Discussion If you are like me, and if so, I apologize and sympathize, then you probably have a few layers that you use all the time. These are likely part of your base layer set that you include in most of your maps. For me, these include parcels, roads, the city boundary, and aerial photos. WHen I include these layers, …
QGIS – Loading Data
Accessing data in QGIS A few years ago now, I wrote a post covering adding vector layers to QGIS. Much time, development, and improvement has passed since then. Since the usefulness of QGIS increases proportionally with your ability to actually add data to it, it is time to revisit this topic. QGIS has a toolbar strictly for adding data. It …
GIS Enabled Database Part 2 – PostgreSQL
This is the second in a series of posts that will look individually at a number of different database formats. I will discuss installing and basic configuration, as well as how to enable support of spatial data types in the database. This post will be on the open-source RDBMS, PostgreSQL. The first step is going to be obtaining the software. …
GIS Enabled Database Part 1 – MySQL
The first step in putting together an open source suite of GIS software is to install some sort of storage medium for your spatial data. There are many options out there, ranging from the ESRI personal geodatabase, which uses a Microsoft Access database, to a fully relational database management system like PostGreSQL with PostGIS. Each post in this series will …
The Command Line – What’s the Use?
The title of this post is in some ways rhetorical because to some people, this is their primary means of interaction with a computer. With the majority of people, though, I think a safe assumption is that the command line is something they have heard about, but don’t really understand where it is, or even, why they would want to …
QGIS – Vector Data Connection
Update – April 2017 Many things have changed with QGIS over the last few years since this post was written. I thought it worth the time to revisit the topic and expand its scope. Please take a look at my new post: QGIS – Loading Data —————– One of the major differences between many COTS applications and Open-source is in …
Open Source GIS Central – OSGeo.org
Finding open source GIS software is as simple as a Google Search. Of course, once you do that, sorting through the hundreds of returns to find something useful, is likely to be a challenge. If you look at the results for “open source GIS”, the first would seem likely. That site, however, hasn’t been updated since 2008. The 2nd return, …
Where, but also why and how
This is the first post of the blog, so I suppose I should say what I think it is going to be about. Initially, I was going to begin writing a series of tutorials for using open source GIS products to mimic the functions of ESRI’s ArcGIS software suite. The more that I have started using free, open-source software though, …