[OpenMap Users] Moving Blip

From: Potter, Mark A (UK Rochester) <"Potter,>
Date: Wed, 15 Dec 2004 15:01:43 +0000

Hello All,

I have recently swapped from using another set of map utilities to using OpenMap, and so I am reasonably new to it. I have been really delighted with the capabilities so far, but I have one niggling problem that I am really struggling with, the frustration being how simple it should be to do - I'm sure I'm missing something. I've also being trawling around the OM mailing list archives, and found similar problems but as yet no definitive solution for what I am trying to achieve. Any help you can provide will be greatly appreciated.

So far I have used openmap to produce a moving map - receiving lat/long information across a network and re-entering the map to suit. Brilliant, took me a day to do that. Took me a further day to learn how to zoom in and out to set ranges (i.e.. 100m, 200m, 400m and so on). Incidentally I've got a curious problem with that but I'll save that one for later...

I have made myself a little application called Map.java that pulls in the necessary objects from open map and diy-builds the layers (I do not use the .properties file)... this is because at a later date I'll need to tell it which map data to pull in depending on a current location (map data will be in different formats - bring on standardisation!)...

I have a loop running (I know its not the best solution but this is a proof-of-concept research project), that does the following:

     while(true) {
        System.out.println("Current lat = " + currentPos.getLatitude());
        System.out.println("Current lng = " + currentPos.getLongitude());



I have a global LatLonPoint currentPos, which getTelemetry() populates with the current position (recieved once a second).

centreMap() does what it says on the tin, centre-ing the map on the current position.

paintSymbol() I just want to put a circle in the middle of the screen (moreover, the current lat lon position), representing the object being tracked.

I've tried so many ways of doing this it is unreal... An "OMGraphics guide for Dummies" answer would be delightful - it is such a simple thing to do I'm going insane! I've spent 2 weeks trying to get it right!!!

Any more information required just shout. I'm using MapBean and a MapHandler to which I'm adding layers.


Mark Potter.

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Received on Wed Dec 15 2004 - 10:36:56 EST

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