March 7, 2022
by chris
11 Comments
This post is also published on TagDoc – you can read it there as well if you prefer. To many, even to some experienced OSM community members, the free tagging system of OpenStreetMap appears chaotic, unorganized and inefficient. And it … Continue reading
January 6, 2022
by chris
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About nine years ago i did the first import of up-to-date data for the Antarctic followed by another with more detailed data a short time later. The intention of those was to provide a solid basis – both in terms … Continue reading
September 25, 2021
by chris
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Satellite images and their use have become much more popular in recent years. There was already an earlier wave of broader popularization of satellite imagery with image layers being widely introduced in popular map services on the internet between about … Continue reading
August 2, 2019
by chris
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Some time ago i introduced a new technique for producing accurate color mosaics from Landsat and Sentinel-2 data using pixel statistics methods. Here now some larger area 3d views of Europe produced using this imagery allowing for a more accurate … Continue reading
June 11, 2019
by chris
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Reviewing OpenStreetMap data processed to generate visualizations of builtup areas i noticed some peculiar structures in northern India. Here how this looks like: These are the result of selective mapping in OpenStreetMap – some mapper has mapped settlements along a … Continue reading
November 23, 2018
by chris
13 Comments
I have mentioned several times already that i wanted to write a blog post on verifiability in OpenStreetMap. The need for that from my perspective grew over the last 1-2 years as it became increasingly common in discussion in the … Continue reading
October 18, 2018
by chris
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Back in July 2017 when the first Sentinel-3 Level-2 data was released i did not write a detailed report like i did for the Level-1 data because i wanted to wait for the rest of the products – which are … Continue reading
April 21, 2018
by chris
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As regular readers of this blog know i have produced quite a few satellite image mosaic products over the past years and reviewed the work of others in that field as well. New products of this type have been introduced … Continue reading
February 11, 2018
by chris
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As many of you know for a few years now we have a new trend in remote sensing and cartography that is called Artificial Intelligence or Machine Learning. Like many similar hypes what is communicated about this technology is little … Continue reading
September 6, 2017
by chris
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I wrote about the problem of positional accuracy of satellite images before on several occasions. Working with images from the Arctic for the update of the Franz Josef Land map again i realized a few things i wanted to share … Continue reading