Re: [OpenLayers-Users] How to read OpenLayers Layer Definitions from file?

[Phil Scadden]

I do this. I have my layer definitions and behaviours in an external 
file, stored as json format. The application fetches the json, and then 
processes it to create the map with all the layers and desired 
behaviour. I have a web application for defining the layers and 
behaviours desired and storing to a json file. (Warning  - a non-trivial 
amount of work).  You can see a resulting map at 
http://data.gns.cri.nz/pbe/ (free registration required). The menu 
contents are also completely defined by a json file. If you look at the 
"interactive maps", you will see from URL, that it just loads different 
json files for each map. This gives me one set of code to create 
multiple web mapping applications. The other advantage is that each 
content and behaviour can have user groups associated with it. This way 
different classes of users (eg internal versus external versus paying 
clients) get to see different things from the same config. The json is 
filtered by user before passing it to OL.

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