Question

I don't know how to create a new coordinate system for Spain

  • 14 July 2020
  • 1 reply
  • 1 view
L

Hello,

 

I have a Smallworld database in a coordinate system that I cannot find (or are not) in FME Workbench.

The main data:

- Datum: ETRS89

- Ellipsoid: GRS80

- Type of Projection: Cylindrical, North UTM

- Zone: 30

- Origin of Latitudes: 0.000 m

- Origin of Lengths: -4000000.000 m

- Units: mm

Attached image:

I have tried the Safe web assistant but I think something is wrong. It looks like this:

COORDINATE_SYSTEM_DEF Prueba_CABB \\

DESC_NM "Para CABB" \\

DT_NAME ETRS89/01 \\

PARM1 30 \\

PARM2 1 \\

PROJ UTM \\

QUAD 1 \\

UNIT METER \\

ZERO X 0.000 \\

ZERO_Y -4000000.000

 

But I'm not sure it's correct.

 

I would greatly appreciate your help

 

Regards

 

Luis

1 reply

daveatsafe
Rank
Userlevel 2
Badge +17

Hi @lucho,

The UTM projection doesn't allow any settings other than datum, zone and hemisphere. It might be better to use the TM projection instead, which is the same projection, but allows a bit more customization. I think a good match for your coordinate system would be:

COORDINATE_SYSTEM_DEF Prueba_CABB \
    DESC_NM "Prueba_CABB" \
    DT_NAME ETRS89/01 \
    ORG_LAT 0 \
    PARM1 -3 \
    PROJ TM \
    QUAD 1 \
    SCL_RED 0.9996 \
    UNIT MILLIMETER \
    X_OFF 0 \
    Y_OFF -4000000000

The units are set to MM, and the Y_OFF is set in MM.

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