This is an old revision of the document!
To draw a line pattern (dotted or dashed), use the pattern attribute to define the line pattern.
The pattern attribute value consists of one or more comma separated double values, this array of numbers specifies the sequence of dash/space/dash/space etc. When finished the sequence repeats itself to the end of the line.
| pattern=“5” | A basic setting that will result in a dashed line where both the dashes and spaces are 5 pixels in size. |
| pattern=“1,2” | A setting that will result in a dotted line where the dashes are 1 pixel in size and the spaces are 2 pixels. |
| pattern=“2,3” | Another dashed line but with small dashes. |
| pattern=“5,5,2,2” | A setting where the first dash is five pixels, then a space of five pixels, then a dash of two pixels, then a space of two pixels, then the sequence starts again. |
The pattern argument is a 16-bit series of 0s and 1s, and it's repeated as necessary to stipple a given line. A 1 indicates that drawing occurs, and 0 that it does not, on a pixel-by-pixel basis, beginning with the low-order bits of the pattern.
<line stipple="16135"> <point lon="E0042957" lat="N0511059"/> <point lon="E0044324" lat="N0510755"/> </line>
where 16135 = 0011111100000111 in binary
With the preceding example and the pattern 16135 (which translates to 0011111100000111 in binary), a line would be drawn with 3 pixels on, then 5 off, 6 on, and 2 off. (If this seems backward, remember that the low-order bits are used first.) If factor had been 2, the pattern would have been elongated: 6 pixels on, 10 off, 12 on, and 4 off.