[OpenLayers-Dev] OpenLayers 6 and only WGS 84 API with Polar coordinate systems

[Rahkonen Jukka (MML)]

Hi,

My concern was if the accuracy of conversions is good enough in WGS 84 system because one meter jumps around the North pole have quite big effect on Lon coordinates and quite small effect on Lat coordinates.

gdaltransform -s_srs epsg:3574 -t_srs epsg:4326
0 0
-40 90 0
0 1
140 89.9999910451167 0
0 -1
-40 89.9999910451167 0
0 -2
-40 89.9999820902333 0
1 -2
-13.434948822922 89.9999799762722 0

-Jukka-


Lähettäjä: Andreas Hocevar <andreas.hocevar at gmail.com>
Lähetetty: perjantai 6. syyskuuta 2019 0.32
Vastaanottaja: Rahkonen Jukka (MML) <jukka.rahkonen at maanmittauslaitos.fi>
Aihe: Re: [OpenLayers-Dev] OpenLayers 6 and only WGS 84 API with Polar coordinate systems

Hey,

nothing to be worried about. We’re only adding convenience, not removing any features regarding projections.

Andreas.

On Thursday, September 5, 2019, Rahkonen Jukka (MML) <jukka.rahkonen at maanmittauslaitos.fi<mailto:jukka.rahkonen at maanmittauslaitos.fi>> wrote:
Hi,

I followed the recording from FOSS4G 2019 about the new features in OL 6 https://media.ccc.de/v/bucharest-337-openlayers-6-there-and-back-again. At time 16:35 there is a slide that states “Use only geographic coordinates (WGS 84) in the API”. I wonder if such change would make it difficult to work with the Polar coordinate systems like those used in the Arctic SDI geoportal https://geoportal.arctic-sdi.org/ (press the World icon under the scale slider for selecting your favourite). Do we need to be worried?

Jukka Rahkonen
National Land Survey of Finland

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