ISPRS Workshop on Service and Application of Spatial Data Infrastructure, XXXVI(4/W6), Oct.14-16, Hangzhou, China 
197 
COLLABORATION OF REAL TIME GIS AND SPATIAL DATA 
FOR LARGE SCALE MAP 
Aki OKUNO, Sota SHIMANO and Masaaki SHIKADA 
Kanazawa Institute of Technology (KIT) Nonoichi-machi Ishikawa 921-8501, JAPAN 
E-mail: a6400217@venus.kanazawa-it.ac.jp, al23351 l@jupiter.kanazawa-it.ac.jp 
shikada@neptune.kanazawa-it.ac.jp 
Key Words: REAL TIME GIS, GIS, GPS, RTK-GPS, VRS-GPS, Remote Sensing, Large Scale Map 
ABSTRACT: 
Much local government has been using large scale digital maps with Geographic Information System (GIS). However, the updating 
method of a map is not established yet. The purpose of this study is the real-time renewal of the digital map for local government by 
Kinematic Global Positioning System (RTK-GPS). REAL TIME GIS is the system for real-time updating at the field site by using 
RTK-GPS, GIS and cellular phone. First, change of the city is easily found that the Remote Sensing imageries are able to overlay 
with digital map by using GIS. Next, position of changed area was measured by RTK-GPS. But, RTK-GPS data did not correspond 
with digital maps because of different geodetic system. It is necessary to transform digital maps of an old geodetic system to new 
ones. In order to transform map coordinate, the parameters were calculated using Affine Transformation. In this paper, these 
parameters were named “High-Accuracy Regional Parameter (HARP)”. Actual experiment was performed at two places in the 
narrow area at Kanazawa district in Japan. It was verified how far there are differences between BaseMap (BM) and RTK-GPS 
measuring data. As a result, the difference was 5~10cm at longitude and 30 cm at latitude. The differences at longitude are allowed in 
large scale digital map. It is suggested that the process of REAL TIME GIS and HARP should be introduced to the work of local 
government. 
detail. The changed area is surveyed by using RTK-GPS. RTK- 
Much local government has been utilizing the Base Map (BM) GPS is able to survey absolute position with high accuracy. 
facilities. GIS will be able to work efficiently and to reduce phone and RTK-GPS. On the study, system was defined as the 
mapping costs. Furthermore, by sharing the data with their REAL TIME GIS, i.e., collaboration of Remote Sensing, GPS 
position in local government, it is possible to improve the and GIS is most important point, 
service to a citizen. However, the maintenance and renewal of a 
of a map is not established yet, and there are very few April 1, 2002. Ellipsoid of new geodetic system of Japan is 
successful examples. The purpose of this study is establishment almost equal WGS-84 of GPS. However, most of the digital 
collaboration of REAR TIME GIS and spatial data. In this study, spatial data means Remote Sensing imageries and Real-time 
1. INTRODUCTION 
GIS, it is possible to find the changed houses at urban area in 
by GIS in order to support urban planning and management of Simultaneous update of digital map is possible using cellular 
map database need much labor and time. The updating method Japan adopted new general standard for a map geometry since 
to update of the large scale map for local government using 
Remote Sensing, GPS and GIS. 
map of local government is still Tokyo Datum of old geodetic 
system. In order to correspond with two kinds of data which 
have different geodetic system, it is necessary to transform 
coordinates. 
In this paper, Remote Sensing means high-resolution satellite 
imageries (HRSI). By overlapping HRSI and digital map with 
Field sites 
GIS server 
Renewal of the map can be 
completed very quickly. 
Figure 1. Concept of “REAL TIME GIS'