February 20, 2013
by chris
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Peter Selinger has released a new version of potrace which contains a new backend I have written to generate GeoJSON output. This simplifies use of potrace for geographic applications which previously required to convert from eps or dxf files. I … Continue reading
February 11, 2013
by chris
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Today NASA successfully launched the new Landsat satellite. This is very good news for anyone involved in Earth visualization. The background of Landsat and what is being emphasized by NASA and USGS is the continuity of coverage with previous satellites … Continue reading
February 11, 2013
by chris
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I recently published some thoughts on generalization and included some samples of generalized coastlines there. I have now cleaned up the program used for that and make it available as open source. I also put up a set of files … Continue reading
February 4, 2013
by chris
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One of the major things i noticed when i started working on the coastline generalization techniques was the very mediocre quality of the coastline data for Antarctica in Openstreetmap. This is particularly interesting since Antarctica is in fact exceptionally well … Continue reading
February 3, 2013
by chris
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I added the Canadian Geobase data to the elevation data search tool and also improved usability of the tool, especially adding an optional larger map to specify the search area.