The Solar Power Project II

In 2007 I bought a set of 7 second hand solar panels. I installed them…

GPSMAP 66sr and 67 accuracy compared

To prepare for hiking in the mountainous area of Madeira, I bought a Garmin GPSMAP…

GPS Accuracy of the Garmin Flagships

As a kid I fantasized about how great it would be to have a map…

Garmin GPSMAP 67 unacceptable drift

This is a report on an issue of the Garmin GPSMAP 67 in which we…

KeePass, Keeweb with OneDrive and Dropbox

Introduction This blog describes some hints to get a self hosted Keeweb working with a…

Mercator projections, a comparison

Introduction While writing the previous post on Rijksdriehoeksmeting and OziExplorer, we came upon two map…

OziExplorer and Rijksdriehoeksmeting

Introduction OziExplorer is my favorite tool for working with topographical maps. Even in this era…

Serving your own PDOK maps

I am fascinated by navigation and maps. When I visit a new location one of…

White balance underwater

A well known phenomenon to divers is the fact that water absorbs light, the red…