Amazing. Would be nice to have a detailed view of the scanner setup she is using.

Unrelated: what's with Google Maps loading in the background?

The bottom of the page slides in with some details including this image showing her doing the scanning - http://leannewijnsma.nl/refresh/7/about.jpg.

That's for the about-bar, on the bottom. You can click on it. There's Google Maps there to illustrate where the garden is located.

It would be nice to see a WMS (google style webmap service) of this. She should try Geoserver. Before they will appear in the right places, she will need to geostamp them. GDAL is a great way to do this.

I'm really hoping Leanne doesn't have a pond.

I think she needs some sort of enclosure (with skirts?) that gives a minimal footprint and doesn't squash the grass flat.

The point of focus for a flatbed scanner is the scanning bed itself. As objects move away from this plane, they don't scan nearly as well.

I think I paid $400 for my first 600dpi scanner, which was awesome for a flatbed back in the day. I scanned all sorts of things with it. Especially PCBs. If the object I was scanning wasn't perfectly flat on the glass, the results were terrible.