Code sample for setCoordinateSystem w/ EPSG

Sebastian · March 11

Dear all,

I am trying to set a coordinate system via an EPSG code to a file. When browsing the documentation I cannot find any samples or functions to do so. I have spotted

getEpsgCode(int &) const =0 (defined in AcDbGeoCoordinateSystem)

I could not identify any setEpsgCode method. Please kindly assist with a code sample (C# or C++) on how to set EPSG code to a file.

Best regards

Sebastian

Its_Alive · March 12

I found a sample here.
https://adndevblog.typepad.com/autocad/2016/04/positioning-geographicmarker-using-objectarxx.html

I have a python wrapper, but it’s not release, it works in AutoCAD, but crashes BricsCAD.
So I still need to investigate what’s going on


import traceback
from pyrx_imp import Rx
from pyrx_imp import Ge
from pyrx_imp import Gi
from pyrx_imp import Gs
from pyrx_imp import Db
from pyrx_imp import Ap
from pyrx_imp import Ed
#from pyrx_imp import Cv

# debug
def PyRxCmd_pydebug() -> None:
    import PyRxDebug
    PyRxDebug.startListener()

def getGeoDataId(db: Db.Database) -> Db.ObjectId:
    if not Db.Core.hasGeoData(db):
        data = Db.GeoData()
        data.setBlockTableRecordId(db.modelSpaceId())
        return data.postToDb()
    return Db.Core.getGeoDataObjId(db)

def PyRxCmd_doit() -> None:
    try:

        db = Db.curDb()
        geoCS = Db.GeoCoordinateSystem.create("UTM84-43N")
        xmlStr = geoCS.getXmlRepresentation()
        print(geoCS.getEpsgCode())

        geoDataId = getGeoDataId(db)
        if geoDataId.isNull():
            return

        geoData = Db.GeoData(geoDataId, Db.OpenMode.kForWrite)
        geoData.setCoordinateSystem(xmlStr)
        geoData.setCoordinateType(Db.GeoTypeOfCoordinates.kCoordTypLocal)
        geoData.setHorizontalUnits(Db.kUnitsMillimeters)
        geoData.setVerticalUnits(Db.kUnitsMillimeters)
        geoData.setDesignPoint(Ge.Point3d.kOrigin)
        geoData.setUpDirection(Ge.Vector3d.kZAxis)
        refPtInLatLong = Ge.Point3d(78.384402, 17.434586, 0.0)
        refPtInUTM84 = geoData.transformFromLonLatAlt(refPtInLatLong)
        geoData.setReferencePoint(refPtInUTM84)
        geoData.setNorthDirectionVector(Ge.Vector2d.kYAxis)

    except Exception as err:
        traceback.print_exception(err)

Code sample for setCoordinateSystem w/ EPSG

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