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Diffstat (limited to 'nad/val_def.demo')
| -rw-r--r-- | nad/val_def.demo | 83 |
1 files changed, 83 insertions, 0 deletions
diff --git a/nad/val_def.demo b/nad/val_def.demo new file mode 100644 index 00000000..87777b9d --- /dev/null +++ b/nad/val_def.demo @@ -0,0 +1,83 @@ + +----------------------------------------------------------------------- + + INTEGRATING DEFINITION AND VALIDATION OF GEODETIC SYSTEMS + +----------------------------------------------------------------------- + Thomas Knudsen, thokn@sdfe.dk, 2017-12-06 +----------------------------------------------------------------------- + +This demo shows how to use the free format definition strings, +introduced in PROJ version 5.0.0, to integrate system definition +information with system validation data. + +The system definition parts are used when doing actual transformations, +e.g. using the cct 4D transformation program: + + echo 9 55 0 0 | cct +init=val_def.demo:DKTM1 + +The system validation parts are used when validating the systems +defined in the file. This is done using the gie test program: + + gie val_def.demo + +Which will respond with a report detailing how many tests succeeded, +resp. failed. + +The syntax of proj init files is orthogonal to the syntax of gie +integrity evaluation files. This makes it possible to interleave +init and gie blocks in the same file. + +#----------------------------------------------------------------------- + + + +#----------------------------------------------------------------------- +# Danish Transverse Mercator, zone 1 +#----------------------------------------------------------------------- +<DKTM1> proj = etmerc + lat_0 = 0 lon_0 = 9 + x_0 = 200000 y_0 = -5000000 + + k = 0.99998 + + ellps = GRS80 + units = m + + no_defs +#----------------------------------------------------------------------- +<gie> +operation init = val_def.demo:DKTM1 +tolerance 100 um +accept 9 55 +expect 200000.0000 1097108.3684 +roundtrip 1000 1 nm +</gie> +#----------------------------------------------------------------------- + + + +#----------------------------------------------------------------------- +# Danish Transverse Mercator, zone 2 +#----------------------------------------------------------------------- +<DKTM2> proj = etmerc + lat_0 = 0 lon_0 = 10 + x_0 = 400000 y_0 = -5000000 + + k = 0.99998 + + ellps = GRS80 + units = m + + no_defs +#----------------------------------------------------------------------- +<gie> +operation init = val_def.demo:DKTM2 +tolerance 100 um +accept 10 55 +expect 400000.0000 1097108.3684 +accept 10.5 55.5 +expect 431597.1668 1152884.9398 +roundtrip 1000 100 um +</gie> +#----------------------------------------------------------------------- |