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.
Why Simplification Is Complicated
Posted in Open Source GIS, Techniques on May 24, 2021
Efficiency and resolution go hand-in-hand. This post challenges the accepted best practice for simplifying vector graphics for use at smaller scales.
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.
Getting to the Point
Posted in Android, Techniques on Mar 13, 2018
Virtually all Android mobile devices have a a magnetic field sensor (or magnetometer). So why would developing a compass control be so challenging? Take a quick peek under the hood and find out.