【實用生產應用app】Surveyor's Formula|最夯免費app

Planning to install wood floors, or maybe building a deck, or perhaps re-carpeting your home and you're not sure how much material to buy because you‘re working with an odd shaped area (i.e. a Polygon)? You’re in luck. Calculating the area of an odd shaped area/Polygon is easy with the "Surveyor's Formula” mobile app.

In fact, the Surveyor’s Formula mobile app can be useful for all sorts of projects involving Area Calculations for non self-intersecting Polygons. Simply sketch your Polygon (limit of 24 vertices – a vertices is where two sides meet) onto a sheet of graph paper in order to obtain the X and Y values “coordinates” of each vertices. Enter the total number of vertices into the “Vertices:” field. Then input the "X" and "Y" coordinate of each vertices into its respective column/field. The left-topmost "X" and "Y" coordinate input fields are the first coordinate pair. As you work your way down, enter the 2nd coordinate pair, 3rd, 4th, and so on. Work your way around the polygon's vertices in a counter-clockwise rotation until you've entered all the XY coordinate pairs. Then press the "Calc" button to get the Area of the polygon.

To visualize the Polygon, tap the “Graph Polygon” label at the bottom of the display. Once displayed, the Polygon can be dragged about the screen. Rotate the Polygon with the slider control that appears under the “Graph Polygon” label, after a Polygon has been displayed. You increase the size of the Polygon with a double-tap. Tap and Hold it to decrease it.

Press the “Clear” button to remove all data input and remove the Polygon from the display.

Tip: Sometimes it’s useful to add a zero to each coordinate (i.e. 1 becomes 10, 2 becomes 20, 10 becomes 100, 0 is still 0) so that the Polygon displays 10X larger than it would have to prevent a Polygon display that’s too small to see. Just remember this bumps the area by 10X too, so divide the Area by 10 to correct it.

Enjoy.

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