Map wheel. This device is used to measure out distances on a map. The route is traced using the wheel,which moves the pointer (top centre). The distance traced is read out from the dial. This is then converted into the real distance by using the scale provided with the map | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Horrell, Steve |
Bildgröße: | 3669 px × 4775 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |