翻译完了大部分FME的最具基础性的“FMEFundamentals.pdf”;可惜不能上载到网易博客;可惜不能直接粘贴到网易博客。
The topics in this section describe the fundamental operating and configuration
principles of the FME translation engine: the general, generic way that FME
deals with geometry, attributes, display characteristics and coordinate systems.
This information provides the necessary foundation for detailed understanding
of the entire FME product family, and is relevant to anyone using FME mapping
files, FME Workbench, FME Universal Viewer, FME Objects, SpatialDirect,
and the FME Plug-in Software Development Kit (SDK).
The FME translator itself is driven by a set of rules held in a mapping file. This
manual also describes the syntax of these rules, and how they interact with
mapping files, the external run-time environment, and the various readers,
writers, and processing facilities of FME. Armed with a general understanding
of FME, mapping file authors will find the necessary specific detailed
information on individual readers and writers in the FME Readers and Writers
manual, and on functions and factories in the FME Functions, Factories and
Transformers manual.
Although it is possible to create mapping files from scratch, it is almost always
more efficient to use FME Workbench to create translation configurations.
FME Workbench workspaces are FME mapping files with special embedded
comments that allow Workbench to interpret and recreate a graphical display.
Workspaces can be run from the FME command line and parameters can be
passed from the command line into both workspaces and mapping files,
allowing easy batch translations to be run.
FME provides a fully configurable geo-object-relational data processing
environment with many capabilities. FME’s processing abilities provide the
building blocks for solving difficult processing tasks quickly and easily. The
result is that FME can solve both simple and complex translation and processing
problems.
In the past, new software was written for each translation situation. Over time,
this introduced a maintenance problem because it resulted in a large number of
incompatible and inflexible translator programs. FME solves this issue by
allowing the same translator program to be used to solve a variety of translation
problems.
本章描述了 Fme Translation Engine的基本操作和规则配置方面有关内容,这些内容包括:整个体系基础,以及FME处理实体、属性、显示描述和坐标体系的通用方法。这些信息为详细理解完整的Fme家族产品体系提供了必须的基础知识。同时,对任何想使用Fme Mapping files,FME Workbench,FME Universal Viewer,FME Objects,SpatialDirect和FME 插件式开发库的人也有帮助。
The FME translator 自身被内置于mapping file 的一系列规则所驱动。本章相关内容也描述了这些规则的语法,以及它们与mapping file、外部实时运行环境、各式各样的读写用户、以及处理设施之间的关系。在对FME有了一般了解之后,mapping file 作者将可以继续深入了解更准确和详细的信息,例如:从《FME Readers and Writers》手册了解读写相关信息;从《FME Funcitons,Factories and Transforners》手册了解函数和工厂相关信息。
虽然可以在草稿上全新创建mapping file,但是通常来说,使用FME Workbench来创建转换配置更高效。FME Workbench workspace是有着特殊内嵌注释、并且允许Workbench解释和重建图形显示的mapping file。
可以从FME命令行运行Workspaces,还可以传递参数到workspaces和mapping files;这样,可以很容易的进行批处理转换操作。
针对地理对象相关的数据处理,FME提供了一个完全可配置的环境,同时也提供了许多功能。FME采用流程搭建的技术,用来快速和方便的解决各种复杂的处理任务。这样,FME就可以解决各种简单和复杂的数据转换和处理方面的问题。
在过去,对于每一种转换方面的需求,都是编写全新的软件来解决。随着时间的推移,这将会产生一个维护问题,因为这导致出现了大量的不兼容又互不相关的转换程序。FME解决了这个问题――它使得一个转换器就可以解决各种转换中的问题。
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