“Roads to Rome” Project

I got an interesting e-mail the other day informing me about the “Roads to Rome” project. I don’t normally write items that arrive in my inbox, but this had two major hooks for me. First, I used to do a lot of routing analysis earlier in my career. Second, I am a Roman history buff. With these two factors in play, I couldn’t resist.

Image courtesy moovel lab team, Data © OpenStreetMap contributors
Image courtesy moovel lab team, Data © OpenStreetMap contributors

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Simple Tile Viewer

We do a lot of tiles for various customers at Zekiah. Tiling is as much art as science and sometimes things go wrong so we have a range of utilities that we use to perform various kids of QA. Because the caches can be large, we usually want to perform a visual QA on the static tiles before pushing them up to wherever they are going to live full-time.

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How long until the ads stop?

In celebration of this day when the non-stop political ads, robo-calls, junk mail, and social media posts *should* finally come to an end. I threw together a little map to show the latest time at which polls close in each state. This should represent, state-by-state, the time (EST) at which you can safely go back to answering your phones. Click the image below to go there (the data takes a couple of seconds to load).

Democracy is a wonderful thing, but it will be nice to have this campaign season behind us.

Mapping GISPs Again With Leaflet.markercluster

So I’ve been playing with Leaflet a lot lately. It’s become my lightweight mapping library of choice. There’s a lot it doesn’t do so I keep OpenLayers and others in the rotation as well but Leaflet is direct and to the point so I use it when I can.

Click the image to go to the live demo

A while back, I stumbled onto the Leaflet.markercluster project on GitHub, which adds a clustering layer type. I wanted to try it so I revisited my old GISP heat map demo (Silverlight) and decided to rework it. I was happy to finally get a chance to strip out the plug-in, anyway. Continue reading “Mapping GISPs Again With Leaflet.markercluster”

CartoDB/Leaflet Sample Update

A while back, I posted about some experimentation I did with Leaflet and CartoDB in the wake of FOSS4G in Denver. I recently had the chance to go back and update that sample with some spatial queries. At the time of the original post, CartoDB was still in beta and spatial queries didn’t seem to work, despite the fact that the back-end was driven by PostGIS.

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Breaking Radio Silence

Things have been kind of quiet on the blog lately due to things being busy at work. I call that a good problem to have. Since the beginning of the year, I’ve written a a lot of proposals for a mixture of potential customers. Interestingly, I’m seeing a lot more call for “GIS Analyst” work. One trend I’ve noticed, at least in the Federal sector, is that the time between proposal due dates and award announcements seems to be lengthening. That may be an indication of the ongoing flux in funding and organizations try to figure out how to fund their requirements. It will be interesting to see how it shakes out. Of course, it’s good that the opportunities are there in the first place.

One the technical side of things, I’ve been involved in a smattering of things that’s made it hard to roll up one good post. I’m pretty heavily involved in the PIM efforts that my colleague, Barry Schimpf, has been blogging about over on the Zekiah blog. Continue reading “Breaking Radio Silence”

ArcGIS Image Services and Leaflet

I’ve become a big fan of Leaflet for putting maps on the web. It gives me most of what I need without much of what I don’t and is fairly easily extended, as shown by the impressive work of Jason Sanford.

A while back, Dave Bouwman blogged about work he and the team at DTS Agile had done extending Leaflet to support ArcGIS Server layers. Given that there are a lot of ArcGIS Servers out there, this is a good thing to have. Thanks to section 4(f) of the Esri Web Services Terms of Use, it’s less useful for use with ArcGIS Online, but that’s probably the topic of another post. Continue reading “ArcGIS Image Services and Leaflet”