January 14, 2019
by chris
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It took me somewhat longer this time but i have prepared my traditional yearly report on open data satellite image acquisition numbers – for Sentinel2 and Landsat – for the October 2017 to October 2018 time frame. See last year’s … 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
August 11, 2018
by chris
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Once upon a time, a few years ago, there was a startup company called what3words that tried (and apparently still tries) to make money out of selling an address system based on encoding geographic coordinates into a string. To anyone … Continue reading
March 20, 2018
by chris
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Tomorrow once again the annual FOSSGIS conference starts – this year in Bonn. At the moment it looks like it is going to be pretty damn cold… I am going to present a talk on Thursday afternoon about design oriented … Continue reading
February 23, 2018
by chris
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Some news on open data satellite images: I updated the satellite image coverage visualizations. Here is the matching coverage volume plot over time: There are several important things you can see in that: With Landsat 8 the USGS has for … Continue reading
November 1, 2017
by chris
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About a year ago i wrote my report on the first year acquisitions of Sentinel-2 as well as for Landsat on a matching time frame. This was – and still is to my knowledge – the most detailed and accurate … Continue reading
October 12, 2017
by chris
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There has recently been some discussion in OpenStreetMap on names and labeling due to some people expressing the desire to abandon the geographically neutral labeling on the OpenStreetMap standard style. One of the things this discussion once again showed is … Continue reading
September 2, 2017
by chris
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I have updated the Franz Josef Land map with new data based on mostly 2016 Sentinel-2 imagery and also using a relief rendering primarily based on ArcticDEM data as a test case for the new data set. Franz Josef Land … Continue reading
September 1, 2017
by chris
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Some readers have already been waiting for this – i have now completed my initial review of the ArcticDEM elevation data set which is being produced and published in several stages during this year by the University of Minnesota and … Continue reading
July 28, 2017
by chris
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One of the pitfalls when OpenStreetMap contributors map remotely based on aerial or satellite images without recent on-the-ground knowledge is that it sometimes leads to “improving” seemingly inaccurate data based on outdated information. The most iconic examples for this are … Continue reading