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In: Wagner W., Szekely, B. (eds.): ISPRS TC VII Symposium - 100 Years ISPRS, Vienna, Austria, July 5-7,2010, IAPRS, Vol. XXXVIII, Part 7B 
LAND COVER REMOTE SENSING IMAGERY WEB RETRIEVAL IN CHINESE 
SECOND ROUND OF NATIONAL LAND USE INVENTORY PROGRAM 
NING Xiaogang 2 ’*, ZHANG Yonghong 2 
a Chinese Academy of Surveying and Mapping, 100830, Beijing, China 
ningxg@casm.ac.cn, yhzhang@casm.ac.cn 
KEY WORDS: Image Retrieval, Web Service, Remote Sensing Imagery 
ABSTRACT: 
To facilitate land cover / land use interpretation of Chinese second round of national land use inventory program, a land cover 
remote sensing imagery retrieval system was constructed based on multi-source land cover classified remote sensing images, 
ASP.NET techniques and web service. This paper presents the details of the methodologies of national level land cover remote 
sensing image classification, the architecture and functions of the system, the methodologies of table construction of the database. 
The remote sensing images was classified into 8 top-level categories, and further classified into 38 second-level categories according 
to Chinese land cover standard classes provided by Ministry of Land and Resources P.R.C. The results of this work can be easily 
browsed, checked, edited by the public or experts. 
1. INTRODUCTION 
Chinese second round national land use inventory program 
(from July 1, 2007 to December 31, 2009) is a national 
conditions and power investigation, which is very significant to 
economy and social development, the target of which is to 
make a thorough investigation of land use details, to get exact 
land use data, to construct a management system based on web 
services (Leading group office of SRNLUIP, 2008). 
To facilitate the process of the land use investigation, and to 
provide a system to verify the investigation results, a land cover 
remote sensing imagery web retrieval system is constructed, 
based on multi-time, multi-sensors, multi-resolutions, multi 
terrain conditions land cover classified remote sensing images 
(Jixian Zhang, 2010). These images belong to 8 top-level or 38 
second-level land use categories. 
This paper designs and implements the land cover remote 
sensing imagery retrieval system based on the web service and 
the ASP.NET technology. The global objective of the system is 
to offer efficient web query service for the land cover remote 
sensing sample images based on the 8 top-level and the 38 
second-level land categories. The System is used to facilitate 
the investigation work of the second round of national land use 
inventory program, especially for the interpretation of the 
remote sensing image and the verification of the inventory 
results. 
2. THE DESIGN AND IMPLEMENT OF THE SYSTEM 
2.1 The architecture and workflow 
The system is divided into four subsystems: database 
constructing subsystem ^ data importing subsystem > querying 
subsystem^ post-processing subsystem. The workflow chart is 
shown as Figure 1. 
The database constructing subsystem is mainly to construct and 
organize the database, which will offer strict management of the 
user power limitation and the regular backup ability to ensure 
the security of the data. The database is designed according to 
the principles of relational database system, and Microsoft 
Access database platform is chosen according to the size of the 
database and the capability of the system. 
Figure 1. The workflow of the system 
The data importing subsystem offers the full and strict function 
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