测绘英语unit27

1、Unit 27 Large Scale DistortionsUnit 27 Large Scale Distortions房屋的提取Unit 27 Large Scale Distortions道路的提取Unit 27 Large Scale DistortionsNew words and Expressionsaddress dres n. 地址，演讲；vt. 演说，从事，忙于solely sulli adv. 单独地，唯一地breakline： 分割线，断线，断裂线solely sulli adv. 独自地，单独地diligent dilidnt a. 勤勉的，用功的，细心而继续不断的

2、flyover flaiuv n. 跨线桥（立体交叉）precipitate prisipitit, -teit v. （使）沉淀（出），析出，促使，使突然发生smear smi v. 使轮廓不清；be smeared 弄得模糊不清resultant rizltnt a. 合（成）的，组（综）合的，总的；（作为）结果（而产生）的bizarre rizltnt a. 奇异的 mitigate mitieit v. 减轻elevated structure： 高架结构，高架建(构)筑物Unit 27 Large Scale DistortionsNew words and Expressionsm

3、odel mdl n. 模拟 strategy strtidi n. 战略，策略deck dek n. 层面，桥面ramp rmp n. 坡道，平台 adjacent deisnt adj. 邻近的，毗连的void vid a. 空的，没有的interactive：,intrktiv 交互式的，人机对话diapositive：,daipzitiv 透明正片，透明阳片aliasing eilisi n. 混淆；混淆现象fascinating fsineiti a. 极有趣的，迷人的subsequent sbsikwnt adj. 后来的，随后的reseau reizu, ri- n. 网格，网状

4、物，栅网，滤屏Unit 27 Large Scale DistortionsNew words and Expressionsaffine fain v. 仿射的 commensurate with： 与相应；与相当；与approximately prksimitli adv. 大约，近似地；近于maintenance meintnns n. 维护，维修；保持enhance inh:ns, -hns vt. 提高；加强；增加resample ri:smpl n. 重新取样；重采样assessment sesmnt n. 评定；估价assign sain v. 赋值 bilinear baili

5、ni v. 双线性的 cubic convolution： 三次卷积acknowledged knlidd a. 公认的superior sju:piri, sju:p- a. 较高的，出众的，上好的stipulate stipjuleit v. 规（限，约）定discern dis:n, -z:n v. 鉴（识，辨，区，分）别，断定，判别，了解，认识Unit 27 Large Scale DistortionsNotes to the Text 1.The second strategy involves the collection of breaklines such that the

6、elevated structure is rectified to its correct position and then the interactive removal of the distortions which arise around the structure. 译文译文: :第二个策略是采集断裂线，以便高架建筑物纠正到其正确位置，然后交互消除建筑物附近出现的变形。Unit 27 Large Scale Distortions 2.It has been shown that the resolution of standard aerial film is approxi

7、mately 27 lp/mm. One resolution element is thus approximately 37 m/lp. For true maintenance of photographic resolution content a scanning resolution of approximately 15m is necessary (Light 1993). Scanning at a resolution higher than 15m will not yield additional information nor will it enhance inte

8、rpretability of the image. Scanning resolutions of 20 to 30m are common practice since they achieve good results while providing economy in terms of file size. 译文译文: :已经表明标准航空胶片的分辨率大约是27线对/mm。因此一个分辨率元素大约就是37 m/lp。为了真实保持像片的分辨内容，扫描分辨率大约需要15m。以高于15m的分辨率扫描即不会产生额外的信息也不会提高影像的解译能力。实际中通常采用20到30m的扫描分辨率，因为这样可

9、以获得好结果，而在文件大小方面也经济。Notes to the TextUnit 27 Large Scale Distortions 3.The rectification process is comprised in part of a digital resampling procedure. This resampling relies on an assessment of the intensity values of a group of pixels (from one to sixteen) to assign a value to a new pixel. The pro

10、cedure creates a blank array of pixels representing a fixed size on the ground and systematically assigns intensity values to the array. The resampling process analyzes the surrounding (input) pixels regardless of their size. Therefore it is important that the pixel dimensions of the input image be

11、equal to or smaller than those in the output image. 译文译文: :纠正过程部分包含数字重采样过程。重采样依据一组像素(从1个到16个)的亮度值的估值来给一个新像素赋一个值。该过程创建一个代表地面一个固定大小的空的像素数组，并系统地给这个数组赋亮度值。重采样过程不管像素的大小，只分析周围(输入)的像素。因此输入影像的像素大小等于或小于输出影像的像素大小是很重要的。Notes to the TextUnit 27 Large Scale DistortionsNotes to the Text 4.Digital orthophoto image

12、ry derived from aerial photography does not support automated classification the same way multispectral satellite data does. Illumination effects are such that meaningful classification cannot be achieved, particularly using black and white photography. Therefore, the importance of the resampling is limited to