Magnetic North and True North

MagneticDeclinationCapeTown

A magnetic compass, including the compasses on most smart phones, does not point to the North Pole, or even to the North Magnetic Pole. Instead, it points away from True North by an angle known as the … [Read more...]

News Roundup: Polar ice caps, poachers and space detectives

ArcticSeaIceSept2014

Polar ice caps The US National Snow & Ice Data Center (NSIDC) has recently updated their KML files of Arctic and Antarctic ice to include 2014 data. We have looked at their work many times in the … [Read more...]

The Napa earthquake in satellite imagery

NapaEarthquake_1

We recently came across this map in the Maps Gallery which alerted us to the the fact that Google Earth (and Maps) has imagery taken soon after the magnitude 6.0 earthquake that struck Napa Valley, … [Read more...]

Disappearing Tongan islet

Monuafe

We came across an interesting story about a Tongan islet disappearing. Read more about it here. To see it in Google Earth, look about 5km North West of Nuku'alofa, Tonga, or fly straight to it with … [Read more...]

New Google Earth Imagery – October 4th, 2014

Imagery Updates, 4th October 2014_small

Thank you to GEB readers André, Martin and Maarten for letting us know that Google did an imagery update on 4th October, 2014. Imagery updates for 4th October, 2014 - Larger version. Google has … [Read more...]

Animated historical imagery of Europe

HistoricalImageryEurope_static

Following on from yesterday's post about historical imagery, we thought it would be interesting to make an animation. As you can see below, we have created an animated gif image showing the historical … [Read more...]

Historical Imagery

How to get Historical Imagery

We have covered historical imagery a number of times since its introduction to Google Earth with version 5.0 in February 2009. However, it is such an important feature that it is worth … [Read more...]

Drawing straight lines with KML

FilledPolygonRhumb

While writing the 3D imagery post we came across this oddity: If you draw a path in Google Earth, the line segments follow geodesics, which are parts of great circles. If you draw a polygon, the sides … [Read more...]

Exploring Ocean Tectonics from Space

GlobalGravityAnomaly

Google Earth's 3D view of the Ocean floor was first introduced in version 5. It has been improved a number of times since then. Panaromio photos in the oceans were added in 2010 and underwater Street … [Read more...]

Will Google update imagery upon request?

PhotoSphere

Google get their imagery from a wide variety of sources, and due to there being so many factors involved, it is impossible to predict when and where they will do updates. We have covered this a number … [Read more...]