Related by context. Frequent words. (Click for all words.) 40 multimeter 39 plasma cutter 37 miter saw 37 loupe 36 Fresnel 35 #/#-in [001] 34 protractor 33 periscopes 32 spacings 32 chronometer 32 reflector 31 altimeter 30 trig 30 sundial 30 polynomial 30 turret 30 awl 30 meter spacing 30 1ft 30 Borehole 30 eyepieces 29 accuracies 29 ellipse 29 interferometer 29 localizer 29 sextant 29 magnetometer 28 compasses 28 magnetic compass 28 thermal emission spectrometer 28 inertial navigation 28 Lidar 28 radar altimeter 28 camera obscura 28 lunar module 28 compass 28 kinematic 28 periscope 27 rock outcrop 27 rangefinder 27 gages 27 telescopic 26 anemometer 26 flints 26 anemometers 26 transect 26 topographical map 25 laser scanning 25 termite mounds 25 directional arrows 25 surveyor 25 radiometer 25 magnifying glasses 24 tripod 24 hyperspectral 24 divining rod 24 telescopic sights 24 #ft #m [002] 23 geo referenced 23 infra red 23 thermal imager 23 #m #ft [002] 23 laser scanner 23 binocular 23 ultrasonic sensors 23 transects 22 sundials 22 measuring 22 scopes 22 datum 22 DGPS 22 azimuth 22 bipod 21 seismometer 21 sonars 21 panoramic camera 21 surveyors 21 dowsing 21 measurements 21 finders 21 binoculars 20 topographic map 20 calibrate 20 topographical maps 19 ground penetrating radar 19 precise measurements 19 infrared camera 19 GPS co ordinates 18 lidar 17 scan sonar 17 Surveyors 17 geodetic 17 topographic maps 16 Remote sensing 16 pugmarks 16 visually inspect 15 crow nest 14 GPS locators 14 surveying 9 Global Positioning System 7 triangulate