A THINKING COMING AFTER A DYNAMIC MONITORY GIS
Hong-Jing Chen, NLREIS of institute of Geography, Chinese Academy of Sciences, Beijing, 100101. P.R. CHINA
Wen-Li Chen, The Center of State Information of China, Beijing 100045, P.R.CHINA
Commission III, ICWG III / IV
KEY WORDS: 1 K001 Geomatics / GIS
2 K003 Remote Sensing
3 K018 Geography
4 K037 Soil
5 K122 DEM / DTM
6 K136 Information
7 Ke. Information Geography
ABSTRACT
This paper will discuss basic characters of digital terrain patterns on the hilly and gully landform in the typical area of the
loess plateau of China made use of remote sensing information. It will also discuss information revolution problem of Geog-
raphy based on the our work and result. They are 3 [. problem including information revolution, information technology and
information sciences with relationship between them.
Résumé
Ce papier recherche le caractére du terrain digital, par exemple les caractéres de revin, d'altitude, de pente et d'aspect, d'aprés
l'image de télédétection, sur les croupes du plateau de loess.
Sur la base d'étude, il encore discute le probléme sur la révolution de géo—information, ce sont la révolution d'information,
la technologie d'information, la science d'information et la relation entre eux.
INTRODUCTION
Soil erosion is a serious problem in the world and
especially on the loess plateau of China. So there-
fore, we used modern information technology-re-
mote sensing and GIS to research the basic charac-
ter and the process of the dynamic change on the
soil erodent environment in a typical area on the
loess plateau of China. About the introduction and
the analysis of the dynamic change process in the
experimental site. seeing [chen 1994].
THE CHARACTERS OF DIGITAL TERRAIN
PATTERNS ON THE MODERN SOIL
ERODENT ENVIRONMENT
2.1 Developed Information Resources of the High
Accuracy
We flew and captured aerial remote sensing images
of color infrared (scal 1:20000).
International Archives of Photogrammetry and Remote Sensing. Vol. XXXI, Part B3. Vienna 1996
We made pre—processed to aerial remote sensing
images including two orthoimage maps in color
infrared by Z, othocomp (Scal 1:5000 and
1:10000) and a topographical map (Scal 1:5000) to
make by ¢—120 planicomp from the image.
We made a series maps based on ortho—images in
color infrared including the map of gully and gully
network and gully edge line and so on.
We digitized these maps above and established ba-
sic data base for the analysis of the digital terrain
patterns with the support of micro—computer Dy-
namic Monitory GIS (DMGIS).
2.2 The Practice and Analysis Under-the Support.of
DMGIS
2.2.1 The Statistics and Analysis about the Charac-
ters-of the Gully Network
The total quantity of gully are 281 piece and the to-
tal length of gully is about 75km and the mean
length of gully is 267m in the experimental site of
total area 8.79 km”. Seeing table 1.
The meat
2.2.2 The
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