Symbol selection is currently very crude and without preview.

When this is changed additional symbols as those used for openstreetmap-carto can be added.

Mapnik cannot make use of SVGs with <use/> to my knowledge. This is annoying, but unlikely to change by 3.0 release. A mode to generate a SVG without would be useful.

This does not matter with currently released versions of Mapnik, which do not support SVGs for polygon-patterns at all, and the output of this tool is extremely unlikely to be used with a point symbolizer.

Please add a fish symbol to the list of available shapes. This would be helpful for gravitystorm/openstreetmap-carto#1774.

Currently generate button is described as

This should be done before any of the other buttons is used.

It seems that ‣/∇/☐ buttons also may be used as the first one.

I have no good idea how to improve it (that is why this is issue rather than PR).

BTW, thanks for this tool!

When loading a symbol offsets are calculated automatically based on the symbol bounding box. This however does not work together with pixel aligned rendering at the moment - you need to manually specify the correct offset to get proper pixel aligned rendering for most symbols.

Currently I’m playing around with svg_pattern.sh to clip an SVG pattern. The very same pattern has to be clipped to various sizes. It seems like the most slow part is sanitizing, and not clipping. I would like to sanitze only once the SVG pattern. And later clip/cut various sizes of this pattern. Currently I always run svg_pattern.sh with the hole sanitizing process. Would it be possible to clip a pattern without sanitizing? In a separate script? Or add an option to svg_pattern.sh to run it without the sanitizing?

should be self explaining.

The web version supports multiple pattern sizes, but I don't see support for this in the codebase

I am trying to run the svg_pattern.sh, but it generates a lot of errors.

inkscape -g --verb EditSelectAll --verb SelectionUnGroup --verb EditSelectAll --verb SelectionUnGroup --verb EditSelectAll --verb SelectionUnGroup --verb EditSelectAll --verb SelectionUnGroup --verb EditSelectAll --verb ObjectToPath --verb EditSelectAll --verb SelectionCombine --verb FileSave --verb FileClose --verb FileQuit frai.svg
Shortcut::add_shortcut: duplicate shortcut found for: <Primary>comma  Old: SelectionShrinkHalve  New: DialogPreferences !

...

./svg_pattern.sh: line 66: 66238 Segmentation fault: 11  inkscape -g --verb EditSelectAll --verb SelectionIntersect --verb FileSave --verb FileClose --verb FileQuit "$TARGET"

# and now we add this again as a workaround for Mapnik's senseless auto-centering
sed -i -e "s?<desc?<rect width=\"$SIZE\" height=\"$CLIP\" rx=\"0\" x=\"0\" y=\"0\" id=\"rect8566\" style=\"fill:none;fill-opacity:1;stroke:none\" /><desc?" "$TARGET"
+ sed -i -e 's?<desc?<rect width="1296" height="1296" rx="0" x="0" y="0" id="rect8566" style="fill:none;fill-opacity:1;stroke:none" /><desc?' frai.svg

inkscape -z --vacuum-defs -l "$TARGET" -f "$TARGET"
+ inkscape -z --vacuum-defs -l frai.svg -f frai.svg
Warning: Option --without-gui= is deprecated
Unknown option -f

To reproduce:

• open a new window with https://imagico.de/map/jsdotpattern.php
• generate a random dot pattern
• click render to see the pattern with the default tree symbol
• select an additional symbol with the + button, it will deselect the "use" indicator at the default symbol
• render the pattern now with 2 symbols, looks good!
• deselect the default symbol by clicking the + button, now only your second symbol is selected
• render the pattern again: it will be only using the default tree symbol, and not the selected symbol

This also happens if you select the "use" button on any symbol and add other symbols. When you remove the previously "use"d symbol, the whole pattern switches back to the default tree.

http://www.imagico.de/map/jsdotpattern.php#x,512,jdp6894; correctly sets image size to 512 but in "pattern size:" panel 256 is still marked as active.

Similarly http://www.imagico.de/map/jsdotpattern.php#x,128,jdp49994; or http://www.imagico.de/map/jsdotpattern.php#x,1024,jdp89182; are affected in the same way.

Firefox 39 on Lubuntu 14.04, tested with all add-ons disabled.