About Drawing Parts - Examples and Considerations

There are multiple ways to use parts when drawing polygons.

The following example starts with drawing a large polygon and then specifying different areas within it:
  • Draw a large polygon that encompasses the entire service area.

    This polygon can be used for rules that allow travel anywhere within the service area.

  • Draw an island to remove a section from the polygon.

    This represents an area where you cannot provide service.

  • Draw smaller polygons within the large polygon to represent specific regions within the service area.

    Polygon parts need not be contiguous. You should use multiple parts in one polygon only if all parts are subject to the same rules. For example, a polygon with three parts must be linked to the same rules within the polygon.

Important Considerations for Drawing Polygons

When drawing polygons, you can start by drawing a large general shape. Then, zoom in and add vertices to draw around corners and angles. When you have drawn a closed polygon (that is, all the polygon vertices meet), it is advisable to save the polygon before drawing other parts or adjusting the polygon.

Booking trips to or from an address that is not within a polygon can cause violations. When drawing polygons, it is good practice to zoom to the lowest level to ensure that you include the appropriate streets. In the following example, note that Elberta St. is included in the polygon (outlined in purple), but only some of Grandview Ave. is included.
A polygon is visible on a map. It surrounds all of Elberta St., but only part of Grandview Ave.

Overlapping polygons can cause problems with some rules. Turn on appropriate map layers to help you identify locations and borders of existing polygons. In addition, make sure that polygons have styles and colors that help you distinguish them on the map.