotation matrix.

3.     Click Convert :