Error in visualisation of map in different CRS

[Krishna Lodha]

I'm trying to add `EPSG:6708` to my CRS system and I grabbed bounds and proj definition from https://epsg.io/6708 . 

{

"code": "EPSG:6708",

"def": "+proj=utm +zone=33 +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +units=m +no_defs",

"extent": [

-331278.39182019, 3884128.41246344, 802757.85485572, 5224005.23112021

],

"worldExtent": [5.93, 34.76, 18.99, 47.1]

}

but instead of showing OSM of Italy, it is showing somalia. 

What might be the cause of this ? 

[Renzo Carlucci]

Hi Krishna,

have you tryed to check your bounding box coordinates:

defined in "extent".

"extent": [-331278.39182019, 3884128.41246344, 802757.85485572, 5224005.23112021]

with the original projected ones for the epsg 6708:

-331278.39 3846440.97 865258.04 5256332.65

[Renzo Carlucci]

Hi Krishna,

have you tryed to check your bounding box coordinates:

defined in "extent".

"extent": [-331278.39182019, 3884128.41246344, 802757.85485572, 5224005.23112021]

with the original projected ones for the epsg 6708:

-331278.39 3846440.97 865258.04 5256332.65

renzo

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[Krishna Lodha]

Tried it but no luck. Please check screenshots

[Renzo Carlucci]

Maybe it is an exchange between Nord and East coordinates.

For this reason the epsg 7792 is, as of today, the new version of epsg 6708. It is the same with inversion of N and E.

Also 7792  it is now the mandatory in Italy instead of 6708.

[harry cr7]

Hello,

if you take the correct extent, which i suppose you did

you have to take the proj4 for the def part  in this website:"https://epsg.io/6708". in your case you ve to use this "+proj=utm +zone=33 +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +units=m +no_defs +type=crs"

your projection bound for italy is correct 

"

[Krishna Lodha]

Hi @lorenzo , what is your opinion on this ? can we use 6708 or do we need to move to 7792 ? 

[Krishna Lodha]

Hi lorenzo, what is your opinion on this ? Should we move our data from 6708 to 7792 ? or is there any way we can still use 6708 ? 

On Wednesday, May 29, 2024 at 7:10:30 PM UTC+5:30 harry cr7 wrote:

[Surendhar Dharmalingam]

Hi Krishna,

EPSG:6708 refers to the coordinate system RDN2008 / UTM zone 33N (N-E), used primarily for engineering surveys and topographic mapping in Italy. It is a part of the RDN2008 realization of ETRS89. The coordinate system uses northing and easting (N, E) axes. EPSG:7792 is an updated version that swaps the N and E axis order to conform with GIS conventions.  So it is ultimately up to the user to choose between EPSG:6708 (RDN2008 / UTM zone 33N with North-East axes) or EPSG:7792 (RDN2008 / UTM zone 33N with East-North axes). Both refer to the same underlying coordinate system but differ in how the axes are ordered. Some contexts or software might prefer one format over the other. However, no strict mandate forces users to adopt one over the other unless a specific project or software requires a particular format.

In MapStore, this projection definition should help display CRS bounds correctly for 6708. Please give it a try, and let us know if you need further assistance. Thanks!

{

  "code": "EPSG:6708",

  "def": "+proj=utm +zone=33 +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +units=m +no_defs +type=crs",

  "extent": [-331278.39, 3846440.97, 865258.04, 5256332.65],

  "worldExtent": [5.93, 34.76, 18.99, 47.1]

}

Regards,

Suren

[Surendhar Dharmalingam]

Marking this issue as resolved due to inactivity. Please feel free to reopen if the issue persists. Thanks!