Minigeo

Minigeo is a lightweight Java library that allows one to plot geographical data (namely lines between points determined by geographic coordinates — a latitude-longitude pair), using Universal Transverse Mercator (UTM) projections.

The display is done using a Swing JFrame. The user may pan and zoom with the mouse à la Google Maps (i.e. drag to pan, scroll to zoom).

It is especially useful for educators, as students can very easily use this library during practical sessions.

The screenshot shows a Minigeo window displaying OpenStreetMap data as wireframe.

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Mini tutorial

Using Minigeo is really straightforward:

1) Create a map window:

MapWindow window = new MapWindow();

2) Add segments to the window:

window.addSegment(
    new Segment(
        new Point(48, 2),
        new Point(45, -1),
        Color.RED));
...

3) Make the window visible:

window.setVisible(true);

That's it.

Have a look at MinigeoDemo.java: it loads coordinates from a text file (france.poly) and draws a polygon (France's borders and coast lines) using Minigeo.