diff options
Diffstat (limited to 'chimere/models.py')
| -rw-r--r-- | chimere/models.py | 16 |
1 files changed, 13 insertions, 3 deletions
diff --git a/chimere/models.py b/chimere/models.py index 0fb42fb..fc2dc94 100644 --- a/chimere/models.py +++ b/chimere/models.py @@ -290,6 +290,13 @@ class SubCategory(models.Model): _(u"Minimum zoom for loading details"), blank=True, null=True, help_text=_(u"Optimization when too many data have to be displayed. " u"Currently available only for route and polygon.")) + simplify_tolerance = models.FloatField( + _(u"Simplify tolerance for lower zoom"), blank=True, null=True, + help_text=_(u"Only relevant when Minimum zoom is set. Use the " + u"Douglas-Peucker algorythm to simplify the geometry when " + u"details is not alvailable. Adjust to your data volume " + u"and your performance need. 0.0003 is a good starting " + u"point. Note: typology is not preserved.")) class Meta: ordering = ["category", "order"] @@ -1092,7 +1099,7 @@ class AggregatedPolygon(models.Model): managed = False db_table = 'chimere_aggregated_polygons' - def getGeoJSON(self, simplify=False, color="", inner_color=''): + def getGeoJSON(self, color="", inner_color=''): '''Return a GeoJSON string ''' # get colors @@ -1113,8 +1120,11 @@ class AggregatedPolygon(models.Model): inner_color = c.inner_color geom = self.polygon - if simplify: - geom = self.polygon.simplify(0.0003).json + if self.subcategory.simplify_tolerance: + geom = self.polygon.simplify( + self.subcategory.simplify_tolerance).json + else: + geom = geom.json attributes = { 'color': color, 'geometry': json.loads(geom), 'type': "Feature", "properties": { |