地理信息.移动要素的规划

[中文适用范围]： 该国际标准定义了一种描述作为刚体移动的特征的几何形状的方法。 这种运动具有以下特点。 a) 要素在由 ISO 19107 中指定的空间对象组成的任何域内移动。 b) 要素可以沿着计划路线移动，但也可以偏离计划路线。 c) 运动可能会受到物理力的影响，例如轨道力、重力或惯性力。 d) 要素的运动可能影响其他要素或受其他要素的影响，例如： 1) 移动要素可能遵循预定义的路线（例如道路），可能是网络的一部分，并且可能在已知点（例如公交车站）改变路线，航路点）。 2) 两个或多个移动特征可能被“拉”在一起或被推开（例如，飞机在飞行期间加油、捕食者检测并跟踪猎物、难民群体联手）。 3) 两个或多个移动特征可能被限制在一段时间内维持给定的空间关系（例如拖拉机和拖车、车队）。 本国际标准不涉及其他类型的功能变更。 未解决的变化示例包括以下内容： -- 特征变形。 ——特征或其关联的连续性。 ——地物非空间属性的变化。 要素的几何表示无法嵌入到包含其他要素的几何表示的几何复合体中，因为这需要随着要素的移动而更新其他要素的表示。 由于本国际标准涉及要素运动的几何描述，因此它没有指定根据地理标识符描述要素运动的机制。 ISO 19133 已部分完成此操作。 [外文原描述]： ISO 19141:2008 defines a method to describe the geometry of a feature that moves as a rigid body. Such movement has the following characteristics. The feature moves within any domain composed of spatial objects as specified in ISO 19107. The feature may move along a planned route, but it may deviate from the planned route. Motion may be influenced by physical forces, such as orbital, gravitational, or inertial forces. Motion of a feature may influence or be influenced by other features, for example: The moving feature might follow a predefined route (e.g. road), perhaps part of a network, and might change routes at known points (e.g. bus stops, waypoints). Two or more moving features may be “pulled” together or pushed apart (e.g. an airplane will be refuelled during flight, a predator detects and tracks a prey, refugee groups join forces). Two or more moving features may be constrained to maintain a given spatial relationship for some period (e.g. tractor and trailer, convoy). ISO 19141:2008 does not address other types of change to the feature. Examples of changes that are not adressed include the following: The deformation of features. The succession of either features or their associations. The change of non-spatial attributes of features. The feature's geometric representation cannot be embedded in a geometric complex that contains the geometric representations of other features, since this would require the other features' representations to be updated as the feature moves. Because ISO 19141:2008 is concerned with the geometric description of feature movement, it does not specify a mechanism for describing feature motion in terms of geographic identifiers. This is done, in part, in ISO 19133.