OGC学习课程

1.引言

由于项目需要，需要学习OGC相关地图标准，包括WMS、WFS、GML、SLD等，只是国内相关书籍大家都懂的，特向Google大师请教，得一秘籍《Open Web Mapping》——来自于世界名校美国宾夕法尼亚州立大学的在线地图学课程GEOE585。

2.课程概览

课程最终目标：使用开发源码软件和OGC标准规范进行Web地图应用程序的设计、开发和实施应用。

多说无益，看下图自然明了。几乎涵盖了OGC所有地图常用标准和规范。

3.课程目录

• Lesson 0: Orientation

• Lesson 1: Introduction to Open Web Mapping

• Lesson 2:Web Map Servers (WMS)

• Lesson 3: Web Feature Servers (WFS)

• Lesson 4: Extensible Markup Language (XML)

• Lesson 5: Advanced Web Map Servers

• Lesson 6: Geographic Markup Language (GML)

• Lesson 7: WFS Revisited

• Lesson 8: Building a Web Mapping Application

• Lesson 9: Building a Thin Custom Web Mapping Client

• Lesson 10: Open Web Mapping: Everything You Wanted to Know But Were Too Afraid to Ask

4.课程目标

可直接阅读原文。

4.1 Course Objectives

At the successful completion of this course, students should be able to:

• demonstrate a clear understanding of the Open Geospatial Consortium (OGC) web mapping standards
• demonstrate how to deploy a mapping server on the web
• explain the types of client that can be used for web mapping
• deploy a working client server for an example data set

4.2 Educational Objectives for Each Lesson

Lesson 1: Introduction to Open Web Mapping

At the successful completion of this lesson, students should be able to:

• identify the framework of open web mapping
• define open web mapping
• describe ways in which open web mapping is used
• describe the importance of open web mapping
• define international open web standards as published by the Open Geospatial Consortium
• explain the importance of international open standards to developers, users and businesses
• give examples of how international open standards apply to geography

Lesson 2: Web Map Servers (WMS) 

At the successful completion of this lesson, students should be able to:

• describe a Web Map Server (WMS)
• explain how a WMS works
• describe how a HTTP request is constructed and handled by a server
• identify the key elements in a WMS request
• identify the three types of response a WMS can make

Lesson 3: Web Feature Servers (WFS) 

At the successful completion of this lesson, students should be able to:

• describe a Web Feature Server (WFS)
• explain how a WFS works
• identify the structure of a WFS request
• distinguish between WMS and WFS
• discuss the reasons to choose one over the other either WMS or WFS
• show an understanding of the key aspects to the WFS specification

Lesson 4: Extensible Markup Language(XML) 

At the successful completion of this lesson, students should be able to:

• define what a markup language is
• list various markup languages and their uses with respect to web mapping
• define XML
• describe the use of XML in open web mapping
• explain the importance of writing well formed documents in XML
• use XML syntax rules to write well formed documents
• define XML schema
• explain the way a schema applies to an XML document

Lesson 5: Advanced Web Map Servers 

At the successful completion of this lesson, students should be able to:

• define Styled Layer Description (SLD)
• describe how SLD works
• know how to apply SLD to WMS layers
• define a cascading WMS
• explain how a cascading WMS works

Lesson 6: Geographic Markup Language (GML) 

At the successful completion of this lesson, students should be able to:

• define GML
• describe the use of GML in open web mapping
• relate XML to GML
• define application schema
• understand how to construct and apply an application schema to a GML document

Lesson 7: Building a Web Mapping Application 

At the successful completion of this lesson, students should be able to:

• define web mapping application
• define a spatial dataset
• describe the need for spatial data sets
• set up a spatial dataset
• assess the options for servers required to deploy the data on the web
• demonstrate how to deploy a web map server or web feature server

Lesson 8: Building a Thin Custom Web Mapping Client 

At the successful completion of this lesson, students should be able to:

• define a thin custom web mapping client
• discuss the concepts of building client server web mapping
• build a custom web mapping client
• build the server components needed to support the client

Lesson 9: WFS revisited 

At the successful completion of this lesson, students should be able to:

• give examples of uses of a WFS
• define gazetteer
• discuss how to build a gazetteer

Lesson 10: Open Web Mapping, everything you wanted to know but were too afraid to ask 

At the successful completion of this lesson, students should be able to:

• identify sources for web mapping information
• describe the future of Open Web Mapping