DM-11 - Hierarchical data models
![](https://gistbok.ucgis.org/sites/default/files/styles/blog_image/public/BoK1_Cover_3.jpg?itok=CviTlyRF)
- Illustrate the quadtree model
- Describe the advantages and disadvantages of the quadtree model for geographic database representation and modeling
- Describe alternatives to quadtrees for representing hierarchical tessellations (e.g., hextrees, rtrees, pyramids)
- Explain how quadtrees and other hierarchical tessellations can be used to index large volumes of raster or vector data
- Implement a format for encoding quadtrees in a data file
DC-19 - Ground verification and accuracy assessment