Mario WKT simplificado

catalog/management/commands/GeoJsonToWKT.py

+#!/usr/bin/python
+# -*- coding: utf-8 -*-
+
+from django.core.management.base import BaseCommand, CommandError
+from catalog.models import Polygon
+import json, unicodedata
+from osgeo import ogr
+import math
+
+class Command(BaseCommand):
+
+	def handle(self, *args, **options):
+		pList = Polygon.objects.all()
+
+		for p in pList:
+			j = json.loads(p.json_info)
+			coordinates = j['geometry']['coordinates']
+			areaMax = -1
+			polyMax = None
+			polyPointListMax = None
+			for c in coordinates:
+				poly = ogr.Geometry(ogr.wkbPolygon)
+				ring = ogr.Geometry(ogr.wkbLinearRing)
+
+				delta = int(math.ceil(len(c[0])/75))
+				points = c[0]
+
+				if delta>0:
+
+					pointsTmp = list()
+					for i in range (0, len(points), delta):
+						tmpList = c[0][i:i+delta]
+						x = sum([ pp[0]  for pp in tmpList ] )/ len(tmpList)
+						y = sum([ pp[1]  for pp in tmpList ] )/ len(tmpList)
+						pointsTmp.append([x, y])
+					points = pointsTmp
+
+				for point in points:
+					ring.AddPoint(point[0], point[1])
+
+				poly.AddGeometry(ring)
+
+				if areaMax<poly.Area():
+					areaMax = poly.Area()
+					polyMax = poly
+					polyPointListMax = points
+
+			stringlist = ""
+			for pi in range( len(polyPointListMax) ):
+
+				x = str(polyPointListMax[pi][0])
+				y = str(polyPointListMax[pi][1])
+				stringlist+=x+" "+y+","
+
+
+			x = str(polyPointListMax[0][0])
+			y = str(polyPointListMax[0][1])
+			stringlist+=x+" "+y
+			wkt = "POLYGON(("+ stringlist +"))"
+			p.wkt_polygon = wkt
+			p.save()
+#			print(wkt)
+#			print ("\n\r\n\r")

catalog/management/commands/populate_db.py

@@ -34,4 +34,4 @@ class Command(BaseCommand):
 		# 	print ("_____________________________________________")
 
 	def strip_accents(self, s):
-		return ''.join((c for c in unicodedata.normalize('NFD', s) if unicodedata.category(c) != 'Mn'))
\ No newline at end of file
+		return ''.join((c for c in unicodedata.normalize('NFD', s) if unicodedata.category(c) != 'Mn'))

catalog/migrations/0005_polygon_wkt_polygon.py

+# -*- coding: utf-8 -*-
+# Generated by Django 1.10.7 on 2018-05-26 19:39
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('catalog', '0004_auto_20180522_0751'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='polygon',
+            name='wkt_polygon',
+            field=models.TextField(default=''),
+        ),
+    ]

catalog/models.py

@@ -12,4 +12,5 @@ class Platform(models.Model):
 
 class Polygon(models.Model):
 	name = models.CharField(verbose_name="Polygon Name", max_length=50)
-	json_info = models.TextField(verbose_name="JSON Info", default='')
\ No newline at end of file
+	json_info = models.TextField(verbose_name="JSON Info", default='')
+	wkt_polygon = models.TextField(default='')