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).