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I'm trying to render a KML layer (with timezones) in Google Maps API v3. The KML layer works fine in 3D (in Google Earth), but when I render it in 2D, the timezone lines that meet at the North Pole are spread out in a really weird way:

Google Maps rendering

Here is the correct rendering in 3D:

Google Earth rendering

How do I get fix that weird spread?

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1 Answer

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In Google Maps, a Mercator projection is used that cuts off around 84 North and South. Try densifying the lines (add vertices) up to where the cut-off is.

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@MrKennedy: Thanks! How do I do that? – Maxim Zaslavsky Jul 29 '11 at 0:14
@Maxim, sorry, no idea! I only use ArcGIS (I work at Esri). In it, I would just edit the data and insert vertices, or maybe look at a densify tool. – mkennedy Jul 29 '11 at 14:16
You can create a polygon that stops at 84 North/South and clip it. Then the lines will not cross. But you will need two kmls one for GE and the other for GMAPS - it's a 3D projection on a 2D flat surface thing causing the issue. – Mapperz♦ Jul 29 '11 at 14:30

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