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测量地形使用的测斜仪,依照测量学的构造理论,用上觇孔可俯测35％倾斜度,用下觇孔可仰测40％倾斜度;当觇孔板伸板时,用上孔可俯测70％倾斜度,或用分划板下端之孔,可仰测75％倾斜度。但实地测量时,往往因为测斜仪受到傍倚测点植针移转位置的限制,常使两个下孔不能仰视,由上孔俯测时,也常被测板本身挡着,不能通视。有时测量者将测斜仪移开应傍倚的侧针至图板边缘观测,这样既费时,而且质量又低。测斜仪的座尺太短,不够应用。如实地测量230公尺的距离,千分之一的比例尺缩到图上为23公分,五百分之一比例尺缩到图上为46公分。如拿测斜仪的直尺作二次绘定方向线,既费时,又难免因两次接线而易生误差。有时为便于观测,移测斜仪到图边观测,总是脱离所植立的小针,这也说明了尺短不够绕针旋转的长度。侧斜仪配合特制的觇标视距尺测量距离和高度时,
Inclinometer used to measure the terrain, according to the measurement of the tectonic theory, with the top hole can be overlooked 35% inclination, with the next hole can be upside down 40% tilt; Measure the inclination of 70%, or use the reticle at the bottom of the hole, can be up to 75% tilt. However, the field measurement, often because of inclinometer by Pianjian point needle transfer position restrictions, often make two under the hole can not look up from the hole overlooking the survey, it is often blocked by the test board itself, can not pass Visual. Occasionally, the surveyor moves the inclinometer away from the side-by-side needle to the edge of the board, which is both time-consuming and of low quality. Inclinometer foot is too short, not enough applications. True measure of the distance of 230 meters, the scale of one thousandth reduced to 23 cm on the map, the scale of one hundredth reduced to 46 cm on the map. Take the inclinometer ruler for the second set of direction lines, both time-consuming, but also inevitably due to two wiring error prone. Sometimes for the convenience of observation, the inclinometer is moved to the edge of the figure to observe and always leave the small needle. This also shows that the length of the needle is not enough to rotate around the needle. Inclination instrument with a special 觇 standard sight distance measurement distance and height,