Walking isochrones going into/over water

openrouteservice
1

Hi! I estimated 15 minute walking isochrones for the NYC Ferry stops and am running into a lot of issues with the water, as you can see:

Screen Shot 2023-10-23 at 8.56.30 PM
Screen Shot 2023-10-23 at 8.56.30 PM1144×1306 192 KB

I’m getting the following error:
Feature ID 114 caused a GenericServerError:
500 ({“error”:{“code”:3099,“message”:“Unable to build an isochrone map.”},“info”:{“engine”:{“build_date”:“2023-07-09T01:31:50Z”,“version”:“7.1.0”},“timestamp”:1698120639190}})

I looked for similar topics and couldn’t find anything, is there any way to resolve this issue? I would understand if the area covered the water just by virtue of the shape of the polygon, but it’s really going out of it’s way to go over the water.

2

Hi @emma,

by default ferries are included for foot- profiles. If you want to disable that you need to avoid ferries in your request.

Best regards

3

Thanks for the reply! What exactly do you mean by avoid ferries though? If any of the isochrones encompasses a ferry stop won’t it then encompass the ferry travel, meaning a huge proportion of walking isochrones can’t be calculated for a city like NYC?

4

You can add "options":{"avoid_features":["ferries"]} to your isochrones query and thus avoid using ferry routes.

5

I’m sorry if this is a dumb question but is that possible in QGIS, or only on the ORS site?

6

Hey,

that’s possible in QGIS as well - it’s only hidden in the Advanced parameters of the processing algorithms.

Best regards

7

thank you so much for your help!

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