Geometry must be a shapely Polygon or MultiPolygon #11
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This is working correctly. If you get the geometry for Povo, Italy:
OpenStreetMap returns a point:
If you have logging turned on, it issues a warning: "OSM returned a Point as the geometry." You can see this directly from the API -- looks like OSM doesn't have a polygon for this place, only a centroid point. The geocoder warns you that it got a point back, and when graph_from_polygon receives the point geometry, it throws the exception you saw: the geometry has to be a Polygon or MultiPolygon to run graph_from_polygon. See also: #16 |
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A related query: I can get a point gdf for a city without a polygon (like "Povo, Italy" in the example above), but this doesn't seem to work as an input to "graph_from_point" for either "distance_type |
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Your code snippet is almost there. If you check out the docstring for So, you just need to extract the point as a (lat, lon) tuple from the GeoDataFrame, like this: |
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FWIW, you can also get the network within n meters of the center_point along the network (rather than by constructing a bounding box around your center_point), like this: |
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import osmnx as ox this is giving me an error of LinearRing |
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I'd check your operations and rerun it again, it's working for me: |
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@yujinh this is likewise all working fine in my test environments. Can you provide your full package list and environment info (ie, what OS, what python version, etc)? |
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macOS Sierra version 10.12.6 |
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Hello! #Calculate basic street network measures (topological and metric) get the network for Piedmont, calculate its basic stats, then show the average circuitystats = ox.basic_stats(ox.graph_from_address('11.568271,104.9224426')) get the street network for a place, and its area in square metersplace = 'Phnom Penh, Cambodia' calculate basic and extended network stats, merge them together, and displaystats = ox.basic_stats(G, area=area) ZeroDivisionError Traceback (most recent call last) c:\anaconda3\envs\osmnx\lib\site-packages\osmnx\stats.py in basic_stats(G, area, clean_intersects, tolerance, circuity_dist) ZeroDivisionError: float division by zero I am a beginner of python and osmnx. Any advice, please? I really appreciate! |
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Hi, @gboeing thank you for osmnx package! It is really good to use it. I had similar issue arising from "non-polygons" objects, e.g. "Povo, Italy".
coords = [(24.950899, 60.169158), (24.953492, 60.169158), (24.953510, 60.170104), (24.950958, 60.169990)] #working example But then I cannot search for amenities in the Polygon for some reason. e.g. I try
Thank you! |
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@Liyubov if you provide a minimal, complete, reproducible example I will take a look. |
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Yes, tnx, sure, here it is @gboeing Hope this is clear. Thank you! `import networkx as nx Create a Polygoncoords = [(24.950899, 60.169158), (24.953492, 60.169158), (24.953510, 60.170104), (24.950958, 60.169990)] hospitals = ox.pois.osm_poi_download(polygon=poly, amenities=['hospital']) How many hospitals do we have in this district?print('number of hospitals',len(hospitals)) ` |
I'm sorry, I always show you errrors :(
which result is:
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