Blog Category

Invalid Geometries

Posted in Database, Open Source GIS, Techniques on Jun 08, 2022

How can a geometry be invalid?  It sounds impossible but it can happen.  Fortunately, invalidity is not at all fatal.  Once you understand the problem, fixing it is easy.

Never Too Late to Tessellate

Posted in Database, Open Source GIS, Techniques on Dec 07, 2021

This is the final post in the simplification series.  It reveals a new way to restore the congruent fit of a polygon layer after it has been simplified.

On Topo the World

Posted in Database, Open Source GIS, Techniques on Aug 12, 2021

What is topology and why does it matter?  This post continues to explore the complications of simplifying GIS data.

The Pantry Principle

Posted in Database on Nov 02, 2020

Information is food for thought.  It's the home-cooked data casserole we all crave.  Of course, good information requires quality ingredients and careful preparation.  Proper storage is also an important part of a healthy diet.

A Trigger-Happy Solution

Posted in Database, Techniques on Sep 27, 2019

How can you change the symbol used to draw a feature on your map when a new record is written to a related table?  A smart database can do that for you.

The Cooperative Geodatabase

Posted in ArcGIS, Business, Database on Aug 13, 2017

What, exactly, is an enterprise GIS?  This post provides an overview and links to a SpherAware whitepaper that describes an ArcGIS security innovation for business environments.