Re: Jeppesen database

[Brian Lloyd <brian@lloyd.com>]

At 05:53 PM 3/25/99 -0800, you wrote:
>On Thu, Mar 25, 1999 at 01:37:46PM -0800, Brian Lloyd wrote:
>> Dave Bridgham <dab@froghouse.org> (also on this list) and I purchased the
>> sample data kit from Jeppesen for their database.  This kit contains a
>> rather large book of all the record formats and sample data of all the
>> record types on floppy.  It is enough to allow you to write and test
>> software that will accept the Jeppesen data as input.  As I recall, it was
>> about $150(US) for the kit.
>> 
>
>   Very interesting. I must say I'm really quite surprised that they
>take such an "open" attitude towards reading the data. Not a slam on
>Jeppesen in any way, but it seems like every company on earth has tried
>to restrict the use of their products in every *possible* legal and
>technical way (Win Printers and Win Modems for example, to these
>companies the concept of "fair use" means "no use). Very refreshing
>really...

Well, if you consider that they are in the business of selling the data, I
would imagine that they would want a representation that is as universal as
possible.  As I recall they do not want you selling their data unmodified.
I think they want you to put it into a format unique to your application.
OTOH, that makes sense if you are picking and choosing among the data
elements for your particular application.

>   As far as conversion software goes, I wrote avdbtools (the package
>used to create the fplan databases) in plain ol' C. I know people have
>their favorites, but C worked just fine. The bulk of it came together
>in just a couple evenings.

I think C would be a good language for doing data conversions since you
have the flexibility of interpreting the data any way you want to.


Brian Lloyd                                    Lucent Technologies
brian@lloyd.com                                3461 Robin Lane, Suite 1
http://www.livingston.com                      Cameron Park, CA  95682
+1.530.676.6513 - voice                        +1.530.676.3442 - fax    O-

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