TrekBuddy

[kruch]

[tdroza]

Can you tell me what units the rmc:speed tag uses in the gpx log file? I thought it was knots, but when I convert this to miles per hour (multiply by 15077945) it doesn't give the correct values for the speed that I was traveling (the kmh display on the OSD is correct though).

Thanks,
Tom

[guest]

Pls find problem description on following pictures, little yellow arrow shows correct wpt positon on map (checked on place and in other tools too). It is position of real geocache.

Ranger

[kruch]

[kruch]

[guest]

[kruch]

[guest]

[guest]

... and now:

... for me, the sound for the events are sometimes too quiet, can you add a volume control preset
... would like to have a waypointname_automatic name suggestion as preset option, so i have only to accept:

wp.2006.12.01.23.05 (eg %whateveryouwant%year%month%day%hour%minute)


... still wish a speedometer (bigbig numbers!, you know, please!)
... and now, can do an advanced speedometer with a ping-sound when
i go faster (as xx>kmh) or pong-sound for slower (as yy<kmh).
With an preset for one "ping" when i go over the speed ("pong when
i go under my speed") or a "ping ping ping" (intervall, like you have
done by bt reconnection).

and .mp3/.au for "ping" and "pong" would be veryvery nice

... is there a database for calibrated maps ?
... where is the guy who wants to offer a java_script for automatic google.map download ??? can you hear me/us ???


... thanx, keep on this wonderfull tb, always very happy to see the new steps

m

[kruch]

Ranger: it all may be a flaw in TB logic. Let's see:

- map viewer uses map calibration, so let's assume we have a map with S-42 Poland datum
- location info from GPS is taken, coordinates transformed from WGS-84 to S-42 POL, sent to map viewer which it just transforms to x,y pixel position, scrolls the map if necessary, updates crosshair position ect
- when a waypoint is selected for navigation, its coordinates are transformed from WGS-84 to S-42 POL, and sent to map viewer that transforms lat/lon -> x,y and displays waypoint symbol.

Info in OSD is 'bound' to map viewer therefore position shown there is in given map datum (S-42 POL in this example)

This is how I think it works and it should work ok, but, there may be a bug in code or in the "process" that I may not see...

[guest]

Map position sample shows rather calculation problem in map viewer.

What are yours parameters values for S42-PL ?

I use:

Pulkovo 1942 POL (S-42 Poland)
Ellipsoid Krassovsky 1940 (OziE nr 15)

DX + 23.74 m
DY - 123.83 m
DZ - 81.81 m

DA - 108.0 m
DF +0.004 807 95

Ranger

Edit

Kruch, I'm sure that something doesn't work in map viewer as should.
If I set crosshair to any x,y position for Pulkovo datum and next change datum to WGS, crosshair is staying in the same position and coordinates are the same in OSD. But to be effective - OSD should show different WGS coordinates or map should be moved to new place.
You can say, that it is not necessary until map with new datum is really loaded. But in such case it doesn't make sense to change map datum manually or always remember last map datums used. Probably setting map datum from map calibration file can resolve such problems.

[kruch]

1)

My S-42 Poland is:

Ellipsoid("Krassovsky 1940", 6378245, 298.3);
Datum("Pulkovo 1942 (Poland)", ELLIPSOID_KRASSOVSKY_1940, 23, -124, -82);

2)

Map Datum setting is only used for transformation of "incoming" WGS-84 coordinates (ie. positions from GPS device and waypoints) to current map datum coordinates. If you are moving on the map with cursor key, you will always see the same coordinates, regardless of Map Datum setting value.

[kruch]

Hi guest m,

thanks for suggestions, but for now, let me get back to your previous notes

* a new gpx empty file is created whenever BT reconnects - I could not reproduce it, for me, an empty <trkseg/> is created in existing gpx file
* green-all-ok bullet is not shown upon successful BT reconnection - I could not reproduce this either

Perhaps I'm not doing exactly what yoyu do? Thanks.

[guest]

Ad.1

OK. I prepare custom datums file with yours parameters and we will see.
If you could use dx,dy,dz values I posted, it will be fine, it is some kind of "standard" for Polish GPS users and we have a lot of already calibrated maps.

Ad.2
As I understand, crosshair and map itself isn't treated as coordinates input, or can be such input for WGS84 map only.
Pls remember, that this way non-gps phone users can use only this kind of maps to input and send coordinates (cannot be to much more like GPS-es)

For me map datum, included in calibration file, is some kind of "metrics" of map itself, necessary to correctly interpret map objects positions, rather connected to it, not only to transformations.

Ranger

Edit

Ad1. No wpt difference in OziE with yours parameters.

[mac-es]