Opened 14 years ago
Closed 14 years ago
#84 closed enhancement (fixed)
New installation assist feature needs adjustment
| Reported by: | Norm Olsen | Owned by: | Norm Olsen |
|---|---|---|---|
| Priority: | major | Milestone: | 2.0 |
| Component: | Dictionaries | Version: | svn-trunk |
| Keywords: | Custom Datum | Cc: |
Description
The new installation assist feature (assists in converting end user defined custom datums to the new form of geodetic transformation) was originally intended to work only in the absence of a geodetic transformation dictionary. It turns out, the need is more general: to operate in the case of a datum of a specific type for which there is no reference in the currently active geodetic transformation dictionary.
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Corrected at revision 1944. What was coded for use in the case of a non-existent GeodticTransformation dictionary was extended to include:
1> there is no geodetic transformation dictionary, OR 2> the geodetic transformation dictionary exists but does not have more than one entry, OR 3> a normal geodetic dictionary appears to exist, but there is not a single entry listing the provided source datum as a source datum for a defined geodetic ransformation, AND 4> the source datum we have been provided has a method code of Molodensky, Bursa/Wolf, or Seven Parameter, AND 5> The target datum provided to us has the method code of "Is WGS84 Already, no transformation is necessary";
These additional conditions were required such that installation programs which are trying to convert pre_RFC 2 used defined dictionary entries to post-RFC 2 form could use the library functions to accomplish this rather tricky task (without creating tons of duplicate code).