diff --git a/libs/lua-math-polygon/Makefile b/libs/lua-math-polygon/Makefile
new file mode 100644
index 0000000..57513b6
--- /dev/null
+++ b/libs/lua-math-polygon/Makefile
@@ -0,0 +1,22 @@
+include $(TOPDIR)/rules.mk
+
+PKG_NAME:=lua-math-polygon
+PKG_VERSION:=1
+
+include $(INCLUDE_DIR)/package.mk
+
+define Package/lua-math-polygon
+	SECTION:=libs
+	CATEGORY:=Libraries
+	TITLE:=Polygon math library can also convert 2 point rectangles into polygons
+endef
+
+define Build/Compile
+endef
+
+define Package/lua-math-polygon/install
+	$(INSTALL_DIR) $(1)/usr/lib/lua
+	$(INSTALL_DATA) src/math-polygon.lua $(1)/usr/lib/lua/
+endef
+
+$(eval $(call BuildPackage,lua-math-polygon))
diff --git a/libs/lua-math-polygon/src/math-polygon.lua b/libs/lua-math-polygon/src/math-polygon.lua
new file mode 100644
index 0000000..7a43a9c
--- /dev/null
+++ b/libs/lua-math-polygon/src/math-polygon.lua
@@ -0,0 +1,66 @@
+local M = {}
+
+-- Source with pseudocode: https://de.wikipedia.org/wiki/Punkt-in-Polygon-Test_nach_Jordan
+-- see also https://en.wikipedia.org/wiki/Point_in_polygon
+-- parameters: points A = (x_a, y_a), B = (x_b, y_b), C = (x_c, y_c)
+-- return value: −1 if the ray from A to the right bisects the edge [BC] (the lower vortex of [BC]
+-- is not seen as part of [BC]);
+--                0 if A is on [BC];
+--                +1 else
+function M.cross_prod_test(x_a, y_a, x_b, y_b, x_c, y_c)
+	if y_a == y_b and y_b == y_c then
+		if (x_b <= x_a and x_a <= x_c) or (x_c <= x_a and x_a <= x_b) then
+			return 0
+		end
+		return 1
+	end
+	if not (y_a == y_b and x_a == x_b) then
+		if y_b > y_c then
+			-- swap b and c
+			local h = x_b
+			x_b = x_c
+			x_c = h
+			h = y_b
+			y_b = y_c
+			y_c = h
+		end
+		if y_a <= y_b or y_a > y_c then
+			return 1
+		end
+		local delta = (x_b-x_a) * (y_c-y_a) - (y_b-y_a) * (x_c-x_a)
+		if delta > 0 then
+			return 1
+		end
+		if delta < 0 then
+			return -1
+		end
+	end
+	return 0
+end
+
+-- Source with pseudocode: https://de.wikipedia.org/wiki/Punkt-in-Polygon-Test_nach_Jordan
+-- see also: https://en.wikipedia.org/wiki/Point_in_polygon
+-- let P be a 2D Polygon and Q a 2D Point
+-- return value:  +1 if Q within P;
+--                −1 if Q outside of P;
+--                0 if Q on an edge of P
+function M.point_in_polygon(poly, point)
+	local t = -1
+	for i=1, #poly-1 do
+		t = t * M.cross_prod_test(point.lon, point.lat, poly[i].lon, poly[i].lat, poly[i+1].lon, poly[i+1].lat)
+		if t == 0 then break end
+	end
+	return t
+end
+
+-- Convert rectangle defined by two point into polygon
+function M.two_point_rec_to_poly(rec)
+	return {
+		rec[1],
+		{ lon = rec[2].lon, lat = rec[1].lat },
+		rec[2],
+		{ lon = rec[1].lon, lat = rec[2].lat },
+	}
+end
+
+return M