Surface 是微软公司( Microsoft)旗下一系列使用 Windows 10(早期为 Windows 8.X)操作系统的电脑产品,目前有 Surface、Surface Pro 和 Surface Book 三个系列。 2012 年 6 月 18 日,初代 Surface Pro/RT 由时任微软 CEO 史蒂夫·鲍尔默发布于在洛杉矶举行的记者会,2012 年 10 月 26 日上市销售。

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The novel Locally Refined B-spline (LR B-spline) surface format is suited for representing terrain and seabed data in a compact way. It provides an alternative to the well know raster and triangulated surface representations. An LR B-spline surface has an overall smooth behaviour and allows the modelling of local details with only a limited growth in data volume. In regions where many data points belong to the same smooth area LR B-splines allow a very lean representation of the shape by locally adapting the resolution of the spline space to the size and local shape variations of the region. The surfaces generated approximate the smooth component of a cloud of data points within user specified tolerances. The method can be modified to improve the accuracy in particular domains and selected data points. The resulting surfaces are well suited for analysis and computing secondary information such as contour curves and minimum and maximum points. The surfaces can be translated into a raster or a tessellated surface of desired quality or exported as collections of tensor product spline surfaces. Data transfer can also be performed using Part 42 of ISO 10303 (the STEP standard) where LR B-splines were published in 2018.

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