Text Book of Topographical and Geographical SurveyingH.M. Stationery Office, 1905 - 288 من الصفحات |
طبعات أخرى - عرض جميع المقتطفات
عبارات ومصطلحات مألوفة
accuracy accurate adjustment altitude Angle Book Approx approximate astronomical axis azimuth barometer base bubble celestial sphere centre Chron chronometer circle clinometer co-ordinates collimation computed conical contours Corr correction cosec cross-wires determined Diff difference of longitude earth equal-area equator eye-piece geodetic Greenwich heavenly body height hill hour angle hypsometer inch instant instrument interpolation intersection interval LATI latitude latitude and longitude Length in feet limb Logarithm longitude mean measured meridians and parallels method micrometer miles moon moon's Nautical Almanac object object-glass observed latitude obtained occultation Ordnance Survey orthomorphic parallax picket plane plane-table Plate plotted pole Pole Star Polyconic Projection position Prime Vertical probable error projection rays readings refraction right angles right ascension scale second of Arc side sidereal signals station stone subtense surface Table taken tape telescope theodolite topographical transit traverse triangulation trigonometrical TUDE vernier vertical angles wire ΔΑ Δλ
مقاطع مشهورة
الصفحة 120 - Each planet moves in its orbit at such a speed that a line joining it to the sun sweeps over equal areas in equal times. 3. The square of the time...
الصفحة 37 - All the interior angles of any rectilineal figure, together with four right angles, are equal to twice as many right angles as the figure has sides.
الصفحة 127 - The mean solar day is divided into 24 hours, each hour into 60 minutes, and each minute into 60 seconds.
الصفحة 127 - An apparent solar day is the interval between two successive transits of the sun's centre across the meridian of any place.
الصفحة 120 - As the planet moves round the sun, its radius-vector (or the line joining it to the sun) passes over equal areas in equal times. To explain these laws, let PA (Fig. 20) be the ellipse in which the planet moves. Then the sun will not be in the cenFio.
الصفحة 127 - A SIDEREAL DAY is the interval of time between two successive upper transits of the vernal equinox over the same meridian.
الصفحة 202 - ... is equal to the probable error of a single observation divided by the square root of the number of observations. The probable error of the mean, hence, decreases as Vw increases.
الصفحة 122 - The parsec is the distance at which a star would have a parallax of one second of arc.
الصفحة 123 - The longitude of a place is the arc of the equator intercepted between the meridian of that place and some assumed meridian to which all others are referred.
الصفحة 56 - triangle of error " is inside the triangle formed by the three fixed points, the position is inside the triangle of error ; and if outside, outside.