本文件确定了确定遥感像素在图像坐标中的位置与其地理位置之间关系所需的信息。它支持利用遥感图像。它定义了要与图像一起分发的元数据，以便用户能够根据观测结果确定地理位置。 本文件规定了提供支持地理定位信息的几种方式。 a） 它可以作为传感器描述提供，包括严格构建PSM所需的相关物理和几何信息。对于需要精确地理位置信息的情况，本文件确定了用于严格构造将二维图像空间与三维地面空间关联起来的PSM的数学方程，以及相关传播误差的计算。 本文件提供了三种类型的无源光电/IR传感器（框架、推帚和拂帚室）和主动微波传感系统SAR的详细信息。它提供了一个框架，通过该框架，这些传感器模型可以扩展到其他传感器类型。 b） 它可以作为TRM提供，使用系数基于PSM的函数，以便它们提供精确地理定位的信息，包括误差计算，与它们所取代的PSM一样精确。 c） 它可以作为CM提供，根据观测到的一组GCP的地理位置与其图像坐标之间的关系提供功能拟合。 d） 它可以作为一组GCP提供，用于开发CM或完善PSM或TRM。 本文档既没有指定用户如何获取地理位置数据，也没有指定用户生成的数据的格式或内容。

This document identifies the information required to determine the relationship between the position of a remotely sensed pixel in image coordinates and its geoposition. It supports exploitation of remotely sensed images. It defines the metadata to be distributed with the image to enable user determination of geographic position from the observations. This document specifies several ways in which information in support of geopositioning can be provided. a) It may be provided as a sensor description with the associated physical and geometric information necessary to rigorously construct a PSM. For the case where precise geoposition information is needed, this document identifies the mathematical equations for rigorously constructing PSMs that relate 2D image space to 3D ground space and the calculation of the associated propagated errors. This document provides detailed information for three types of passive electro-optical/ IR sensors (frame, pushbroom and whiskbroom) and for an active microwave sensing system SAR. It provides a framework by which these sensor models can be extended to other sensor types. b) It can be provided as a TRM, using functions whose coefficients are based on a PSM so that they provide information for precise geopositioning, including the calculation of errors, as precisely as the PSM they replace. c) It can be provided as a CM that provides a functional fitting based on observed relationships between the geopositions of a set of GCPs and their image coordinates. d) It can be provided as a set of GCPs that can be used to develop a CM or to refine a PSM or TRM. This document does not specify either how users derive geoposition data or the format or content of the data the users generate.