What are the main remote sensing data usually used for interpretation?

The so-called remote sensing data mainly refers to the current common aerial and satellite photos and their digital data (i.e., geological, geomorphological, hydrological, meteorological, vegetation, soil, geophysical and geochemical data and various previous work results).

1, aerial photo

Aerial photos can be divided into full-color black and white, natural color, infrared color, multi-band aerial photos and so on. It is a central projection with a skewness of less than 3 degrees, accurate central part and distorted edges; According to the calculation that the navigation bands overlap by 56-60% and 15-20%, it is necessary to observe the object under the stereoscopic mirror, and the image details are obviously better than those of the satellite photos.

2. Satellite photos

Satellite remote sensing images have color and black and white, and color images have true color and false color. That is, different kinds of satellite data: scanning and photography. In the early days, it was the MSS multi-center scanning film of ERTS. There are many satellite data with different resolutions. In view of the actual situation of economy, practicability and project work requirements, most industries in our province use TM or TM/ETM data for various remote sensing interpretations.