Creating Data - Desktop GIS: Mapping the Planet with Open Source Tools - page 124

Figure 8.6: Uploading to the GPS

provide a way to create a new one. Once you're done, you can hit the
trails confident that you won't get lost (depending on how good your
digitizing was). Naturally, the better way is to download the data from
the local parks department and put it on your GPS, but sometimes that
information isn't available, especially in a GPS format.

If we have some data we want to upload, we can just open the plugin
and click the Upload to GPS tab. From the Data Layer drop-down list,
you can select the GPX layer you want to upload. Notice that it has to
be a layer that's already on the map. You can't upload an arbitrary file
using the plugin. Once you select the device and port, just click the OK
button and watch the data fly onto your GPS. In Figure 8.6 , you can
see the plugin ready to upload a routes layer to our GPS unit.

As you can see, the GPS plugin relies on gpsbabel to do the heavy lifting.

8.5 Georeferencing an Image

In case you haven't picked up on it by now, a georeferenced image is
one that has associated coordinate information such that it “draws”