激光扫描测高技术的发展与现状

回顾了机载激光扫描测高技术的发展历史，总结了当前国内外的研究现状，展望了今后发展趋势及应用前景，并指出了机载激光扫描测高目前还有待于进一步解决的关键问题，最后对我国发展研究应用这一技术提出了若干建议。

Progress of Airborne Laser Scanning Altimetry

The trends and prospect of airborne laser scanning altimetry in the near future are expected.The unsolved crucial problems in airborne laser scanning altimetry at present are pointed out.Geo_spatcial information technology is the focus research in the geo_science world presently.Information capturing,processing as well as application are the three main items.At the end of the 1980's of 20th,airborne laser scanning altimetry (ALSA) is an emerging and attractive technology in the field of remote sensing that is capable of rapidly capturing three dimensional geo_spactial information in multi_scales,and also give us a new technology for obtaining short time resolution and high spactial resolution data.Data capturing is continuous,not manually taken point to point,which also makes the automatic and intelligent data processing feasible.Laser pulse can partially penetrate the forest canopy,and the topography under the canopy can be derived directly.It is impossible for traditional survey methods,such as photogrammetry and plane surveying method.ALSA systems are opening new possibilities for a variety of survey applications and data end_users.ALSA is expected to bring a new revolutionary for surveying and mapping.Laser scanner systems available on the market are presently in a fairly mature state of art while the processing of ALSA data still is in an early phase of development.The algorithms and models for data processing are not robust and adaptive.The emergence of robust,reliable software tools that are available to the entire community will be one of the most significant areas of change in the next five years.Currently,the vast majority of the processing,manipulation and classification of ALSA data is conducted using proprietary software developed independently by research,the data providers or provided by the sensor manufacturer to its clients but not available as a separate package.