maposmatic/www/maposmatic/apis/polygon.py

50 wiersze
1.7 KiB
Python

# coding: utf-8
# maposmatic, the web front-end of the MapOSMatic city map generation system
# Copyright (C) 2023 Hartmut Holzgraefe
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as
# published by the Free Software Foundation, either version 3 of the
# License, or any later version.
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Affero General Public License for more details.
# You should have received a copy of the GNU Affero General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
import logging
LOG = logging.getLogger('maposmatic')
import json
from django.http import HttpResponse, HttpResponseBadRequest
import ocitysmap
import www.settings
from www.maposmatic import helpers, forms, nominatim, models
def api_polygon(request, osm_id):
"""API handler that returns the polygon outline from an OSM ID polygon."""
try:
osm_id = int(osm_id)
except ValueError:
return HttpResponseBadRequest("ERROR: Invalid arguments")
renderer = ocitysmap.OCitySMap(www.settings.OCITYSMAP_CFG_PATH)
try:
bbox_wkt, area_wkt = renderer.get_geographic_info(osm_id)
bbox = ocitysmap.coords.BoundingBox.parse_wkt(bbox_wkt).as_json_bounds()
return HttpResponse(content=json.dumps({'bbox': bbox, 'wkt': area_wkt}),
content_type='text/json')
except:
LOG.exception("Error retrieving polygon outline for OSM ID %d!" % osm_id)
return HttpResponseBadRequest("ERROR: OSM ID %d not found!" % osm_id)