# AGGeospatialPolygons.java

`package com.franz.agbase.examples;
import com.franz.agbase.*;
public class AGGeospatialPolygons {
/**
* Demonstrates some basics of working with Polygons.
*
* @param args unused
* @throws AllegroGraphException
*/
public static void main(String[] args) throws AllegroGraphException {
// Connect to server, which must already be running.
AllegroGraphConnection ags = new AllegroGraphConnection();
try {
ags.enable();
} catch (Exception e) {
throw new AllegroGraphException("Server connection problem", e);
}
// Create a fresh triple-store.
AllegroGraph ts = ags.renew("geospatialpolygons", AGPaths.TRIPLE_STORES);
// Register namespaces
ts.registerNamespace("ex","http://example.org/");
// Get a GeoExtension instance for this store to work with geospatial features
GeoExtension geo = ts.getGeoExtension();
// Define a geospatial subtype to encode coordinates
GeospatialSubtype subtype = geo.registerCartesianStriping(0,10,0,10,.1);
geo.addSubtype(subtype);
// Define a 4-sided polygon
Polygon p1 = new Polygon(4);
p1.setSubject(ts.addPart("!ex:p1").queryAGId());
p1.addVertex(0,0);
p1.addVertex(0,10);
p1.addVertex(6,6);
p1.addVertex(10,0);
p1.setSubtype(subtype);
p1.add(ts);
// Define another 4-sided polygon
Polygon p2 = new Polygon(4);
p2.setSubject(ts.addPart("!ex:p2").queryAGId());
p2.addVertex(0,0);
p2.addVertex(0,10);
p2.addVertex(4,4);
p2.addVertex(10,0);
p2.setSubtype(subtype);
p2.add(ts);
// Define an 8-sided polygon
Polygon p3 = new Polygon(8);
p3.setSubject(ts.addPart("!ex:p3").queryAGId());
p3.addVertex(0,0);
p3.addVertex(0,10);
p3.addVertex(10,10);
p3.addVertex(6,6);
p3.addVertex(4,6);
p3.addVertex(4,4);
p3.addVertex(6,4);
p3.addVertex(0,10);
p3.setSubtype(subtype);
p3.add(ts);
// Index the store
AGIndexAllTriples.indexAllTriplesWithTiming(ts);
// Show all triples in the store
TriplesIterator cc = ts.getStatements(null,null,null);
AGUtils.showTriples("All triples:",cc);
// Query to determine whether a point is inside the polygons
System.out.println("Is the point (5,5) inside p1? " + p1.pointInside(5,5));
System.out.println("Is the point (5,5) inside p2? " + p2.pointInside(5,5));
System.out.println("Is the point (5,5) inside p3? " + p3.pointInside(5,5));
System.out.println("Is the point (0.5,0.5) inside p3? " + p3.pointInside(0.5,0.5));
// Close the store and disconnect from the server.
ts.closeTripleStore();
ags.disable();
}
}
`

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