Merging lakes split on YT border

Turned out to be quite involved, but now have an automated solution. How to automatically merge polygons sharing a common boundary, keeping all attributes from class “A” features? Interactively I would do this in an edit session by: selecting all objects of Name “One”, Editor toolbar >> Merge, choose Class “A” to be the parent/master…

Editing Shapefile DBF

Excel 2007 is the last version that supported in place editing of .dbf files. Access 2010 is the last version that can import .dbf files (though Excel 2010 and 2013 can still read them, via drag and drop). What to do? If it’s Excel’s usability you’re after (extended search and replace, repeat previous values, fill,…

Rescuing data from OziExplorer

Should you ever find yourself needing to use data locked away in OziExplorer format: drop me a line I can convert them to shapefiles for you lickety split. However, if I’ve been smushed under a bus or some other unpleasant scenario here’s how you can help yourself: Use the free GPS Visualizer online service. What…

Where people ride

What if you could draw a map of where people ride their bikes or run? Based on actual usage data, not just looking at transit map or an aerial photo of where people might ride, could ride because “well, there’s space for it there”. It’s being done. I hear “Yah, ummm ok”. This is the…

Be amazed: Lidar in the browser

Below is a screenshot of a 342mb raw LiDAR file rendered in a browser. Entirely client side. There is no server processing involved. Just you, some data, all 12.5 million points of it, and a browser. Oh yeah, it moves too. 3D you know? Technology and the constant wonders of the internet are my daily…

It’s all about the data

Very early in my GIS career, about 1995, my coworkers and I made a big map (3ft by 6ft at 1:250,000). It took several months and was the best we could do at the time. It was good, but, in my mind, not as good as I wished. It was printed by a 4 colour…