Hi,
I would like to thank you all for the great suggestions. I managed to provided the required info with your suggestions. Regards, Rodrigo -------- Mensagem original -------- Em 15/09/2025 17:55, Olly Betts via Therion <[email protected]> escreveu: > On Mon, Sep 15, 2025 at 04:01:21PM +0300, Mykyta Kozlov wrote: > > Following example converts cartesian coordinates in the LKS94 coordinate > > system, which has EPSG (SRID) code 3346 to lat-long over WG84, which has > > 4326 EPSG code, > > with precision up to 8 decimal digits (~1.1 mm accurate). > > > > cs2cs +init=epsg:3346 +to +init=epsg:4326 -f "%.8f" coords_file_lks94 > > > coords_file_wgs84 > > Whether it's actually *accurate* to about 1mm depends on whether the > coordinate reprojection can be done that accurately. > > You can check this with projinfo: > > $ projinfo --summary -s EPSG:3346 -t EPSG:4326 > Candidate operations found: 1 > unknown id, Inverse of Lithuania 1994 + LKS94 to WGS 84 (1), 1 m, > Lithuania - onshore and offshore. > > The "1 m" part is telling you this transformation is only accurate to > 1 *metre* (which is not a problem for many uses e.g. plotting on a > map or if you want to find an entrance using GPS). > > If you run without `--summary` you can see why this is the case here (amongst > much other output): > > REMARK["LKS94 is a national realization of ETRS89 and coincident to WGS > 84 within 1 metre. This transformation has an accuracy equal to the > coincidence figure."]]], > > Some transformations are more accurate: > > $ projinfo --summary -s EPSG:3857 -t EPSG:4326 > Candidate operations found: 1 > INVERSE(EPSG):3856, Inverse of Popular Visualisation Pseudo-Mercator, 0 > m, World. > > Some less: > > $ projinfo --summary -s EPSG:26922 -t EPSG:4326 > Candidate operations found: 1 > unknown id, Inverse of UTM zone 22N + NAD83 to WGS 84 (1), 4 m, North > America - onshore and offshore: Canada - Alberta; British Columbia; Manitoba; > New Brunswick; Newfoundland and Labrador; Northwest Territories; Nova Scotia; > Nunavut; Ontario; Prince Edward Island; Quebec; Saskatchewan; Yukon. United > States (USA) - Alabama; Alaska (mainland); Arizona; Arkansas; California; > Colorado; Connecticut; Delaware; Florida; Georgia; Idaho; Illinois; Indiana; > Iowa; Kansas; Kentucky; Louisiana; Maine; Maryland; Massachusetts; Michigan; > Minnesota; Mississippi; Missouri; Montana; Nebraska; Nevada; New Hampshire; > New Jersey; New Mexico; New York; North Carolina; North Dakota; Ohio; > Oklahoma; Oregon; Pennsylvania; Rhode Island; South Carolina; South Dakota; > Tennessee; Texas; Utah; Vermont; Virginia; Washington; West Virginia; > Wisconsin; Wyoming. > > And some unknown: > > $ projinfo --summary -s EPSG:9712 -t EPSG:4326 > Candidate operations found: 1 > unknown id, Inverse of UTM zone 24N + Ballpark geographic offset from > NAD83 to WGS 84, unknown accuracy, World, has ballpark transformation > > Cheers, > Olly > _______________________________________________ > Therion mailing list > [email protected] > https://mailman.speleo.sk/listinfo/therion > _______________________________________________ Therion mailing list [email protected] https://mailman.speleo.sk/listinfo/therion
