PolygonLib_demo.exe is a Windows application that allows testing main possibilities of the PolygonLib core (C++ library):
- Spatial indices (are used by the selection tool and for selection of visible polygons to draw)
- Intersection, union and subtraction of polygons
- Intersection, subtraction and join of polygon sets

POLYGONS TEST DATA
 
An operation should be performed on polygons whose file names have equal first numbers 
(e.g. FI_10_1.shp and FI_10_2.shp). The number is the total count of vertices in the polygons.
The prefix FI means "few intersections", the prefix MI means "many intersections". 

POLYGON SETS TEST DATA

An operation should be performed on attr.shp and fem.shp or on attr_small.shp and fem_small.shp

attr.shp - 15000 geographical areas
fem.shp  - a mesh of 199000 triangles

attr_small.shp - 2100 geographical areas (a subset of attr.shp)
fem_small.shp  - a mesh of 42000 triangles (a subset of fem.shp)




