For fast calculating the signed distance from spatial point to STL model, a reference ball method was put foward based on linear octree.
针对如何快速求取空间点到STL模型表面有符号距离这一问题，提出一种基于线性八叉树的参考球方法。
The first concern in this chapter is to compute aggregation parameter which reflects the aggregation level of the spatial point pattern.
第四章主要介绍了空间点过程以及点格局分析在研究种群空间分布中的应用。
However, current commercial GIS software are short of special spatial point pattern analysis module which limit the use of point pattern analysis.
然而现有的主流商业GIS软件包，缺乏专门的空间点模式分析的模块，限制了点模式方法的使用。
The rotation matrix can be linearly acquired by using only 4 vanishing points and the translation vector can be linearly solved by using only 2 spatial point objects.
该方法仅需4对消隐点象面坐标便可线性求解出旋转矩阵，再用2个空间点坐标便可线性求解出平移矢量。
The spatial table has a simple structure: a unique, integer column (objectid), one or more columns making up the primary key (copied from the source table), plus a single point-geometry column.
空间表的结构很简单：一个惟一的整数列(objectid)，组成主键的一个或多个列(从源表复制的)，以及一个点几何列。
Note that, following the paradigm of the DB2 Spatial Extender, the offset is subtracted from the floating point value before the scale factor is multiplied in.
注意，按照DB 2Spatial Extender范例，在乘上比例系数之前，浮点值要减去偏移量。
The point column is registered as a spatial column using a spatial Extender procedure, associating it with the right SRID.
使用一个Spatial Extender过程将点列注册为空间列，这会将它与正确的SRID关联起来。
Only in the pole axis theory, do the point and the line become the endogenetic variable and they form the two indispensable factors of constructing spatial structure.
只有在点—轴系统理论中，点、线才都是内生变量，是构建空间结构模型的不可或缺的两大要素。
Point variability and spatial variability of soil property parameters are associated by means of stochastic field model of soil profile.
引入土层剖面随机场模型，把土性参数的点变异性和空间变异性联系起来。
In order to satisfy the consistency of the feature point spatial matching, a novel algorithm for video interpretation based on constraint of epipolar line is proposed.
为了满足目标特征点的空间匹配一致性要求，提出了一种基于外极线约束条件新的视频图像判读处理模式。
On these bases, the length resolution, fiber coupling point resolution and maximum sensing fiber spatial of the sensor were obtained.
在此基础上分析了传感器的空间分辨力、光纤耦合点分辨力、最大传感光纤长度。
The study on the relationship of the urban traffic and urban spatial structure is not limited to a certain point in time, and is conducted from time lapse's angle.
对城市交通与城市空间结构关系的研究不仅仅局限于某一时点，而且从时间推移的角度对两者关系进行了动态研究。
Through the segmentation of the spatial box bounded by point cloud, efficient extraction of boundary information is implemented.
通过对点云数据进行空间三维划分，实现了边界信息的高效提取。
Spatial navigation refers to the ability to locate one's own point in any 3d spatial space, and, from there, navigate to another point.
空间导向是指能够掌握自己在3维空间的位置，并且可以从该位置将自己引导至空间中另外一点的能力。
Data sets of point and interval dimensions are important in spatial database system and GIS.
点和区间混合型维度数据集是空间数据库系统和GIS中重要的数据对象。
In this paper spatial data organization structure chart of seamless GIS is advanced, the point, line, area, complex feature, DTM data and attribute merge table of block are discussed in detail.
本文给出了无缝gis空间数据组织结构图，并详细列出了图块的点、线、面、复杂要素、DTM数据以及属性拼接表的数据结构。
Our understanding of cities in anything more than casual terms usually starts with observations of their spatial form and structure at some point or cross-section in time.
通常，随着我们及时对城市空间布局从多个角度或者横断面进行观察，我们对其认识就开始加深了，而不是(仅仅停留在)肤浅的印象上面。
Results GIS databases were established and local digital basic map, resident GPS point map, disease spatial distribution map and cluster spatial map were obtained.
结果建立了地理信息分析系统，研究获得基础数字地图、GPS居民点分布图、疾病分布图、组群分布图。
All of these material entities spring at their point of origin from the same source as the topological manifold of space, that is, from a higher spatial dimension.
所有这些物质实体从同一来源回到原点如同空间的拓扑流行，也就是说，来自更高的空间维度。
Point cluster object contains much structured information in spatial distribution, which is interesting for the research of spatial analysis and map generalization.
群点目标隐含的空间结构化信息是空间分布分析、地图综合感兴趣的内容。
The growth-level model, point-axis model, circle-layer model are the fundamental models for the spatial layout of regional tourism layout.
增长级布局模式、点轴布局模式、圈层布局模式是区域旅游业空间布局的基本模式。
Point, line and area are basic elements in GIS vector spatial data.
在矢量GIS空间数据中，点、线和面目标是它的基本要素。
However, the spatial data model of main GIS systems only reflect knowledge of management and manipulation objects in field of cartography, such as point, line and poly geometry objects.
当今的GIS系统的空间数据模型，主要反映地图制图领域的点、线、面对象管理与操作的几何知识。
Taking two examples, matching spatial features and their attributes and deleting reduplicate features in spatial database, indicate the technique key point of this appro.
分别以空间要素与其属性挂接和删除重复要素为例，来说明该方法的技术要点。
Spatial 3d point cloud can be quickly captured on object surface by laser scanning, however its data volume is huge.
三维激光扫描获得的点云数据，其数据量比较大。
The result shows that, the critical point of the Gauss model depends not only on the spatial dimension of the system, but also on the coordination number of the site.
结果表明，系统的临界点不仅与空间维数有关，还与晶格格点的配位数有关；
The fifth chapter is the empirical study of the spatial structural fractal of tourism system of Sichuan province and is the focal point in this paper.
第五章为四川省旅游景区（点）系统空间结构分形的实证研究。本章首先指出了对其进行分形研究的可行性；
When searching for the distributed watershed hydrological model in a small basin, first of all we need to estimate area precipitation from point hourly precipitation through spatial interpolation.
在做小流域分布式水文模型研究时，首先需要对时段降雨进行空间插值。
The main point of background space sketch class is directly uses them in it. The key of practical style is manifests the unification and the explicit spatial relations in the picture.
写实风格的关键是在画面中体现统一的、明确的空间关系，正确运用光影、透视等因素加强客观的造型、色彩、质感等的表现。
The main point of background space sketch class is directly uses them in it. The key of practical style is manifests the unification and the explicit spatial relations in the picture.
写实风格的关键是在画面中体现统一的、明确的空间关系，正确运用光影、透视等因素加强客观的造型、色彩、质感等的表现。
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