Q:

Only one field appears after converting .shp to raster to .asc, in QGIS

I am a beginner in the GIS world. I tried to convert the .shp map to the raster .asc map. I did Raster-> Conversion-> Rasterize then as shown below there are only 1 of 4 fields appears. So I cannot convert the map based on the field that I want.

A:

You can only use a numeric field. 
What is the type of the other fields?

