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A comment on Oilslick – an elevation map showing fine detail in terrain.

Re:Oilslick – an elevation map showing fine detail in terrain by tppiotrowski on Saturday February 19, 2022 @08:39PM (#30402398)
Can anyone yield some insight into the process of producing x/y/z web mercator .png DEM map tiles from Jonathan de Ferranti's [1] data? His data is in .hgt format.

[1] http://www.viewfinderpanoramas.org/dem3.html

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Re:Oilslick – an elevation map showing fine detail in terrain by mandiantBob on Saturday February 19, 2022 @10:45PM (#30403022)
The best articles for this are [1] (google translate it) and [2]. In [1], the author uses .asc files while in [2], .img files are used. You can treat these files as basically the same as .hgt but remember to reproject the data as different DEM sources uses slightly different projections.

[1] https://makina-corpus.com/sig-webmapping/representation-des-... [2] https://github.com/nst-guide/terrain

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