topic Re: Dojo zoom Dijit - simple question in ArcGIS JavaScript Maps SDK Questions

Dojo zoom Dijit - simple question

AdrianMarsden — Thu, 13 Jan 2011 15:15:11 GMT

Hi

I'm looking at the excellent example here - http://blogs.esri.com/Dev/blogs/arcgisserver/archive/2009/05/29/An-easier-way-to-zoom_3A00_-A-Dojo-dijit-that-zooms-to-states-and-counties.aspx

and have what is probably a numpty question - how do i create my own JSON files for areas I want to create a zoom list to?

Cheers
ACM

Re: Dojo zoom Dijit - simple question

derekswingley1 — Thu, 13 Jan 2011 17:35:37 GMT

That's completely up to you. When I originally wrote the dijit, I used some python to read the county and state geometries, grab the extents and write a .json file that could be used easily by a dojo data store. Take a look at the county and state .json files provided in the sample and you'll be able to see the structure.

You should also take a look at another blog post: Custom Objects in dojo.ItemFileReadStore: Using a Type Map.

Re: Dojo zoom Dijit - simple question

AdrianMarsden — Thu, 13 Jan 2011 18:43:44 GMT

cool, as long as I wasn't missing the big red "make shapefile to JSON" button somewhere.

In fact, whilst at home watching an episode of Buffy, I realized how to do it. I have FME, which creates full fat JSON files, with the full geometry in. But I realized if I take yours, convert it, say to a dbf, in FME, see the structure, then make a similar one with the areas I want in, FME should then convert that back to a JSON with just what I want - i think:D Who knows, but I think I can see the light (as it were)

Many thanks

ACM

Re: Dojo zoom Dijit - simple question

derekswingley1 — Thu, 13 Jan 2011 19:04:52 GMT

No problem. You could also paste some of the json in a site like JS Beautifier or JSON Visualization to get an idea of the structure of each JSON file.

Re: Dojo zoom Dijit - simple question

AdrianMarsden — Wed, 19 Jan 2011 15:04:23 GMT

FME 2011 came my way today,with a new format ESRIJSON - one output geometry is "rectangle" running the shapefile with my towns though the "bounds extractor" and to an ESRIJSON format with rectangle geometries, more or less got what I want in one hit.

I need to test it & stuff but it looks perfect 😄

Re: Dojo zoom Dijit - simple question

derekswingley1 — Wed, 19 Jan 2011 16:04:48 GMT

Nice! I'm not an FME user but that sounds like exactly what you need.

Re: Dojo zoom Dijit - simple question

AdrianMarsden — Thu, 20 Jan 2011 14:30:22 GMT

one final question - is the packaged example still around for download - the link on the blog is broken - obviously I can get all the files one at a time.....;)

Re: Dojo zoom Dijit - simple question

derekswingley1 — Thu, 20 Jan 2011 16:08:30 GMT

Since the old resource center was retired, I'm not sure where you can download this anymore. I'm planning to update and post on arcgis.com. Until then, I've attached the file that was previously available on the resource center.

Re: Dojo zoom Dijit - simple question

AdrianMarsden — Mon, 31 Jan 2011 12:34:02 GMT

Many thanks for that - I have it all nicely integrated in my site now - however, I have been using the "compact" version of the API - mainly as the zoom buttons are nice and clear (the default ones just vanish, and I haven't had time to work out how to customize them)

In the past I've been able to work out which bits I needed to include by name when using the compact version, but I can't work it out this time. Any ideas?

Cheers

ACM

Edit - not so important now - I've reverted to full version and changed the slider - still work in progress as I need to tidy up the code a bit http://maps.eastdevon.gov.uk/mapping/shlaa/