topic Re: Finding distance between two points in ArcGIS REST APIs and Services Questions

Finding distance between two points

roshnibasu — Thu, 18 May 2017 05:26:41 GMT

Hi,

I am trying to find distance between two points using the following API.

http://route.arcgis.com/arcgis/rest/services/World/Route/NAServer/Route_World/solve?token=[mytoken]&stops=135.700000,35.…

I'm getting below error :

{"error":{"code":400,"message":"Unable to complete operation.","details":["The input points are not all located within a single region."]}}

Please let me know how to resolve this.

Re: Finding distance between two points

RandyBurton — Mon, 22 May 2017 19:15:39 GMT

I believe your longitude and latitude pairs are in the ocean and not in North America. Also longitude should be negative for NA.

Re: Finding distance between two points

JoshuaBixby — Mon, 22 May 2017 20:05:43 GMT

I believe both sets of coordinates are in Japan, which would be positive longitude as specified. Only 1 pair in Japan.

Re: Finding distance between two points

RandyBurton — Mon, 22 May 2017 20:16:14 GMT

I was considering that possibility. I thought one might be Japan and the other Poland. If so, this would be between Europe and Japan (and thus between 2 regions). I think the NAServer is just for the North America region.

I believe this service is looking for a driving route between locations. If a straight line distance is desired, using a great circle or Dan Patterson‌'s Vincenty calculator would be an easier solution.

Re: Finding distance between two points

JoshuaBixby — Mon, 22 May 2017 21:13:01 GMT

You are right, I mistyped one of the coordinate pairs. I agree, one is in Japan and the other Poland.

The NAServer doesn't mean North America, although the acronym does line up, I think it is "network analyst" since that is the server that does routing.

Realizing that one point is in Japan and the other Poland, the error message makes a bit more sense. The routing is setup by regions, and there are certain regions that cannot be routed between. For example, if you try to route between a random point in the middle of North America and a random point in South America, you won't be able to route between them.

Re: Finding distance between two points

RandyBurton — Mon, 22 May 2017 21:20:05 GMT

"Network Analyst" makes sense in the URL path. Perhaps our comments will also make sense to the OP.

Re: Finding distance between two points

roshnibasu — Thu, 25 May 2017 04:18:43 GMT

Hi Randy Burton and Joshua,

Thanks for your reply. So to calculate only distance does not ESRI provide any direct API?

Re: Finding distance between two points

JoshuaBixby — Thu, 25 May 2017 13:36:47 GMT

When you say distance, are you thinking/referring to "as a crow flies" or straight line? Since you are using the World Route service, I think commentors assumed you were interested in travel or routed distance.

Re: Finding distance between two points

RandyBurton — Thu, 25 May 2017 23:31:21 GMT

There is this in the REST documentation: Distance. "It reports the 2D Euclidean or geodesic distance between the two geometries."

Re: Finding distance between two points

roshnibasu — Fri, 26 May 2017 08:11:43 GMT

Hi Joshua,

Thanks. Yes I actually want a straight line distance between two latlons.

Re: Finding distance between two points

JoshuaBixby — Fri, 26 May 2017 13:30:17 GMT

As Randy Burton‌ points out, use the Geometry Service and not Network Service. Here is an example URL using the Geometry Service and your coordinates:

http://sampleserver6.arcgisonline.com/arcgis/rest/services/Utilities/Geometry/GeometryServer/distance?sr=4326&geometry1=…