In my previous post, I showed how to prepare the data for a bivariate choropleth map using PostGIS and QGIS. I also indicated that there...

Click to see the online map You’ve heard about how good my undergraduate GIS students are here, here, and here.  Oh yeah, and here and...

She also has an innate ability to work with GIS, and pick up new things: one day she has never programmed in Python, and the next day,...

The Web GIS Duel: Final Thoughts This is a continuation of Mark Balwanz’s blog posts on his creation of web mapping sites using both ESRI...

previous video, I showed how Radian studio can read data directly from PostgreSQL, SQLite, and also easily exchange data between them.  ...

As the years passed, I came out with a number of other documents in the series: How do I do that in Manifold SQL, How do I do that in...

GIS Programming students presented their programming projects to ESRI. First, I cannot say enough to thank ESRI for taking time out of...

our merry band of 12 undergraduate GIS students presenting their research posters at SUSRC. Today was the Salisbury University Student...

How I used SQL to generate an accumulated sum of spatial data My friend Tomas does work with business analytics, and wanted to find a way...

A friend recently asked me to help him generate polyline shapefiles with Z and M values that he could deliver to a customer.  The problem...

As most of you know, I am a big fan of spatial SQL.  It is my go-to tool whenever working with GIS.  But, I have seen too many people...