Working with Vector Data - Desktop GIS: Mapping the Planet with Open Source Tools - page 29

Figure 3.1: uDig Data Sources Dialog
Moving Around
If you're following along, you should be looking at the countries of the
world. Take a look at New Zealand—it's pretty small. This is where
navigation tools come into play. Every GIS application, whether it be on
the Web or the desktop, has a way to navigate around the map. uDig,
of course, supports the usual zoom/pan/identify functions common to
all applications.
Let's get a closer look at New Zealand. Select the Adjust Current Zoom tool
from the toolbar. It's the magnifying glass with the drop-down caret
next to it. If you are unsure which tool it is, hover the mouse for a few
seconds, and you'll get a tooltip to help you out. Find New Zealand,
drag a box around it, and then release the mouse. uDig will zoom the
view to cover the region of the box. You now have a better view of New
Zealand. You can continue to zoom in as much as you like by dragging
boxes with the mouse.
So now that we've zoomed into the gnat's eyebrow, we need to determine
how to get back out. There are a couple of ways do it. First we can go
back to the full view (extent) by using the Zoom to Layers tool in the