抄録
A mapping system of NOAA/AVHRR data in large area was developed. Conformal double conic projection was applied to the AVHRR imagery covering the range of about 3, 000 km x 4, 300 km extending over India, Himalaya, and Tibet. Mapping accuracy was performed at 2.2 pixels (about 2.4 km on the Earth surface) in standard deviation Color expression of projected imagery was discussed as of the false IR color expression and false natural color one composed of two AVHRR channel imageries.
Next, Asian Highways and Silk Roads were described on this satellite imagery. The new road map on the satellite imagery can be said a kind of satellite photomap. Compared with conventional layer tints map expressing topography in some school atlas, this satellite photomap seems to be different from them. The authors discussed the features and application feasibility of this newly developed satellite photomap especially in the point of basic requirement for map expression, namely, the fidelity of representation of land shape(topography) and land color (color of landscape). This satellite photomap may be useful to inform us general information of large area, like as vegetation distribution, geological structure, or climatological division.
The authors have an opinion that this satellite photomap should be adopted for school atlas. In the case, considered as a kind of thematic map like as vegetation map, or climate map, etc., conventional layer tints map can be compatible. Namely, users of new atlas will find general information of the land feature from the satellite photomap in the first place, and then, face to conventional thematic maps. Geographical understanding of users will become accurate.
