Editing Bochum (section)

===Geographical position===
The city lies on the low rolling hills of Bochum land ridge (Bochumer Landrücken), part of the Ruhrhöhen (highest elevations) between the [[Ruhr]] and [[Emscher]] rivers at the border of the southern and northern Ruhr coal region. The highest point of the city is at Kemnader Straße (Kemnader Street) in [[Stiepel]] at {{convert|196|m}} above sea level; the lowest point is {{convert|43|m}} at the Blumenkamp in [[Hordel]].

The terrain of Bochum is characterised by rolling hills that rarely have more than three per cent graduation. Steeper graduation can be found at the Harpener Hellweg near the Berghofer Holz nature reserve (3.4%), at Westenfelder Straße in the [[borough]] of [[Wattenscheid]] (3.47%), or at Kemnader Straße, which begins at the banks of the Ruhr in [[Stiepel]] ({{convert|71|m|abbr=on|disp=comma}}), and rises to its highest point in the centre of Stiepel ({{convert|196|m|abbr=on|disp=comma}}, a 5.1% increase).

The city extends north to south {{convert|13.0|km|abbr=on}} and {{convert|17.1|km|abbr=on}} east to west. The perimeter of the city limits is {{convert|67.2|km|abbr=on}}.

It is surrounded by the cities of (in clockwise direction) [[Herne, Germany|Herne]], [[Castrop-Rauxel]], [[Dortmund]], [[Witten]], [[Hattingen]], [[Essen]] and [[Gelsenkirchen]].