matching IDs in OD matrices

Discussion created by flillo on Aug 25, 2010
Latest reply on Oct 28, 2010 by bsriramak

Like • Show 0 Likes0
Comment • 3

Hi there,

I'm generating large OD matrices with ArcGIS. My idea is to use the same input file for origins and destinations. However, when I load the destinations, ArcGIS change de ID's. As a result, different IDs are assigned to a same location in the OD matrix. What I need is origins and destination with same IDs to warranty that total OD-distance, for example, from ID 1 to ID 1 is 0.

Any advice about it??

Phil

Outcomes

3 Replies

bsriramak Oct 16, 2010 8:51 AM
Hi,

You could possibly do the OD analysis with whatever ID's and later do a spatial join to bring in the correct ID's. Makes sense ? Because everything in ArcGIS is about coordinates and less about ID's. As long as your geographic locations are correct, you can make your results look as you want with some tricks.

Thanks
Like • Show 0 Likes0
Actions
jsandhu-esristaff Oct 18, 2010 8:23 AM
Hi,

You could possibly do the OD analysis with whatever ID's and later do a spatial join to bring in the correct ID's. Makes sense ? Because everything in ArcGIS is about coordinates and less about ID's. As long as your geographic locations are correct, you can make your results look as you want with some tricks.

Thanks

I am not sure why you say that ArcGIS is about coordinates and less about ID's. I would not recommend spatial joins unless there is no way to carry IDs. But in this case it is quite easy.

There are two ways you can carry your own data with the origins and destinations. When you do a load locations, you can map a common id to the NAME field. In that way both origins and destinatons will have the same Name. The second way to carry IDs (or any other informtion) is to ADD a new field to the origin and destination attribute table and then when you do a load locations, it will be listed in the Property column and you can map your ID from the points to this field.

All that said, I am not sure why your IDs are changing if you load the same set of points. By default, the Object ID goes from 1 to N. So if you load the same set of points as origins and destinations, you will get the same ID assigned to them. Also note that once you load origins, the second time around to load the same set, do not load from the point locations, rather load them from the "origins" and use the "network location fields" and not geometry to load the locations and it will be quite fast.

Regards,
Jay Sandhu
Like • Show 0 Likes0
Actions
bsriramak Oct 28, 2010 8:40 AM
Yes, Jay is right again. Sorry Jay, my english is not good. But I also mean what you say below. The method you suggest adds the layer quickly, I also have experienced that.
Like • Show 0 Likes0
Actions

GeoNet

The Esri Community

matching IDs in OD matrices

Outcomes

Related Content

Recommended Content