# Glossary for Geospatial Science

### Technical vocabulary defined by MicroImages

**Glossary**

**point size:** The vertical size of a text font is expressed in points. There are 72 points in an inch, so a 12-point font would be 12/72, or 1/6 of an inch tall, while a 36-point font would be 36/72, or 1/2 inch tall. Of course the heights of different letters vary (L is taller than e). The point size refers to the distance between the highest ascender in a fonts character encoding scheme (the part above the line in a letter like l or b), and the lowest descender in the set (the part below the line in a letter like g or y). (See also: bitmapped font, outline font)