Changeset 9662 for src/django_gheat/wlheatmap

Timestamp:

Sep 5, 2011, 3:47:10 PM (13 years ago)

Author:

rick

Message:

Example to reduce the fine grain results if needed.

File:

• src/django_gheat/wlheatmap/tile.py (modified) (2 diffs)

src/django_gheat/wlheatmap/tile.py

@@ -4 +4 @@
 #
 # Rick van der Zwet <info@rickvanderzwet.nl>
+from collections import defaultdict
 from django.core.management import setup_environ
 from django.db.models import Max
@@ -208 +209 @@
   # Limit such that high level zooms does not get the whole database
   metingen = Meting.objects.filter(**filter).order_by('?')[:1000].values_list('latitude', 'longitude', 'signaal')
+
+  # Round numbers example to a less fine grain measurements
+  # d = defaultdict(list)
+  # for lat,lon, signaal in metingen:
+  #   d[(round(lat,5),round(lon,5))].append(signaal)
+
+  # metingen = []
+  # for (lat,lon),signals in d.iteritems():
+  #   metingen.append((lat,lon,max(signals)))
 
   # XXX: Signal is not normalized in the database making it unknown when a