The visualization of scientific computation is spatial data field visualization. Scalar

vector and tensor quantity are principal parameters to define multi

d

imensional data field in linear electromagnetic system. Based on cause and effect rule of instantaneous change electromagnetic system. The response of remote sensing sensor to the electromagnetic field can be regarded as the reflectance of ground electromagnetic field. The pixel is the digital media to record the reflectance. Because the linear connection between ground electromagnetic field and multi

b

and DNS

the digital image can be expressed as multi

d

imensional spatial data field. In multi

d

imensional linear vector space

values of data field can be calculated

differentiated

analyzed and the angle function also can be formulated in the space. The mapping of useful weak feature in remote sensing data field is also carried out based on angle analysis.