I am going to make E680i/A780 become GPS receiver

[chiennk]

I am now exploring how GPS system works, how they draw a map on GPS device.

I hope one day I will able to make E680i/A780 become GPS receiver.

[sylvain]

keep the good work

[sialkoti100]

good going i admire all ur work chinekk u rock!

[admin]

Good. inijohan please get more info from him, and get the bounties done. Thanks.

[chiennk]

Here is how GPS system works:

The latitude and longitude of point of interest/street/polygon are stored in a GPS map file.

GPS owner then uses an application (send map) to send GPS map file to GPS device.

In order to make E680i become a GPS receiver such as Garmin device, I have to:

1. Study GPS map file format and understand how latitude and longitude of point of interest/street/polygon are stored.

2. Come out with algorithm to convert latitude and longitude to XYZ

3. Build a program to draw a map on E680i based on the infomation in GPS map file.

After the above steps are done, then we just copy any GPS map file to E680i and use it like a garmin device.

There are a lot of works need to be done, and I am just in initial stage.

[andh1ka]

it's just GREAT.....

everything already mentioned is still in software things... what about the hardware ? does e680i capable of send and receive gps signal ?

[chavonbravo]

Yes, e680i can connect to bluetooth gps receiver usng bluez. I've posted a bit on the little progress I got with it.

[tallemd]

i'll put $100 on the it but only if it has e680i bluetooth gps functionality.

[yaworski]

Garmin map format is well known and there are many projects aimed at creating free and open source maps (for example polish UMP project). I think that more work will be with drawing objects from file than parsing this file (but I may be wrong ).

[chiennk]

Here is the list of file formats that my program can understand:

ALAN (map, waypoints, tracks)
Holux (map, waypoints, tracks)
RUSSA map
GPS Exchange format
PCX5 (waypoints, routes, tracks)
Magellan (waypoints, tracks)
OziExplorer (waypoints, routes, tracks)
Garmin MapSource map


We can convert to one map format file to another format by using G7toWin program