snapconv converts SNAP coordinate files from one coordinate system to another. The syntax for snapconv is:
snapconv [options] input_file new_code output_file
where
|
input_file |
is the name of the coordinate file to be converted |
|
new_code |
is the code for the coordinate system of the output file. This is one of the codes defined in the coordinate system definition file. This can include the code for a vertical datum defining the geoid height and deflections of the vertical (for example NZGD2000/NZVD2016). Note that if the coordinate file includes explicit geoid information then the coordinate system vertical datum has no effect. |
|
output_file |
is the name of the output file to be created |
and options can be:
|
-y YYYY-MM-DD |
Specify a coordinate conversion epoch for transformations that require it (eg NZGD2000 to ITRF2008) |
|
-d |
output latitude and longitude as decimal degrees |
|
-h |
output latitude and longitude as degrees, minutes, and seconds |
|
-e |
set the height coordinate type to ellipsoidal |
|
-o |
set the height coordinate type to orthometric |
|
-p |
keeps the orthometric height unchanged when the geoid height is changed. The default is to keep the 3 dimensional ellipsoidal location unchanged except when the coordinate file does not include geoid information (either from the coordinate system or explicitly) and the coordinate type is orthometric. |
|
-q |
quiet mode - even less output |
snapconv will convert the coordinates and also the geoid information in the file (deflections and geoid height). The geoid information may also be changed by including or removing a height reference surface in the new coordinate system. Note that the snapgeoid program can be used for managing height information in the coordinate file.