Over the past several weeks, I’ve been getting progressively more frequent emails from the Binary Canary monitoring service letting me know that CalTopo was down. It was sometimes unresponsive for extended periods of time, but since it generally came back on its own, I did what any good developer would do and ignored the problem until it […]
I’ve written previously about the MODIS satellites and their constant imaging of the planet; CalTopo’s fire activity layer is derived from their infrared sensors, with a lot of post-processing by the federal government. There’s now a new pair of layers that make use of the visible-spectrum sensors: current and archived MODIS imagery. The Latest MODIS […]
A few years ago, I ran across Dan Cervelli’s excellent Closed Contour map of the Sierra. At the time I was just getting started with CalTopo and learning my way around GIS, and Closed Contour really opened my eyes to the cool stuff you can do with Mapnik. I had no idea it was so […]
Printing Geospatial PDFs that can be used in programs like Avenza PDF Maps is an oft-requested feature that’s been hanging over my head for some time. Having looked into it and abandoned the effort, I’ve lived life dreading the prospect of wading back into the fray. However I took another crack at it this week and, armed […]
In keeping with the recent line style update, I’ve made some changes to marker icons. While a few icons have been added, the focus was adding colorability and rotatability, and laying the groundwork to add additional icons at a later date. Instead of showing all possible icons, the marker dialog now shows the icon’s style, […]
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