Digital Chart of the World 世界数字化图
Seamless Contiguity of Digital Chart 数字海洋地图无缝拼接的研究
digital-chart 数字海图
digital chart system 电子海图系统
highway digital chart 公路数字图
Meanwhile, post-processing techniques for multi-beam surveying system were studied more deeply. The analyzing for data error, data smoothness process, sound velocity profile correcting technique, tide correcting technique, coordinates transforming, digital chart making methods and image enhancement were discussed in detail.
作者针对此问题，提出了小型化的设计方案并解决了设计中的关键技术；同时对多波束测深设备的数据后置处理系统做了深入的研究，并系统地论述了测深数据误差分析及判别、数据平滑处理、声线修正技术、潮汐改正技术、坐标变换、数字海图的生成以及图像增强等方面的理论。
参考来源 - 多波束条带测深系统数据后置处理技术研究·2,447,543篇论文数据，部分数据来源于NoteExpress
This paper points out the quality elements of digital chart and builds its quality controling hierarcy by automatic checking way.
本文提出了数字海图的质量元素，并运用软件检查的方法来构建数字海图的质量控制体系。
At the present time, between China and some developed countries, there are some enormous differences on the publishing and administrative mechanism for digital chart.
目前，我国数字海图的发行机制未能发挥数字海图高效、便捷的应用特点，与国际上发达国家的差距较大。
In 1985, British Telecom (BT) introduced integrated digital communications network. It provides users with voice, fast delivery chart, fax, slow scan television terminals.
1985年，英国电信公司(BT)推出综合数字通信网络。它向用户提供话音、快速传送图表、传真、慢扫描电视终端等。
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