Записки программиста, обо всем и ни о чем. Но, наверное, больше профессионального.

2013-07-22

Displaying Wildfires

Дарю: набор статей, демонстрирующих построение JavaScript веб-карты не простой а золотой использующей слабосвязанные компоненты, конфигурирование (параметризацию) через URL и прочие интересные фишки. Концептуально.

Marionette Maps” is an on-going series on building a loosely coupled, configuration driven map viewer using Marionette.js. Read Part 1Part 2Part 3Part 4 and Part 5.
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Lessons Learned

I learned a couple conceptual level things along the way which I’ll be sure to plan for moving forward. Here they are in no particular order…

Make a List of Events

This app is right at the edge of something that you can keep in your head easily. Moving forward, I’ll be keeping a list of the events and a description of what they are supposed to do in the project.

Plan your Routes

Plan ahead for how you are going to handle the router, and holding the context of the map in the url. When I first added the router, I just stored the center of the map and the zoom level, which was easy to tie into things as the map is all cleanly separated, and it’s easy to raise events from the map and use that to update the url. Adding in the “Year” was troublesome in that the value of the year is set as a result of selecting a historical year to view. Ok, not too bad for updating the url via Router.navigate, but parsing out the values and correctly restoring the map state was more complex than I’d have liked.

Data Consistency

This also came up at the end. I had planned to show another “window” with details about a wildfire, which would be relatively simple – EXCEPT – the attributes for the current fires layer are DIFFERENT from those on the historical fire layers, which borked things up royally as all the rest of the code assumes that all the wildfire layers are the same. This certainly could be worked around, but since no one is paying for this app, I let it ride with a mouse-over that shows the fire name. I have some ideas about how to harvest all the data into a consistent format, hosted on ArcGIS Server 10.1 and then use some of the new Stats options to show interesting info about the data, but that will have to wait for a while.


Если тема интересна, лучше всего начать с предисловия
разъясняющего тему «нафига козе боян зачем нам Backbone.Marionette»



original post http://vasnake.blogspot.com/2013/07/displaying-wildfires.html

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