Do you have a Series 60 phone with GPS capability, such as Nokia E90 or N95, and want to use the GPS satellite information to locate your position with normal printed paper maps?
I tried to do this in the French Alps with the IGN topographic maps. What I found was the coordinates shown in the phone are in decimal format; but the French maps like IGN TOP25 have Universal Transverse Mercator UTM gridlines which are impossible to convert in your head from the decimal lat/lon format shown in the phone. (Go to Wikipedia and other web pages if you want to understand what all that means .. back to school geography lessons for you!).
So I looked for S60 software to display GPS decimal coordinates as UTM and other grid coordinate formats such as OSGB for the UK. In the end I wrote this Java [J2ME] application myself. Here it is for you to download and use. It’s simple with the main view for the current GPS location in several coordinate types:
- degrees in decimals (WGS84 datum)
- degrees-minutes-seconds (WGS84 datum)
- dd mm.mmm (WGS84 datum)
- UTM coordinates (WGS84 datum) in metres
- MGRS coordinates (WGS84 datum) option
- OSGB coordinates (1936 datum) shown when in the UK
There are also several other indicators such as position accuracy, altitude, speed relative to ground, heading in degrees relative to true North, bearing and distance to a landmark, distance to north pole and south pole and equator, civil twilight, sunrise and sunset times, time and date of the last captured position.
Before travelling check your paper map is printed with one of these gridline and datum formats (US maps with UTM grids using either NAD27 or NAD83 datums are not supported) and test the application coordinates against your map before real use! I doubt I'll be adding support for any other datums or country coordinates as these two cover the activities I need in UK and France. Other applications like Nokia GPS data and Nokia Sportstracker have lots more functionality for navigation and can run in the device at the same time as UTM data.
Two additional views provide a Compass bearing to a selected landmark from the device landmark store, and a Map view to a world map. Toggle between these views using Left/Right or "8" key. You can also load small map image files to the Map view by following the instructions here
In addition to viewing coordinates for the current GPS position, you can take coordinates read from a paper map (in grid datum formats: OSGB-1936, UTM wgs84, MGRS wgs84, Deg-Min-Sec wgs84, dd mm.mmm wgs84) and convert and save these map positions to the device's Landmark store (in degrees). Then later when trekking using applications like Nokia GPS data you can set your target destination to the saved Landmark and navigate to the position you read off the map.
Landmarks in the device Landmark store saved by other applications can be viewed in the different coordinate types supported by UTM data.
This is a beta release so may contain bugs. I have used this application with Nokia E90 and N95 with the internal GPS, and earlier versions with Nokia E61 using an external Bluetooth GPS accessory.