Data frame was designed to store digital map data.

规定了数字地图分区存放的数据结构。

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Note: the information collected in the Digital Map Data Order form will be used for the purpose of processing the Order only.

注：数码地图资料订购表格内收集的资料只会在订购过程中使用。

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To improve the efficiency of automatic maps edge matching of massive digital map data of great regions even global ones, virtual stitching algorithm based on vector ID mapping is presented.

为了改善数字地图图幅自动接边算法在处理大区域甚至全球范围的大数据量图幅接边时效率低的问题，提出了基于矢量id映射的“虚拼接”算法。

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Much like Wikipedia, OpenStreetMap is a collaborative, crowdsourced and global project of over 650, 000 contributors dedicated to revolutionizing digital maps by creating a free, editable and interactive map of the world using data from satellites, GPS logs, local knowledge, and other sources of geographic information.

ENGADGET: Skobbler brings maps to Nook Tablet, Color with ForeverMap 2

This integration is currently on track to allow them to connect the following systems: student information, data portal, learning management, gradebook, curriculum map, collaboration tools, portfolios, and digital assets (learning resources).

FORBES: Transforming the System: One Student at a Time