topic Re: Use Attribute Assistant to Populate Field W/ M Value in State & Local Government Questions

Use Attribute Assistant to Populate Field W/ M Value

Anonymous User — Tue, 13 Nov 2012 13:36:27 GMT

Original User: Winsor1

Hello,

I work for a pipeline company & we use Linear Referencing to keep track of our footages. I would like to use Attribute Assistant to automatically populate our BeginStation & EndStation fields in our pipeline feature classes with the min & max m values.
I was thinking of using the Expression value method in Attribute Assistant like I currently do with Field Calculator. As far as I know I can�??t use my Python expression�?�

BEGINSTATION =
        !Shape!.extent.MMin

�?�because the expression must be in VB. I am not sure how or if it is possible to use my old VB Script�?�

Pre-Logic Script Code:
dim m as imcollection
        set m = [shape]
        dim d as double
        d = m.mmin
BEGINSTATION =
        d

Does anyone have any ideas on how to populate a field based on a Linear Referenced features m values?

Thanks!

Winsor1

Re: Use Attribute Assistant to Populate Field W/ M Value

MikeMillerGIS — Wed, 14 Nov 2012 13:54:59 GMT

Matt,
The expression is a pure vb script engine and does not use ArcObjects, so it will not be able to extract the M's from a feature. We currently do not have a method to extract the M's.

Re: Use Attribute Assistant to Populate Field W/ M Value

Anonymous User — Wed, 14 Nov 2012 14:48:55 GMT

Original User: Winsor1

Mike,

Thanks for responding.

Will Python expressions be accepted by Attribute Assistant in the future? If so will �??!Shape!.extent.MMin�?� work?

Matt.

Re: Use Attribute Assistant to Populate Field W/ M Value

MikeMillerGIS — Wed, 14 Nov 2012 14:57:37 GMT

Matt,
It is currently not in the development plan. We could look at letting the expression rule use the Python engine, but I am unsure if it would would with ArcPy.