ll2xy vs latlon2statgrid and xy2ll vs statgrid2latlon
Tools to convert between latitude, longitude and gridpoints/distance for a given simulation domain.
Common Properties
- Accept 2 (x, y) or 3 (x, y, station) values. The 3rd value is copied to output.
| ll2xy and xy2ll | latlon2statgrid and statgrid2latlon | Notes |
|---|---|---|
| can work on standard input or files | must work on files only | ll2xy more flexible, can use pipes instead of files |
| xy I/O is in km from centre | statgrid I/O is point position from top left corner | can convert between output styles given: horizontal spacing and total domain size |
| given model grid point ll coordinates, resulting x, y values are equidistant | incremental statgrid points converted to lat lon plotted: are not equidistant and are systematically shifted some points are out of place compared with neighbours | this is why ll2xy and xy2ll has a wrapper function to make sure converted points are equidistant given horizontal spacing or grid point increments. |