12. IMODI GRASS

GRASS（Geographic Resources Analysis Support System，地理资源分析支撑系统）是一个非常有名的含有大量很有用的GIS功能的开源GIS系统。它自从在1984年发布后，做了大量的改进，加入了许多的功能。QGIS允许你直接使用GRASS的强大的GIS工具集。

• 12.1. Lesson: GRASS Setup
  • 12.1.1. Follow Along: Start a New GRASS Session
  • 12.1.2. Follow Along: Start a New GRASS Project
  • 12.1.3. Follow Along: Loading Vector Data into GRASS
  • 12.1.4. Follow Along: Loading Raster Data into GRASS
  • 12.1.5. Try Yourself Add Layers to Mapset
  • 12.1.6. Open an existing GRASS Mapset
  • 12.1.7. In Conclusion
  • 12.1.8. What's Next?
• 12.2. Lesson: GRASS Tools
  • 12.2.1. Follow Along: Create an aspect map
  • 12.2.2. Follow Along: Get basic statistic of raster layer
  • 12.2.3. Follow Along: The Reclass Tool
  • 12.2.4. Try Yourself Reclassify with your rules
  • 12.2.5. Follow Along: The Mapcalc Tool
  • 12.2.6. In Conclusion