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Service area facility points issue in

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03-21-2022 07:45 PM
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usama_m
New Contributor

Hi All,

I am doing service area analysis in ArcGIS pro. when I import the Facilities points into the network and run some facilities doesn't produce any polygon. Also, my points are exactly at the nodes on the streets but the yellow points are slightly away from the network (I don't know why such behavior). 

 

Moreover, I have polygon features like parks and supermarkets how can I compute their areas? If I convert them to the point feature, it is not connected with the network.

 

Thank you for your time and consideration and apologies for any stupid question being a beginner. 

usama_m_0-1647916786622.png

 

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JaySandhu
Esri Regular Contributor

The input facility locations are snapped on to the closest place on an edge. So the "yellow points", I am assuming these are the facility locations after being loaded into a service area layer may be different then where your original points were. You mention that all your points are at nodes of streets. Are you using your own network dataset (same streets as where these should be nodes)? In that case they should locate at the same location.

If some facilities do not generate polygons then it could be because the underlying streets are restricted or some other connectivity issue. You can use the Explore Network tool to check connectivity and attributes of the underlying network dataset.

Polygons need to be converted to one or more points before being used in Service Area solver. Generally you could use the centroid or you could place a point at the park entrance or you could find the locations where the park boundary intersects with streets and place multiple points to represent that park.

Jay Sandhu

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JaySandhu
Esri Regular Contributor

The input facility locations are snapped on to the closest place on an edge. So the "yellow points", I am assuming these are the facility locations after being loaded into a service area layer may be different then where your original points were. You mention that all your points are at nodes of streets. Are you using your own network dataset (same streets as where these should be nodes)? In that case they should locate at the same location.

If some facilities do not generate polygons then it could be because the underlying streets are restricted or some other connectivity issue. You can use the Explore Network tool to check connectivity and attributes of the underlying network dataset.

Polygons need to be converted to one or more points before being used in Service Area solver. Generally you could use the centroid or you could place a point at the park entrance or you could find the locations where the park boundary intersects with streets and place multiple points to represent that park.

Jay Sandhu

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usama_m
New Contributor

Thank you for your response. Yes, I created my own network dataset after importing OSM street networks.

I can't find  Explore Network tool in my ArcGIS pro.

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JaySandhu
Esri Regular Contributor

The explore network capability was added in Pro 2.9. Read more here:

Explore Network—ArcGIS Pro | Documentation

With OSM data, one thing to watch out is the connectivity policy of the network dataset. Usually it should be AnyVertex instead of the default Endpoint connectivity.

Jay Sandhu

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