IAPRS & SIS, Vol.34, Part 7, “Resource and Environmental Monitoring", Hyderabad, India, 2002 
USING REMOTE SENSING TECHNIQUE TO MONITOR 
SYNTHETICAL LAND USE CHANGE 
Xue Yanli Li Yingcheng Chu Liangcai 
Chinese Academy of Surveying and Mapping 
16 Beitaiping Road, Haidian District , Beijing, China, 100039 
casmphrs@public3.bta.net.cn 
KEYWORDS: SPOT and TM , Marsh , Grassland, Rectification, Supervised Classification 
ABSTRACT: 
Earth observation satellite offers huge information of global environment. Using the information, the variance of climate and 
resource on our earth can be detected and analyzed. This article introduces a method of obtaining the change information of marsh, 
grassland and city from remote sensing images, i.e. TM and SPOT. Using the remote sensing technology (including rectification, 
fusion, merging, supervised classification, interpretation and etc.), images are processed and many kinds of information and their 
variety are extracted, and then the statistic data are collected and an analysis is made.Our own developed software package (PhotoRS 
and PhotoDRG) was applied in all processing. It is the only one that has been recommended as an excellent package for two times 
and has been used in processing of remote sensing images by Chinese Technology Department. The government is planning to select 
it as one of the equipment for the national basic surveying and mapping. City Tianjin is selected as a study area which has 12 
counties and occupies about 11,000 km?. The monitoring period is two years (from 1999 to 2001). 
1. INTRODUCTION 
The study has two objectives. One is to monitor the change of 
marsh in all of the counties in Tianjin in years 1999 and 2001. 
The other one is to extract the information of grassland, city 
expansion and reconstruction within the Tianjin Outer Ring 
Road. 
The method is to combine computer supervised classification 
with visual interpretation and editing. Supervise classification 
was performed by ERDAS Imagine 8.4, and visual editing with 
PhotoShop 5.0. 
The data used were TM (band7+band4+band3, 30 meter) and 
SPOT4 (10 meter) images acquired in October 1999 and 2001 
same. 
2. DATA AND METHOD 
2.1 Study Site 
The study area is located at Tianjin, with the boundary 
coordinates: from 38?34' to 40?15' of Latitude North and 
from116?43' to118?04' of Longitude east, a total area of 11,000 
km”, including 12 counties. 
The region is beside of Bohai sea. There are four kinds of main 
terrain feature: mountain, hill, plain and coast. The length of the 
coastline is 153km. The area of the farmland is 6717Km?, non- 
farmland 4590Km’ and wilderness more than 120 km? The 
main topography is low-lying. There are a lot of rivers and 
lakes in this region. It is one of the places that have the most 
plenty of marsh resources in China. 
  
respectively when vegetation is exuberant. The dates of images 
acquisition were different and the region they covered is the 
2.2 Data 
2.2.1. Images: For marsh study, SPOT and TM images of 2001 
and 1999 were selected. For grassland study, IKONOS images 
of 2001 were selected. All of the images are illustrated in table 
1: 
  
N 
  
  
  
  
  
  
  
  
  
  
  
  
  
  
Time 
Path/Row 
Oct. 1999 Oct. 2001 Annotation 
Satellit 
122/32 122/32 
TM «2 Sceness 122/33 122/33 
281/270 281/270 
281/271 281/271 
282/270 282/270 
SPOT 7 Scenes» 282/271 282/271 
282/272 282/272 
284/270 284/270 
10% cloud in 284/271 
284/271 284/271 of 2001 
IKONOS Merged image of Jul. and Aug.,2001,which covers area within the Tianjin Outer 
(2 Scenes) Ring Road. 
  
  
Table 1. Selected Images 
784