Re: [Gpsbabel-code] [Gpsbabel-misc] Feature request - units

[Robert L. <rob...@gp...>]

This is so straight-forward that a single patch is fine.

It's almost certainly a case the max/mins never getting changed from their
initial ridiculous values because we had no altitudes to add to the bounding
set.

Thanx,
RJL

On Fri, Oct 15, 2010 at 6:43 PM, Steve Trabert <tst...@qw...>wrote:

>  Robert,
>
> I have a patch that does not switch m to km or ft to miles for kml
> altitudes.  I left depth alone.  However, I believe I have found an existing
> bug revealed in one of the test cases.  The minimum altitude was reported
> previously as  621371.192 mi for segmented_tracks-track.kml and
> segmented_tracks.kml.  It is now reported as 3280839896.719 ft.  But all the
> elevations tags in the input gpx file segmented_tracks.gpx are 0.000000.  So
> it appears there was and is a bug in finding the minimum altitude.  I can
> look into this.  Would your prefer one feature patch and one bug patch, or
> everything at once?
>
> Steve
>
>
> On 10/13/10 5:16 AM, Steve Trabert wrote:
>
> Robert,
>
> I agree.  General usage seems to require different conversions for
> horizontal and vertical distances.  One of the changes I was merging from my
> personal modifications was the addition of a format_altitude function.  I'll
> send in a patch for review.
>
> Steve
>
> On 10/12/10 7:29 PM, Robert Lipe wrote:
>
>
>
> On Tue, Oct 12, 2010 at 4:21 PM, Steve Trabert <tst...@qw...>wrote:
>
>>  Matt,
>>
>> I have noticed that the kml writer likes to switch units of elevation from
>> feet to miles (at 5280 ft) or m to km (at 1000m).  This comes from
>> fmt_distance() in units.c.  When I think of a mountain I think of the
>> elevation in feet or meters irrespective of the magnitude of the elevation,
>> but I cannot find any standard for this preference.  In aviation do you
>> think of altitudes in feet or meters irrespective of the magnitude?  If I
>> could find some justification for my preference I would submit a patch.
>>
>
>  Right now, the same code is used for linear distance, whether that's
> horizontal motion or altitude.  Between this and the previous request
> perhaps it makes sense to provide different functions or at least an
> additional argument that allowed changes like this and the original one in
> the thread to be implemented.
>
>  RJL
>
>
>
>
>>
>> Steve
>>
>>
>> On 10/11/10 10:13 AM, Matt Cunningham wrote:
>>
>>  Hello GPSBabel-ers
>>
>> I hope this is the correct way to ask for a feature request.  During the
>> conversion of files to the KML format, it is possible to choose the
>> units;  s=statute, m=metric, n=nautical.  Is it easy to create a fourth set,
>> e.g. a=aviation?
>>
>> I only found GPSBabel today and so far it meets all of my needs.  But the
>> unit set could be slightly better.  “Nautical” is the best option for
>> aviation, but the altitude is also given in nautical miles.  If this could
>> be changed to feet, that would be fantastic and perfect for
>> aviation-based users!  (knots for speed, nautical miles for distance,
>> feet for altitude)
>>
>> Best regards
>>
>> Matt
>>
>>
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