topic Re: Model Builder Variables in Geoprocessing Questions

Model Builder Variables

ABSARASGHAR — Fri, 17 May 2013 05:34:39 GMT

Hello everyone,
I want to have details about all variables used in model builder. Is there any website link?
Actually I want to understand the basic concept that how I can use "select layer by attribute" as model parameter.
I want to use start date and end date as my model parameter.

Thanking in advance

Re: Model Builder Variables

DaleHoneycutt — Fri, 17 May 2013 14:25:49 GMT

Start with the product documentation. See A Quick Tour of Modelbuilder. This is a topic in the help system. You'll find tutorials there and some good overview topics. The specific topics on variables are Creating a stand-alone variable and Exposing tool parameters as model variables.

Re: Model Builder Variables

EjayLai — Fri, 17 May 2013 17:26:22 GMT

There are two videos available as well:

ModelBuilder - Getting Started

http://video.esri.com/watch/1817/modelbuilder-_dash_-getting-started

Building Tools with ModelBuilder
http://video.esri.com/watch/1820/building-tools-with-modelbuilder

Re: Model Builder Variables

ABSARASGHAR — Fri, 17 May 2013 18:23:32 GMT

Thanks............ These videos seem to be very helpful. But have you created any parameter for start date and end date? If you could guide me in that regard.

Re: Model Builder Variables

EjayLai — Fri, 17 May 2013 19:06:31 GMT

Thanks............ These videos seem to be very helpful. But have you created any parameter for start date and end date? If you could guide me in that regard.

It sounds like you are looking for the for loop, e.g. for it meets a condition such as date range then run....

I guess you can give the details of your needs so that others can jump in to help.

Re: Model Builder Variables

ABSARASGHAR — Fri, 17 May 2013 19:22:42 GMT

Actually I want to "select data by attribute" and then the further analysis on that and my attribute is date here. I want to create two date variables as model parameters. One for Start date and one for End date just to select a range of date from which my data should be selected.

Re: Model Builder Variables

EjayLai — Fri, 17 May 2013 19:30:45 GMT

The Select tool may work for you as it gives you the option to add SQL expressions.

Re: Model Builder Variables

DaleHoneycutt — Fri, 17 May 2013 19:42:27 GMT

It sounds like you want to use variable substitution. This is a common case -- have the user enter some data and then build a query based on the data the user enters. In this case, it's a couple of dates.

I'm going to refer you to a couple of help topics.

First, look at the Quick Tour about variable substitution.

Then there is a topic that shows many examples. Examples 3 and 4 show building a query based on variable substitution.