Abstract :
More and more applications can benefit from having 3Dinformation or 3D terrain knowledge. After describingthe general principles of digital terrain modeling, weconcentrate on the matching step used in thestereoscopic process. Limitations encouraged us toextend the approach to multiple views, in order toautomate further the digital terrain modeling.But other ways are also possible to produce 3D terraininformation such as using different imagery (videosequences or SAR imagery) or topographic maps. Finally,when dealing with the DTM (Digital Terrain Model) orDEM (Digital Elevation Model) produced, one often hasto cope with fusion and mosaicking problems.
