134 lines
5.0 KiB
Python
134 lines
5.0 KiB
Python
import logging
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import json
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from django.core.management.base import BaseCommand
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from django.conf import settings
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from django.contrib.gis.geos import GeometryCollection, GEOSGeometry
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from django.contrib.gis.geos import MultiPolygon
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from django.contrib.gis.gdal import DataSource
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from geo.models import Country, Region, Province, City
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logging.basicConfig(
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filename='logs/loadgisdata.log',
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filemode='w',
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format='%(levelname)s:%(message)s',
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level=logging.INFO,
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)
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class Command(BaseCommand):
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help = 'Load GIS data into database'
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def handle(self, *args, **kwargs):
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logging.info('Deleting all instances of Country, Region, Province, City')
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City.objects.all().delete()
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Province.objects.all().delete()
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Region.objects.all().delete()
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Country.objects.all().delete()
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print('Deleted all instances of Country, Region, Province, City')
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ds = DataSource('datasets/gadm36_ESP.gpkg')
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for layer in ds:
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print(f"Layer {layer.name}:\n \
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\t- Layers: {len(layer)}\n \
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\t- Type: {layer.geom_type.name}\n\
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\t- Features: {layer.num_feat}")
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# country instances
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logging.info("loading country instances")
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print('Creating Country instances')
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country_counter = 0
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for feature in ds[0]:
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try:
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# calculate geometry data
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geom = GEOSGeometry(str(feature.geom))
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polygon_list = []
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for polygon in geom:
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polygon_list.append(polygon)
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geom_geos = MultiPolygon(polygon_list)
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# create instance
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name = feature.get('NAME_0')
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if name == 'Spain':
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SPAIN = Country.objects.create(name='España',geo=geom_geos)
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Country.objects.create(name=name,geo=geom_geos)
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country_counter += 1
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logging.info(f"Country instance created for: {name}")
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except Exception as e:
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logging.error(f"[{name}][{type(e)}] {str(e)}")
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# region instances
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logging.info("loading region instances")
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print('Creating Region instances')
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region_counter = 0
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for feature in ds[1]:
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try:
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# calculate geometry data
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geom = GEOSGeometry(str(feature.geom))
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polygon_list = []
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for polygon in geom:
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polygon_list.append(polygon)
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geom_geos = MultiPolygon(polygon_list)
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# get region name
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name = feature.get('NAME_1')
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# create instance
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Region.objects.create(name=name, geo=geom_geos, country=SPAIN)
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region_counter += 1
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logging.info(f"Region instance created for: {name}")
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except Exception as e:
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logging.error(f"[{name}][{type(e)}] {str(e)}")
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# province instances
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logging.info("loading province instances")
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print('Creating Province instances')
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province_counter = 0
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for feature in ds[2]:
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try:
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# calculate geometry data
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geom = GEOSGeometry(str(feature.geom))
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polygon_list = []
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for polygon in geom:
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polygon_list.append(polygon)
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geom_geos = MultiPolygon(polygon_list)
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# get name and parent
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name = feature.get('NAME_2')
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parent_region = Region.objects.get(name=feature.get('NAME_1'))
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# create instance
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Province.objects.create(name=name, geo=geom_geos, region=parent_region)
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province_counter += 1
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logging.info(f"Province instance created for: {name}")
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except Exception as e:
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logging.error(f"[{name}][{type(e)}] {str(e)}")
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# city instances
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logging.info("loading city instances")
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print('Creating City instances')
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city_counter = 0
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for feature in ds[4]:
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try:
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# calculate geometry data
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geom = GEOSGeometry(str(feature.geom))
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polygon_list = []
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for polygon in geom:
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polygon_list.append(polygon)
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geom_geos = MultiPolygon(polygon_list)
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# get name and parent
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name = feature.get('NAME_3')
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parent_province = Province.objects.get(name=feature.get('NAME_2'))
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City.objects.create(name=name, geo=geom_geos, province=parent_province)
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city_counter += 1
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logging.debug(f"City instance created for: {name}")
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except Exception as e:
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logging.error(f"[{type(e)}] {str(e)}")
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logging.info(f"Country instances created: {country_counter}")
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logging.info(f"Region instances created: {region_counter}")
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logging.info(f"Province instances created: {province_counter}")
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logging.info(f"City instances created: {city_counter}")
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