Generation of map fails when using a filter

[gevatter]

I use a simple json file:

{
  "layers": {
    "rrance": {
       "src": "ne_50m_admin_0_countries.shp",
       "filter": { "ISO3": "FRA" }
    }
  }
}

When starting kartograph I only get a trace, but no error message.

Output:

user@python:~/kartograph-test$ kartograph world.json -o world.svg
  cli.py, in render_map()
  71: K.generate(cfg, args.output, preview=args.preview, format=format, stylesheet=css)  kartograph.py, in generate()
  46: _map = Map(opts, self.layerCache, format=format)  map.py, in __init__()
  48: me.proj = me._init_projection()  map.py, in _init_projection()
  88: map_center = self.__get_map_center()  map.py, in __get_map_center()
  140: features = self._get_bounding_geometry()  map.py, in _get_bounding_geometry()
  257: charset=layer.options['charset']  layersource/shplayer.py, in get_features()
  96: if filter is None or filter(drec):  map.py, in <lambda>()
  252: filter = lambda rec: layerFilter(rec) and boundsFilter(rec)  map.py, in <lambda>()
  239: layerFilter = lambda rec: filter_record(layer.options['filter'], rec)  filter.py, in filter_record()
  25: res = res and filter_record([key, '=', filt[key]], record)  filter.py, in filter_record()
  27: res = filter_single(filt, record)  filter.py, in filter_single()
  35: prop = record[key]
u'ISO3'user@python:~/kartograph-test$

When deleting the line containing the filter option everything wors fine and I get a svg file.

I installed it on a fresh Debian 7.3, python is version 2.7.3. I followed this instructions: http://kartograph.org/docs/kartograph.py/install-ubuntu.html

[webbird]

Seems you use a naturalearth shape. There is no ISO3 attribute in these shape files. Two options:

1. Use "adm0_a3" instead in your filter

2. Map the attribute name to the name you like (in your layer properties):

   "attributes": {
   "adm0_a3": "ISO3"
   }