Re: [OpenMap Users] GreatCircle ellipsoidalAziDist status?

Hi Tony,

On Apr 29, 2004, at 2:41 PM, Tony Bigbee wrote:

> Don,
>
> Thanks for the pointer. Am I wrong that the distance calculated is an
> angular/'straight line' between points rather than a great circle,
> even though each Geo is instantiated as non-sphere?

I'm not sure what the difference between these would be.

> It would be nice to have some heuristics that sketch differences
> between ellipsoid and spherical earth models in terms of great circle
> or other distance calculations. I think this could help people make
> informed choices or at least be explicitly aware of the variability.

I guess they could make the calculations themselves, using the Geo
class and the GreatCircle class, to see the difference between the
ellipsoid calculations and the spherical ones.

- Don

> On Apr 29, 2004, at 1:51 PM, Don Dietrick wrote:
>
>> Hi Tony,
>>
>> The status is unchanged. You're actually the first person to make a
>> query about it in several years. You can use the
>> com.bbn.openmap.geo.Geo class for those kind of queries, though.
>>
>> - Don
>>
>> On Apr 29, 2004, at 1:25 PM, Tony Bigbee wrote:
>>
>>> Hi,
>>>
>>> The ellipsoidalAziDist method is listed as depcreated in the online
>>> and distro API doc.
>>> "this has been yanked until we have a more stable and documented
>>> algorithm."
>>>
>>> What is the status on making this method usable?
>>>
>>> Thanks,
>>> Tony Bigbee
>>>
>>>
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>
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=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
Don Dietrick, dietrick@bbn.com
BBN Technologies, Cambridge, MA
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