查询词典 map projection

Then this thesis presents another SLAM algorithm-the Relative Map Filter, The RMF is however disadvantaged by the inability to guarantee consistency of the estimated relative map. The following sections introduce a new navigation filter - the Geometric Projection Filter or GPF. The consistency of the estimated relative map is enforced by the application of the constrained estimator to an inconsistent relative map produced by a standard RMF.

然后介绍了SLAM问题的结构，分析了绝对地图滤波器的性质，介绍另一种解决方法—相对地图滤波器，但是相对地图滤波器产生不一致的相对地图，因此在相对地图滤波器的基础上应用约束估计产生一致的相对地图，这就是几何投影滤波器，从而有效的解决了SLAM问题。

In this paper, the theories of lunar control network foundation and lunar map projection are studied. Three foundation methods of lunar control network and the progress in American lunar control network are summarized and analyzed.

月球大地测量是月球探测的主要任务之一，本文主要对月面大地控制网的建立理论以及月球投影的理论和方法进行研究。

The squished rainbow squares can be roughly fixed by scaling the cylindrical map projection in 'Y'.

彩虹广场的挤压，大致可以修复缩放'的圆柱形地图投影Y键。

The type of map projection has diverse.

地图投影类类长样。

The selection of map projection is very important for the production of maps. Its primary task is to decide the mapping equations for the coordinate conversion from the sphere to the plane.

制作地图过程中，选择投影是一个重要的程序，它主要任务系决定制图区从球面转换至平面的制图方程式。

It's obviously that it's not practical if you use such broken and wrinkled plane mapping. So we must adopt special methods to spread the curved surface, which is called map projection theory.

若用这种具有破裂或褶皱的平面绘制地图，显然是不实用的，所以必须采用特殊的方法将曲面展开，使其成为没有破裂或褶皱的平面，于是就出现了地图投影理论。

Mapping hemispheres and other major land areas usually entails selection of the map projection that most closely suits the data presented. In some cases , this can mean that entire sets of data must be transformed.

Mapping hemispheres 和其他重要区域在地图上的设计通常是限制继承所选择的区域，而对选择区域大部份使用精确的资料来作为代表，在某些例子中代表能够将全部的资料来一个转换。

In this paper, the author introduces component and OpenGIS including the specification of Spatial Reference System Components —Interfaces and Classes. After analyzing and comparing several methods of map projection transformation, the author chooses the inverse transformation method as the main one.

本文首先介绍了组件技术和OpenGIS规范及其有关空间参照系统的接口和组件对象的定义，在对几种地图投影变换方法进行分析比较之后，选择反解变换法作为主要方法。

In order to correct these geometric distortions on satellite SAR image, and cooperate this information on SAR image with the information from other sensors, it is necessary to geocode original SAR image, and obtain correct standard geocoded image in the defined map projection.

为了校正星载SAR图象的几何畸变，使SAR图象上的数据信息和其它传感器上得到的信息进行融合，必须对星载SAR原始图象进行地理编码，得到校正后的统一的地图坐标系上的标准地理编码图象。

The sixth part: Studies on the dynamic changes of soil retention function value of ecosystem in YUYANG District. Utilized ERDAS8. 5 to interpret the remote sensing image and get LUCC data and vegetation information of YUYANG District. Utilized R2V5. 5 to digitize administrative map, topographic map, vegetation picture, soil distribution map and meteorological website map. Utilized ARCINFOR8. 3 to change every digitization layer to the same projection, to generate Tyson polygon, to structure DEM and do vector polygon overlay. Utilized ARC VIE W3. 3 to obtain the grid data topographic slope and slope length from DEM data of YUYANG District, and then, turned every coverage layer into grid layer and do grid polygon overlay to gain data about dynamic changes of value of soil retention of ecosystem in YUYANG District, at last, the author analyzed the features of the spatial-temporal changes and its reason.The seventh part: Studies on the dynamic changes of fixing drifting sand against wind function value of ecosystem in YUYANG District.

第六部分：榆阳区生态系统土壤保持功能价值动态变化研究；利用ERDAS8.5对遥感数据进行解译获得榆阳区土地利用数据和植被信息，利用R2V5.5数字化榆阳区政区图、地形图、植被图、土壤分布图及气象站点分布图，利用ARCINFOR8.3对各数字化图层进行投影转换、泰森多边形生成、DEM构建和叠加分析，利用ARCVIEW3.3从DEM数据中获取榆阳区的坡度、坡长面域数据，并将上述各图层格网化，然后通过栅格图层叠加分析和代数运算获取榆阳区生态系统土壤保持功能物质量和价值量时空动态变化数据，最后分析了其变化的时空特点及形成原因。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。