In the investigation of land use

we can recognize more categories of land use with the nfrared colour air-photos than black-white panchromatic photos

according to the tone and he farming calendar. Meanwhile

we can measure the area of the canal in the field with infrared colour air-photos

depending on the obvious diffevences in the near infrared spectral values between vegetation and water body. Then data are corrected by way of the regression equation establisher by the field samping

thus

much field work can be cut down in this way. Therefore the infrared colour air-photo is suitable for land use surveying in the eastern farming region. Through the analyses of the TM image in Beijing area

it is shown that the geometric resolution and spectral resolution of the TM image is better than that of MSS image. The ability for analysing the land use category in TM image is twice recognizable as much as that in MSS image. The analyses show that the TM image is suitable for the land use survey （scale 1:100000） in the north and west parts of China.