Converting to Vector

After doing cropping and some reclassifying (we use slopes in our previous examples). We'll convert our SRTM based map (raster) to vector. While vector map we can create the PostgreSQL table from our map.
Access menu: File > Map Type Convertions > Raster to Vector Map.
Set "smooth corner", "use raster values as categories", select our latest srtm modified map as source (and also assign new map name vor vector name which also used as PostgreSQL table name). Also select "area" as feature type
Click "Run" to start converting (we can watch the process via GRASS output window"
It takes a while, depend on the complexity and the size of our map.
Display the vector map using "Add Vector Layer" icon, select our latest generated vector map, disable the "centroids" option, set "random colors" for "fills area".
On display windows click "display active layers" icon to view the result (don't forget to disable other layers if needed)
Now we can use "query" icon on display windows and click the query pointer on any part of the map to get information on that point and view the detailed information on output windows