Quite through chance I just happened to stumble upon the USGS New EarthExplorer, and I’m really quite impressed. Remote sensing is a field that is almost entirely based around new technology: satellite sensors, computer processing techniques and so on, but for ages actually acquiring the data has been an exercise in frustration. Much as the […]
As part of my DunesGIS project I had a need to calculate ‘closeness statistics’ for objects in ArcGIS. By ‘closeness statistics’ I mean statistics giving information about how close the objects are to each other. I needed to do this to calculate how dune patterns change over time. The code below takes a shapefile as […]
No, this isn’t about thinking deeply while the wind is blowing, or philosophising about how the wind is there but we can’t see it – it’s about sand dunes. Now, you might think that sand dunes are quite boring things, just hills made out of sand that sit there and do nothing. That couldn’t be […]
I’ve recently starting scripting ArcGIS using Python as part of one of my academic projects (about which I’ll post more later) and needed to be able to snap points to polylines – that is, move points so that they lie on the nearest polyline. An example would help to explain this: In the image above, […]