Index: navit/maptool/osm.c
===================================================================
--- navit/maptool/osm.c	(revision 4601)
+++ navit/maptool/osm.c	(working copy)
@@ -2135,15 +2135,23 @@
 {
 	struct item_bin *ib;
 	while ((ib=read_item(in))) {
-		if(ib->clen>2 && ib->type<type_line) {
-			struct coord *c=(struct coord *)(ib+1);
-			if(ib->clen/2>2) {
-				if(!geom_poly_centroid(c,ib->clen/2,c)) {
+		int count=ib->clen/2;
+		if(count>1 && ib->type<type_line) {
+			struct coord *c=(struct coord *)(ib+1), c1, c2;
+			if(count>2) {
+				if(!geom_poly_centroid(c, count, &c1)) {
 					// we have poly with zero area
 					// Falling back to coordinates of its first vertex...
 					osm_warning("way",item_bin_get_wayid(ib),0,"Broken polygon, area is 0\n");
+				} else {
+					if(geom_poly_point_inside(c, count, &c1)) {
+						c[0]=c1;
+					} else {
+						geom_poly_closest_point(c, count, &c1, &c2);
+						c[0]=c2;
+					}
 				}
-			} else if (ib->clen/2==2) {
+			} else if (count==2) {
 				osm_warning("way",item_bin_get_wayid(ib),0, "Expected polygon, but only two points defined\n");
 				c[0].x=(c[0].x+c[1].x)/2;
 				c[0].y=(c[0].y+c[1].y)/2;
Index: navit/maptool/maptool.h
===================================================================
--- navit/maptool/maptool.h	(revision 4601)
+++ navit/maptool/maptool.h	(working copy)
@@ -145,6 +145,7 @@
 void geom_coord_revert(struct coord *c, int count);
 long long geom_poly_area(struct coord *c, int count);
 int geom_poly_centroid(struct coord *c, int count, struct coord *r);
+int geom_poly_point_inside(struct coord *cp, int count, struct coord *c);
 int geom_poly_closest_point(struct coord *pl, int count, struct coord *p, struct coord *c);
 GList *geom_poly_segments_insert(GList *list, struct geom_poly_segment *first, struct geom_poly_segment *second, struct geom_poly_segment *third);
 void geom_poly_segment_destroy(struct geom_poly_segment *seg);
Index: navit/maptool/geom.c
===================================================================
--- navit/maptool/geom.c	(revision 4601)
+++ navit/maptool/geom.c	(working copy)
@@ -148,7 +148,29 @@
 	return vertex;
 }
 
+/**
+  * Check if point is inside polgone.
+  * @param in *cp array of polygon vertex coordinates
+  * @param in count count of polygon vertexes
+  * @param in *c point coordinates 
+  * @returns 1 - inside, 0 - outside
+  */
+int
+geom_poly_point_inside(struct coord *cp, int count, struct coord *c)
+{
+	int ret=0;
+	struct coord *last=cp+count-1;
+	while (cp < last) {
+		if ((cp[0].y > c->y) != (cp[1].y > c->y) &&
+			c->x < (cp[1].x-cp[0].x)*(c->y-cp[0].y)/(cp[1].y-cp[0].y)+cp[0].x)
+			ret=!ret;
+		cp++;
+	}
+	return ret;
+}
 
+
+
 GList *
 geom_poly_segments_insert(GList *list, struct geom_poly_segment *first, struct geom_poly_segment *second, struct geom_poly_segment *third)
 {
@@ -294,12 +316,7 @@
 	while (in) {
 		struct geom_poly_segment *seg=in->data;
 		cp=seg->first;
-		while (cp < seg->last) {
-			if ((cp[0].y > c->y) != (cp[1].y > c->y) &&
-				c->x < (cp[1].x-cp[0].x)*(c->y-cp[0].y)/(cp[1].y-cp[0].y)+cp[0].x)
-				ret=!ret;
-			cp++;
-		}
+		ret^=geom_poly_point_inside(seg->first, seg->last-seg->first+1, c);
 		in=g_list_next(in);
 	}
 	return ret;