Martin Milesich

Recently, I have been playing with Google Maps API at my work. With the API I created a polyline but it disappears on random fashion at different zoom levels. It tooks me days to figure it out why. The main problem was I used numeric strings (i.e. numbers in quotes).

Check this examples:

new GPolyline.fromEncoded({
  color: "#0000ff",
  weight: "4",
  opacity: "0.8",
  points: "_gkxEv}|vNM]",
  levels: "PP",
  zoomFactor: "2",
  numLevels: "18"
});

new GPolyline.fromEncoded({
  color: "#0000ff",
  weight: 4,
  opacity: 0.8,
  points: "_gkxEv}|vNM]",
  levels: "PP",
  zoomFactor: 2,
  numLevels: 18
});

They look the same but the first one has numeric strings. I did some testing and value of the weight attribute is important!

If the value of the weight attribute is numeric string your polylines will randomly disappear.

I didn't know that this can be so different.

I want to share my experience with you and make a note to my self.