数字投影技术的发展，可以用较低的成本得到高质量的图像投影。但当这些投影技术应用于曲面幕以及球幕的时候，却无法保证所投影的图像在屏幕上拉伸而没有变形。为了使站在屏幕前任何位置的观察者能够看到不失真的图形，有必要对投影前的图像进行适当 ...

[This article was first published in Army Sustainment Professional Bulletin, which was then called Army Logistician, volume 2, number 5 (September–October 1970), pages 4–7, 39. The text is reproduced ...

[This article was first published in Army Sustainment Professional Bulletin, which was then called Army Logistician, volume 3, number 1 (January–February 1971), page 35. The text, including any ...

Landmark Information Group has announced the launch of Promap Labs; a new online portal that gives architects, surveyors and land or property developers the ability to test brand new digital mapping ...

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Landmark Information Group has announced that HM Land Registry data has been made available within its Promap Labs portal, as part of a time-limited trial that commences today. The trial has been ...