mapstyler_style #

Core types for cartographic styling — compatible with the GeoStyler JSON format.

Part of the mapstyler ecosystem.

Features #

• Style / Rule / ScaleDenominator — top-level style structure with zoom-level control.
• Symbolizers — Fill, Line, Mark, Icon, Text, Raster.
• Filters — Comparison, Combination, Negation, Spatial, Distance (OGC extension).
• Expressions — Literal values and GeoStyler functions (math, string, boolean, case/step/interpolate).
• Geometry model — Point, LineString, Polygon, Envelope for spatial filters.
• StyleParser interface — common contract for format-specific parsers.

Pure Dart — no Flutter dependency. Usable in Flutter apps, CLI tools, and server applications.

Usage #

import 'package:mapstyler_style/mapstyler_style.dart';

final style = Style.fromJson({
  'name': 'Land use',
  'rules': [
    {
      'name': 'Residential',
      'filter': ['==', 'landuse', 'residential'],
      'symbolizers': [
        {'kind': 'Fill', 'color': '#ffcc00', 'opacity': 0.5},
      ],
    },
  ],
});

for (final rule in style.rules) {
  print('${rule.name}: ${rule.symbolizers.length} symbolizer(s)');
}

License #

BSD-2-Clause — see LICENSE.