Zooming with d3 (SVG)

[enjalot]

Investigate:
SVG Transform based zooming
Dynamic projection based zooming
Constrained Zoom
Zoom to bounding box

Each of the above examples incorporates at least one tricky concept, whether its SVG particulars (transforms) or some funky math to calculate scales. The key here is to know how to find the technique you want when you need it, so lets play with each one briefly.

More zooming examples including transitioning and interpolating zooms.

Resources:
d3.behavior.zoom reference
simpler drag + zoom example in a non-geo context