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use polylabel for address point from polygon #12

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use polylabel for address point from polygon #12

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9 changes: 6 additions & 3 deletions openaddr/conform.py
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Original file line number Diff line number Diff line change
Expand Up @@ -22,6 +22,8 @@
from .sample import sample_geojson, stream_geojson

from osgeo import ogr, osr, gdal
from shapely.wkt import loads
from shapely.ops import polylabel
ogr.UseExceptions()

def gdal_error_handler(err_class, err_num, err_msg):
Expand Down Expand Up @@ -728,15 +730,16 @@ def ogr_source_to_csv(source_config, source_path, dest_path):
if source_config.layer == "addresses":
# For Addresses - Calculate the centroid on surface of the geometry and write it as X and Y columns
try:
centroid = geom.PointOnSurface()
shapely_geom = loads(geom.ExportToWkt())
centroid_wkt = polylabel(shapely_geom).wkt
except RuntimeError as e:
if 'Invalid number of points in LinearRing found' not in str(e):
raise
xmin, xmax, ymin, ymax = geom.GetEnvelope()

centroid = ogr.CreateGeometryFromWkt("POINT ({} {})".format(xmin/2 + xmax/2, ymin/2 + ymax/2))
centroid_wkt = "POINT ({} {})".format(xmin/2 + xmax/2, ymin/2 + ymax/2)

row[GEOM_FIELDNAME] = centroid.ExportToWkt()
row[GEOM_FIELDNAME] = centroid_wkt
else:
row[GEOM_FIELDNAME] = geom.ExportToWkt()
else:
Expand Down