Mapping Hacks

Java-Based Desktop Mapping with Openmap #66

Chapter 6, Mapping on Your Desktop

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HACK

compass in the top left corner of the window. Click on the magnifying glass

with the

+ in the middle to zoom in, and the one with the - to zoom out.

Click on the arrows to move laterally in a given direction. You can also

zoom to “bookmarked” places on the map that appear in the Layer menu.

Right now, there is only one item, “World.” We’re going to add a new one

so that our map opens to the United States.

Quit the program and open a copy of openmap.properties in your home direc-

tory using your favorite text editor. Search for

gotoMenu.views=. There should

be a number of commented-out lines that define three bookmarks for Argen-

tina, India, and the United States. Uncomment these now. This will reveal

the bookmarks in Openmap, so save your work, start the program again, and

use these new menu items to quickly zoom in on the United States.

The next feature we’ll reveal is the wealth of data that comes with the pro-

gram. From the Layers menu, select “World Cities.” The map should now

look like it has the measles, covered with little red dots. We can do better

than this, though. Choose “Edit Layers…” from the Layers menu. In the dia-

log box that appears, scroll down to find “World Cities” and click on the

legend icon, which sits between the light bulb and the layer name. In the

new dialog box, check “Show Location ...