i read this post where coordinate are convert to different projection
1) about format and unit
INSERT INTO [poi] ([longitude_wgs84], [latitude_wgs84])
VALUES (30, 10), (30, 20), (30, 30), (30, 40), (30, 50);
What is for (30 ,10) the format for 30 and the unit of 30? ( ithink unit dfine format )
you ll say it depend of projection datum coordinate system !!
2) in the same post there are 2 projections define using epsg 'EPSG:3857', 'EPSG:4326'
what is the epsg or projection name of latitude/longitude ?
latitude and longitude are not a projection/Datum name !
flat surface mean also curve ?
4) i don't find the unit converter or coordinate system metric mfd9 gui ?
any clue ?
orthogonal surface curve
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