Undersized polygons - remove?

posted Nov 28, 2011, 5:20 PM by David Pairman   [ updated Nov 30, 2011, 7:16 PM ]
There are many polygons smaller than the LCDB  minimum map unit size of 1 hectare. Should we remove these, and if so, at what threshold?  

The LCDB claims a minimum map unit size of 1 ha. We’ve removed some of the really small polygons (< 0.05 ha) but among the 400,000 polygons in the database there still remain 67,000 polygons (17%) smaller than a hectare, 16,000 polygons (4%) smaller than half a hectare and 1,200 smaller than 0.2 hectares. From our observation, the smaller they are the less likely these polygons are to resolve any real difference in land cover so we’re contemplating a further elimination step before release in July. What do you think?

Collaborating agencies: Please leave your views as comments below, along with your name/organisation.