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Poster Session
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The comprehensive analytical mapping on the Chinese territory satelite
Analytical thematic interpretation and series mapping
The Beijing-Tianjin-Tangshan region is a developmental and constructional area with a high research level. Provided with a great deal of scientific data, to carry out the regional comprehensive thematic mapping by using multi-data of the Territory Satellites remote sensing is an important method for the analytical remote sensing mapping.
- Analysis and mapping on the Hydrological Ground
The hydrological ground is a geographical-geological element which influences and controls the formation, migration, storage and quality of water resources. According to the factors exerting influences on the quantity of water resources, the hydrological ground map was synthetically compiled on the basis of the remote sensing data of the Territory Satellites and other aerial photographic methods, such as the maps of morphological elements, litho logical types, vegetation covers, etc. The classification of these elements maps was mainly based on the leading factors which directly or indirectly influence the yields of water resources. The classified types are named as, for example, moderate vegetation cover-crystalline rock-middle mountain, and the like . Such, on the basis of the hydrological ground, the plenty of data acquired by the normal experiments can be organically combined with the types of hydrological ground, furthermore, the calculation parameters of different hydrological ground can be given regularly, and the quantity of water resources in a peculiar region can be calculated out through the concerned mathematical models. The experimental results by this method are very appropriative to those by the normal calculation. This makes us believe that the method has the broad future for application with the progresses of identical techniques for numerical images and the computer-assisted mapping, and with the supportes provided by the GIS
- Analytical Mapping for land Utilizations
The concentrated large and medium-sized cities, dense population, developed industries and minings, vigorous tourism, all of these have rendered new relationships between the structures and proportions or urban and rural land uses. In view of this practical issue, the interpretation mapping can be accomplished by full use of the clear identities of non-agricultural land elements, such as settlements, water bodies , transports , industrial and mining sites. Taken as an example, the urban residential area can be marked by the authentic shapes in the images, this can not only reflect the distribution density of urban residential areas in the region, but also be helpful to calculate their areas occupied . Through the analysis on the non -agricultural land in the images, and the implementation of the measurement technology of bi-reducing parometers, the various data of land uses can be obtained on the unit of county. Then the data were input into a computer and the second data was analyzed for mapping . The maps accomplished are the index map of land background -development level, the map of building area per capita.
- The Map of Agricultural Middle -Low Yield Land Types
The characteristics of land quality can not conspicuously show in the present land use map, but quality characteristics of badland and degenerated land can be demonstrated to some extent in the remote sensing imageries. By means of the regional differentiate laws among various eco-environmental relations. Hence, the analytical mapping on the saline-alkali soil, depression waterlogged field, shifting-sand area, polluted land, are the very important measures for middle low yield lands improvement. Those types of land, can generally be analyzed according to their images colors and the related marks. For instance, the erosion land can be divided into different erosion grades by geo-related analysis on the densities of water systems and gullies, the coverage of vegetation, human producting activities, etc. While, the erosional land's distribution is closely related with the shifting-sand land.
- The Investigation Mapping on the Forest Land and the Land Suitable for Forestry
The major forests distributed in the region are natural secondary forests and artificial forests. It is of great significance to survey the forest resources, especially the distribution of the land suitable for forestry applying the geoscientific and biological principles of remote sensing. The division and interpretation of the land suitable for forestry are mainly made on the basis of its eco-environmental conditions, indicator plant communities, as well as imageries features. For example, mountain deciduous shrubberies are an important indicator community of the land suitable for forestry, they reflect the different eco-environmental conditions: mountain meadows are also an indicator community of the mountain land suitable for forestry, particularly for temperate forest; besides , lowland meadows, halo-vegetation, sandy vegetation are all the indicator communities of the plain land suitable for forestry. The total area of the land suitable for forestry was calculated about 860,000ha accounting for over 15% of the total land area. There for, great emphasis must put on to construct the land suitable for forestry for the
forestry for the purposes of developing forestry and improving eco-environment of the region.
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