Topographic mapping (aerial and conventional)

Some were surveying me with expressions which I afterward discovered marked extreme astonishment, and the others were evidently satisfying themselves that I had not molested their young.

1. Like its master, it was entirely devoid of hair, but was of a dark slate color and exceeding smooth and glossy.
2. Its belly was white, and its legs shaded from the slate of its shoulders and hips to a vivid yellow at the feet.
3. The feet themselves were heavily padded and nailless, which fact had also contributed to the noiselessness of their approach, and, in common with a multiplicity of legs, is a characteristic feature of the fauna of Mars.
4. The highest type of man and one other animal, the only mammal existing on Mars, alone have well-formed nails, and there are absolutely no hoofed animals in existence there.

They were conversing together in low tones, and gesticulating and pointing toward me. Their discovery that I had not harmed the little Martians, and that I was unarmed, must have caused them to look upon me with less ferocity; but, as I was to learn later, the thing which weighed most in my favor was my exhibition of hurdling.

Here comes a video