Beispiel #1
0
def getNeighborhoodsByAreas(conn, areaids, user):
  print 'getting votes'
  (blocks, allVotes) = vote_utils.getVotes(conn, areaids, user)
  print 'got votes'

  blocks_by_hoodid = defaultdict(list)
  id_to_label = {}

  for block in blocks:
    votes = allVotes[block['geoid10']]
    #print block['geoid10']
    maxVotes = vote_utils.pickBestVotes(votes)
    for maxVote in maxVotes:
      blocks_by_hoodid[maxVote['id']].append(block)
      id_to_label[maxVote['id']] = maxVote['label']

  hoods = {}
  print 'doing unions'
  for (id, blocks) in blocks_by_hoodid.iteritems():
    geoms = [asShape(eval(block['geojson_geom'])) for block in blocks]
    blockids = [block['geoid10'] for block in blocks]
    pop10 = sum([block['pop10'] for block in blocks])
    housing10 = sum([block['housing10'] for block in blocks])

    geom = cascaded_union(geoms)
    hoods[id] = NeighborhoodArea(geom, blockids, pop10, housing10)
  return (hoods, id_to_label)
Beispiel #2
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def getNeighborhoodsByAreas(conn, areaids, user):
    print 'getting votes'
    (blocks, allVotes) = vote_utils.getVotes(conn, areaids, user)
    print 'got votes'

    blocks_by_hoodid = defaultdict(list)
    id_to_label = {}

    for block in blocks:
        votes = allVotes[block['geoid10']]
        #print block['geoid10']
        maxVotes = vote_utils.pickBestVotes(votes)
        for maxVote in maxVotes:
            blocks_by_hoodid[maxVote['id']].append(block)
            id_to_label[maxVote['id']] = maxVote['label']

    hoods = {}
    print 'doing unions'
    for (id, blocks) in blocks_by_hoodid.iteritems():
        geoms = [asShape(eval(block['geojson_geom'])) for block in blocks]
        blockids = [block['geoid10'] for block in blocks]
        pop10 = sum([block['pop10'] for block in blocks])
        housing10 = sum([block['housing10'] for block in blocks])

        geom = cascaded_union(geoms)
        hoods[id] = NeighborhoodArea(geom, blockids, pop10, housing10)
    return (hoods, id_to_label)
Beispiel #3
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def citydata():
  conn = psycopg2.connect("dbname='gis' user='******' host='localhost' password='******'")
  areaid = request.args.get('areaid', False)
  apikey = request.args.get('key', '')

  user = findUserByApiKey(apikey)
  (rows, votes) = vote_utils.getVotes(conn, areaid, user)

  response = {
    "type": "FeatureCollection",
    "features": makeFeatures(rows, votes, user)
  }

  return jsonify(response)
Beispiel #4
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def citydata():
  conn = getPostgresConnection()
  areaid = request.args.get('areaid', False)
  apikey = request.args.get('key', '')

  user = findUserByApiKey(conn, apikey)
  (rows, votes) = vote_utils.getVotes(conn, areaid, user)

  response = {
    "type": "FeatureCollection",
    "features": makeFeatures(rows, votes, user)
  }

  return jsonify(response)
Beispiel #5
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def citydata():
    conn = getPostgresConnection()
    areaid = request.args.get('areaid', False)
    apikey = request.args.get('key', '')

    user = findUserByApiKey(conn, apikey)
    (rows, votes) = vote_utils.getVotes(conn, areaid, user)

    response = {
        "type": "FeatureCollection",
        "features": makeFeatures(rows, votes, user)
    }

    return jsonify(response)
Beispiel #6
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def citydata():
    conn = psycopg2.connect(
        "dbname='gis' user='******' host='localhost' password='******'")
    areaid = request.args.get('areaid', False)
    apikey = request.args.get('key', '')

    user = findUserByApiKey(apikey)
    (rows, votes) = vote_utils.getVotes(conn, areaid, user)

    response = {
        "type": "FeatureCollection",
        "features": makeFeatures(rows, votes, user)
    }

    return jsonify(response)
Beispiel #7
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def getNeighborhoodsByArea(conn, areaid, user):
  (blocks, allVotes) = vote_utils.getVotes(conn, areaid, user)

  blocks_by_hoodid = defaultdict(list)
  blockids_by_hoodid = defaultdict(list)
  id_to_label = {}

  for block in blocks:
    geom = asShape(eval(block['geojson_geom']))
    votes = allVotes[block['geoid10']]
    #print block['geoid10']
    maxVotes = vote_utils.pickBestVotes(votes)
    for maxVote in maxVotes:
      blocks_by_hoodid[maxVote['id']].append(geom)
      blockids_by_hoodid[maxVote['id']].append(block['geoid10'])
      id_to_label[maxVote['id']] = maxVote['label']

  hoods = {}
  for (id, geoms) in blocks_by_hoodid.iteritems():
    hoods[id] = NeighborhoodArea(cascaded_union(geoms), blockids_by_hoodid[id])
  return (hoods, id_to_label)
Beispiel #8
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def getNeighborhoodsByArea(conn, areaid, user):
    (blocks, allVotes) = vote_utils.getVotes(conn, areaid, user)

    blocks_by_hoodid = defaultdict(list)
    blockids_by_hoodid = defaultdict(list)
    id_to_label = {}

    for block in blocks:
        geom = asShape(eval(block['geojson_geom']))
        votes = allVotes[block['geoid10']]
        #print block['geoid10']
        maxVotes = vote_utils.pickBestVotes(votes)
        for maxVote in maxVotes:
            blocks_by_hoodid[maxVote['id']].append(geom)
            blockids_by_hoodid[maxVote['id']].append(block['geoid10'])
            id_to_label[maxVote['id']] = maxVote['label']

    hoods = {}
    for (id, geoms) in blocks_by_hoodid.iteritems():
        hoods[id] = NeighborhoodArea(cascaded_union(geoms),
                                     blockids_by_hoodid[id])
    return (hoods, id_to_label)
Beispiel #9
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def processArea(areaid):
  hoodDict = {}
  (hoods, id_to_label) = geo_utils.getNeighborhoodsByArea(conn, areaid, None)
  for (id, shape) in hoods.iteritems():
    hoodIndex.add(int(id), shape.bounds)
    hoodDict[int(id)] = shape
  
  (rows, voteDict) = vote_utils.getVotes(conn, areaid, None)

  bestVoteDict = {}
  print 'building vote dict'
  for k,v in voteDict.iteritems():
    bestVoteDict[str(k).zfill(15)] = vote_utils.pickBestVote(v) 

  print 'building rtree'
  shapeDict = {}
  for r in rows:
    id = r['geoid10']
    shape = asShape(geojson.loads(r['geojson_geom']))
    shapeDict[id] = shape
    index.add(int(id), shape.bounds)

  print 'smoothin'

  for r in rows:
    id = str(r['geoid10']).zfill(15)
    bestId = None
    if id in bestVoteDict:
      bestId = bestVoteDict[id]['id']
    shape = shapeDict[id]
    # find all the blocks it maybe touches
    candidate_ids = set([n for n in index.intersection(shape.bounds)])
    touches = []
    for cid in candidate_ids:
      if cid != id:
        cshape = shapeDict[str(cid).zfill(15)]
        if shape.touches(cshape):
          touches.append(cid)
    print '%s touches %s' % (id, touches)
    smearDict = defaultdict(lambda: 0)
    totalWithVotes = 0
    for t in touches:
      tid = str(t).zfill(15)
      if tid in bestVoteDict:
        cbestId = bestVoteDict[tid]['id']
        smearDict[cbestId] += 1
        totalWithVotes += 1

    candidate_hood_ids = set([n for n in hoodIndex.intersection(shape.bounds)])
    for hood_id in candidate_hood_ids:
      hoodShape = hoodDict[hood_id]
      if hoodShape.contains(shape):
        print 'block %s was contained by neighborhood %s' % (id, hood_id)
        smearDict[hood_id] += 1000000

    print smearDict
    if len(smearDict) > 0:
      maxVotes = {x for x in itertools.groupby(smearDict.iteritems(), operator.itemgetter(1))}
      maxCount = max(maxVotes.keys())
      isAmbiguous = len(maxVotes[maxCount]) > 1
      maxVote = maxVotes[maxCount][0]
      threshold = totalWithVotes * (5.0/8.0)
      if maxVote[1] >= threshold and (maxVote[0] != bestId or isAmbiguous):
        print 'very likely that block %s should be in %s, is in %s' % (id, maxVote[0], bestId)
        cur.execute("""DELETE FROM votes WHERE source=%s AND id=%s""", ('smear', id))
        cur.execute("""INSERT INTO votes (id, label, count, source) values (%s, %s, %s, 'smear')""", (
            id, maxVote[0], 1))
        conn.commit()