Tag Archives: georss

WFS Simple takes a step forward

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In the OGC meetings last week WFS Simple was presented to the membership as a part of the “OWS4 GeoDSS Mass Market (formerly GeoRSS) IPR” (note this link will only work for OGC members for a few more days). It was approved as a discussion paper, which is a document that’s worth making public, but is not necessarily an “official” position of the OGC (as a Best Practices paper is).

There were two major areas of discussion at the meeting. One was around whether WFS Simple should harmonize with WFS and become the most basic WFS implementation. The other was related to Basic XML Feature Schema (BXFS) as the default output schema for WFS Simple. These are actually related items as the biggest problem with rolling WFS Simple into WFS would be the issue of having GML as a required output format.

Although at first blush it sounds nice to bring this work into an existing service, I agree with the opinions that it should stay separate. GML as a required output format is too important of a foundation of WFS to tinker with. Therefore I propose maintaining the separation and pursuing the following work items leading to a 1.0 specification.

1. keep WFS Simple focussed on being the generic geospatial data query language for mainstream web data formats like Atom+GeoRSS, KML, etc.

2. Componentize the design of the service, so that this is not really one service, but a simple, clear way to design services focussed on a particular data type like Atom+GeoRSS by adding or removing a parameter or two.

3. Re-emphasize the separation from WFS by moving towards a 1.0 specification with a new name, Geodata Query Service

Municipal use of GeoRSS

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Being an urban planner by training, here’s a GeoRSS post that warms the cockles of my heart from Jason Birch. I fought hard for polygon support in GeoRSS with municipalities firmly in mind. Jason seems to be a pretty capable GIS geek, as evidenced by the fact that he’s using FME to generate his feed–he probably has the talent to make this work even if he had to code it by hand.
I originally thought GeoRSS would allow assessing and permitting departments, which are traditionally more MIS shops, to participate in geospatial information architectures without having to use “real” GIS software. I still think that will happen soon, but until then it’s good to at least see the type of data they control–building permits–getting out of the intranet and onto the Web.

The Democratization of GIS is Complete

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The big news of the week was Microsoft Virtual Earth’s announcement of a new version of Live Maps, and Google following days later with a new feature called My Maps. These are both ways, put simply, to do heads-up digitizing in a Web browser!
The importance of this is development is hard to exaggerate. For years the consumer marketplace has done street mapping extremely well. But that was just streets. “Real” GIS folks need to overlay data from various sources, right? Then last year OpenLayers let you have the best of both worlds, overlaying any arbitrary WMS on top of a Google Maps base map. With the merger of OpenLayers and Community Mapbuilder, expect to soon see a Google Maps base map under your choice of WMS and WFS services and/or embedded GML data, styled with SLD and all wrapped up in a nice KML or Context document.
Add to this the ability to create geographic content in your Web browser and access it via a URL, and a very interesting vision of Web-based GIS begins to emerge. It’s a vision that’s very different from the one the GIS conference circuit has been giving us all decade. I could expound on what I think that vision is, but that’s not really important. The most interesting thing I see here is that the architecture is so beautifully loosely-coupled that there is room for everyone’s vision to be realized. One thing I will predict is that the truly interesting time for Geo-startups begins now.

p.s. Does anyone else find it odd that such a major new feature was introduced by two pretty big companies in the same week? Coincidence, or something else? Please Adena get some dirt on this! inaccurate statement, see comments –Raj

Cambridge events getting better

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I updated my Cambridge events geoblog recently. This is a thingy that reads the event listings on Cambridge’s official city web site,
and reformats it into a blog feed. In the process it also attempts to
figure out where the event is happening so you can map it all.

Here’s the raw “geoblog” feed for the last week, and here’s a map
of those events. Please feel free to play with this data stream and
build cool stuff with it. I’d love to see someone build a phone app
that would tell someone what events are going on within a mile of their
location.