The TN 911 Project

So next week is the TN GIS meeting at Montgomery Bell State Park. Which will be the first conference I’ve walked into in 2 years and 2 months. I’m doing two things while I’m there – well three: Walk a lot Teach an OSM workshop Give a talk on...
Loading a DEM into PostGIS

Loading a DEM into PostGIS

I haven’t mentioned the TN911 project in a while. Work happens on that when I have time or are motivated – I took a bit of a break to pursue some other tech rabbit holes. I ended up back on it due to some work with pyqgis/addressing questions which led me...

August 2005

OK – lets drag up some old memories that are a bit cloudy. Lets flash back to 2005. Back in 2005 I was working for the Feds. I think at that point I was toying with leaving and doing something else: consulting, working for another company, etc. Really I was in...

Drop Down Menus for the TN NG911 Server

The problem is I have too many options. Options are awesome except when you’re dealing with people inputting data and you only want them to do it one way. QGIS has had the ability to build drop down lists for a good while and it’s a very flexible way to...

Topology: QGIS Geometry Checker and other tools

So lets dive more into “I need to fix my data”. In this case I have two layers – one is polygon and one is linestring.The polygon layer has overlaps and gaps. The linestring layer has dangles and is not intersected correctly causing more dangles. We...

QGIS: Revisiting Topology

When you’re writing a blog two things tend to happen: You rehash old topics that you covered 4 or 5 years ago. Usually that’s fine because something has changed enough you can cover it again and not sound repetitive. You get to the point where “I...