最近几年来，地理信息系统无论是在理论上还是应用上都处在一个飞速发展的阶段。 GIS被应用于多个领域的建模和决策支持，如城市管理、区划、环境整治等等，地理信息成为信息时代重要的组成部分之一； “数字地球”概念的提出，更进一步推动了作为其技术支撑的GIS的发展。 与此同时，一些学者致力于相关的理论研究，如空间感知、空间数据误差、空间关系的形式化等等。 这恰好说明了地理信息系统作为应用技术和学科的两个方面，并且这两个方面构成了相互促进的发展过程。
This case study demonstrates how to build a complete < AppML > Internet application with the ability to enumerate, edit, and search for information against several tables in the database. We will use the existing database, named Demo. For each table in the database, we will: Create a prototype model Create a prototype HTML page Create an application model Create a HTML template Create a complete application For the case study, we used a subset of the Northwind database pre-installed with MS Office. This database is well known and is easy to test, whether using PHP or classic ASP or ASP.NET. The Demo database contains several tables with data, as follows: Customer Address City Country Around the Horn 120 Hanover Sq. London UK Berglunds snabbkj ø p Berguvsv ä gen 8 Lule å Sweden Blauer See Delikatessen Forsterstr. fifty-seven Mannheim Germany Blondel p è re et fils 24, place Kl é ber Strasbourg France B ó lido Comidas preparadas C/ Araquil, 67 Madrid Spain Bottom-Dollar Markets 23 Tsawassen Blvd. Tsawassen Canada Supplier Address City Country Exotic Liquid 49 Gilbert St. London UK New Orleans Cajun Delights P.O. Box 78934 New Orleans USA Grandma Kelly’s Homestead 707 Oxford Rd. Ann Arbor USA Tokyo Traders 9-8 SekimaiMusashin o-shi Tokyo Japan Cooperativa de Quesos’ Las Cabras’ Calle del Rosal 4 Oviedo Spain Mayumi’s 92 Setsuko Chuo-ku Osaka Japan Pavlova, Ltd. 74 Rose St. Moonie Ponds Melbourne Australia Specialty Biscuits, Ltd. 29 King’s Way Manchester UK PB Kn ckebr d AB Kaloadagatan 13 G teborg Sweden Refrescos Americanas LTDA Av. Das Americanas 12.890 S o Paulo Brazil Produc QuantityPerUnit UnitPrice UnitsInStock Chai 10 boxes x 20 bags 18 39 Chang 24-12 oz bottles 19 17 Aniseed Syrup 12-550 ml bottles 10 13 Chai 10 boxes x 20 bags 18 39 Chef Anton’s Gumbo Mix 36 boxes 21 0 Grandma’s Boysenberry Spread 12-8 oz jars 25 120 Uncle Bob’s Organic Dried Pears 12-1 lb pkgs. 30 15 Northwoods Cranberry Sauce 12-12 oz jars 40 6 Mishi Kobe Niku 18-500g pkgs. 97 29 Ikura 12-200 ml jars 31 31 4.6.1. What will we create? ¶
4.6.2. Demo database ¶
4.6.3. Customers ¶
4.6.4. Suppliers ¶
4.6.5. Products ¶