Saving Label Expressions

Using the database querying label expressions I wrote about on Thursday, I got to learn a new "feature" of ArcGIS today: Disappearing label expressions on modification of a definition query

That's right, spend five minutes building a database query into your label expression, get it working perfectly and then to celebrate try limiting it with a definition query. Bam! No more label expression. Ain't ArcGIS beautiful?

In dealing with this "feature", I discovered ArcGIS has the ability to Save and Load label expressions.

I'm quickly developing a catalog of label expressions.

Comments

ArcGIS One-to-Many Labeling

ArcGIS is just plain lousy at dealing with any relationship that isn't one-to-one. We all have a slew of hacks just to deal with this limitation. I for one regularly am creating temporary cross-tab queries so I can represent multiple sample results at a collection point, fish surveyed at a cross-section and a host of other relationships. The classic example for mapping comes from the cadastral community and condominium lots. It's an odd situation where more than one person has title to the same piece of ground. How do you represent this? I've got a new trick thanks to Mohammed Hoque's article in ArcUser Magazine. We're going to do a database query inside a label expression, loop through the results and output the entire list to label. For our example we'll use Outfitting Areas in Idaho and we'll label them with the Outfitters and Guide License Numbers and Outfitter Names. 1.) Open ArcGIS and add your spatial layer with the unique identifier shared with...

Simple HTTP Redirect with Querystring in IIS7

HTTP Redirect seems simple enough. Always was in IIS6 and in IIS7 there's even a button labeled HTTP Redirect that promises relative redirects. It looks like it'll be as easy Apache finally. That is until you try to redirect a querystring. Then everything bombs. Turns out it still is relatively easy, except you have to know that Microsoft changed $S$Q to $V$Q. Why? $Ss and $Gs I suspect. And How. In our example we'll redirect all pages under http://olddomain.com/content to http://mydomain.com/content. Pick the virtual directory you want to redirect. e.g. http://olddomain.com/content Click HTTP Redirect under IIS in the IIS management console. In the HTTP Redirect Dialog: Check Redirect requests to this destination Enter your new path ending with $V$Q. e.g. http://mydomain.com$V$Q Counter-intuitively check Redirect all request to exact destination (instead of relative destination) Choose the appropriate Status Code (Permanent or Temp...

Simple Record-Level Auditing in SQL Server & ArcSDE

I've had simple auditing set up in my databases for years thanks to our old DBA. This is not robust transaction logging, it just answers the questions "Who created this?", "When was this created?", "Who last edited this?" and "When was this last edited?". After witnessing a brand new table audit itself without triggers, I set about to understand the setup. This seemed curious to me, so I thought it might also be curious to you. It turned out to be a two step system which rendered my insert triggers superfluous (at least I think so, tell me if I'm missing something and I need insert triggers after all). Our solution uses a combination of two methods. For inserts we are going to tie our audit fields to User Defined Data Types which inherit Defaults we have specified. For updates we will build a trigger to log the changes. We will use the following fields in our tables to track inserts and updates: AUD_NUser - Creator AUD_NDate - Creati...

oneidía

Search This Blog