Whenever a (large) map is printed and it involves a page break before or in the middle of the map canvas, the first few map tiles on the part of the map pushed to the page following the page break are wrong. Typically, some tiles appear and they are from the geographic neighbourhood of the correct tiles, but are not spot on.

Examples are attached using primarily Chrome printing, but same behaviour is observed in IE 9.0.8, Firefox 5.0.1, Safari 5.1 and Chrome 13.0, however, the issue shows a litte bit different in each browser.

In each of the GMap.Print.Bug.x.pdf files notice the top of the maps following a page break. Also notice that the overlays (markers and polylines) are drawn correctly. Only the tiles are wrong.

The forced page break example is constructed using the css page-break-before property.

It does not occur with the first map, if it fits on the first page, but then only to subsequent maps following page breaks (see GMap.Print.Bug.Chrome.ForcedPageBreak.WholeMap.NoText.pdf).

The file GMap.Print.Correct.Chrome.ForcedPageBreak.iFrames.pdf shows how the maps in the example instance should look (map canvases were placed in separate iframes to force print of each map canvas on independent pages, thereby avoiding the issue).

Lastly, all the pages used in this example look absolutely fine when displayed in browsers. The issue only ever appears when printing.

GMap.Print.Bug.Chrome.AutomaticPageBreak.MidMap.pdf 1.4 MB   Download

GMap.Print.Bug.Chrome.AutomaticPageBreak.WholeMap.pdf 1.4 MB   Download

GMap.Print.Bug.Chrome.ForcedPageBreak.WholeMap.pdf 1.5 MB   Download

GMap.Print.Bug.Firefox.ForcedPageBreak.MidMap.pdf 155 KB   Download

GMap.Print.Bug.IE.ForcedPageBreak.WholeMap.pdf 554 KB   Download

GMap.Print.Correct.Chrome.ForcedPageBreak.iFrames.pdf 1.5 MB   Download

GMap.Print.Bug.Chrome.ForcedPageBreak.WholeMap.NoText.pdf 442 KB   Download