Mapping field data collection is not only the precondition and foundation of mapping projects, but also the most complex and difficult work in mapping projects.

测绘外业数据采集是测绘项目的前提与基础，也是整个测绘项目中最复杂、工作环境最艰苦的工作。

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The article mainly studies the field data collection, length calculation method, sag correction and temperature mend, and analyzes and discusses the measuring precision.

主要研究内容有外业数据采集、长度计算方法、垂度改正、温度改正，并且对测量精度进行了分析和探讨。

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The function of field data collection, spatial data management and information distribution are integrated in the platform which involves almost aspects of the process of land survey.

平台将外业数据采集、空间数据管理和信息发布等功能集成为一体，基本涵盖了土地调查监测的全过程。

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The Culture for Development Indicator Suite (CDIS) provides a timely response to these challenges, building on the current favourable political context, greater capacity for data collection, and the critical mass of field experiences from large-scale projects.

UNESCO: Culture for Development Indicators