# Glossary for Geospatial Science

### Technical vocabulary defined by MicroImages

**Glossary**

**Grain Shape Index:** One of the 12 fuzzy properties that can be calculated for vector objects. The Grain Shape Index measures shape with a minimum value approximating two for long skinny polygons, pi for circles, and four for rectangles. The Grain Shape Index can be very large for fractals. The equation for calculating this property is: Grain Shape Index = Perimeter / Long Axis.