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20 0 2年 6月 18日 ,在美国新罕布什尔州召开的由国际测量师联合会 (FIG)、国际海道测量组织 (IHO)及国际制图协会 (ICA)组成的联合咨询委员会第 15届会议上 ,海军大连舰艇学院海道测量专业正式通过A级国际海道测量师培训资格认证。成为世界上为数不多的国际海道测量师A级国际授权培训单位之一。这标志着我国海道测量专业具备了培训A级国际海道测量师的资格 ,率先步入了国际标准化教育行列。国际海道测量教育始于 2 0世纪 70年代后期 ,由国际测量师联合会 (FIG)和国际海道测量组织 (IHO)联合组建的国际咨询委员会具体负责… 相似文献
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On the Uncertainty of Archive Hydrographic Data Sets 总被引:2,自引:0,他引:2
《Oceanic Engineering, IEEE Journal of》2006,31(2):249-265
As the international hydrographic community continues to address the question of irreducible uncertainty in modern surveys, a similar question must be asked of archived vertical beam echosounder (VBES) and leadline data sets. The Office of Naval Research funded STRATAFORM project surveyed an area of the New Jersey shelf around 39$^circ$ 12' N 72$^circ$ 50' W using an EM1000 multibeam echosounder (MBES). This area is also covered by National Oceanic and Atmospheric Administration surveys from 1936 to 1938 (from early visual indicating fathometers) and 1975–1976 (VBES). The analysis shows that the earlier data are biased in deeper water, most probably because of “hydrographic rounding” or instrument limitations, and may be unrecoverable, but that the VBES data appear approximately unbiased. Estimates of uncertainty for a surface model generated from the archive data are constructed, taking into account measurement, interpolation, and hydrographic uncertainty (addressing the problems of unobserved areas and surface reconstruction stability). Comparison of predicted depths against the MBES data shows that the VBES-derived surface is consistent given the quoted uncertainty and that the uncertainty corresponds with appropriate hydrographic survey standards. However, spatial aliasing of the VBES surface is observed, which may be the limiting factor in the applicability of this data. 相似文献