topic Re: Error when calculating service areas in ArcGIS Network Analyst Questions

Error when calculating service areas

JohnSanderson — Wed, 13 Oct 2010 19:45:57 GMT

Hi,

I am trying to calculate relatively small service areas (1000 feet) around the centroids of blocks in a city. I have about 10k centroids for which I'd like service areas.

I am only able to generate service areas for some of the points and get the following error message for the others:

"The delay impedance of "Location X" in "Facilities" exceeds the cutoff impedance."

Any idea why I'm getting this?

Thanks in advance!

Re: Error when calculating service areas

JaySandhu — Thu, 14 Oct 2010 15:00:22 GMT

Looks like you must have loaded some "delay" value when you did the load locations. Most likely you had a field that mapped automatically to the attr_"length" field. Open up the attribute table for the facilities and see what values are listed for this field. If it is not 0.0 then use a field calculator and calc them to 0.0

For more information on delay, see the topic for Attr_[Impedance] at:
http://help.arcgis.com/en/arcgisdesktop/10.0/help/index.html#/Service_area_analysis/004700000048000000/

Jay Sandhu

Re: Error when calculating service areas

JohnSanderson — Wed, 27 Oct 2010 20:13:14 GMT

Thanks, Jay! That's exactly what the problem was. Much appreciated.