September 24, 2013
by chris
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There are essentially two established and broadly used methods of mapping things in Openstreetmap: With GPS or by tracing aerial or satellite images. In the early days GPS was by far the most important method but with the availability of … Continue reading
September 11, 2013
by chris
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My 3D earth views usually show the ocean as a reflective surface while the lakes are rendered as they appear on the satellite images. Since the satellite takes the images from straight above while the 3D view looks at an … Continue reading
September 9, 2013
by chris
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One interesting feature of the new Landsat 8 satellite launched earlier this year is the capability to record off-nadir images. Normally earth observation satellites look straight down at the earth surface. The capability to tilt the view sidewards allows recording … Continue reading