Projection of a v7 Dgn files

Hi,
I have a 2 dgn file that it's created in microstation v7.Now I want to reproject them in UTM zone 32 wgs84. If we use V8 it looks fine but when we save them as V7 they will not mount over each other to coincide the coordinates(Problem of global origine).so I used the FME to reproject them and here weh we add the ref file it mout in the real position but we have some problem regarding cell (final cell is very big then the first )also there many burst in all association.Our goal is to get a a Dgn in UTMzone 32 wgs84 with no problem regarding refs or Cells.


Parents
  • Hi Makhlouf,

    MicroStation v7 did not have the option to use Geographic Coordinate Systems so when you apply a Geographic Coordinate System to you DGN file in MicroStation V8i and following open the same DGN file with MicroStation J/V7 the file might not look right.
    V7 DGN format files have a much small Design Plane then V8 DGN files so after reprojecting the data the Global Origin might have been moved outside the Design Plane in MicroStation V7.

    This forum discussion explains it much better: communities.bentley.com/.../328547

    Regards,
    Anders

       

  • Thanks for your quick answer. I see that V7 not have the Option of GCS but why when we use FME with V7 seed file we have no problem regarding refs but only Cell was very big and some bursting in association. So I'm asking if there is any way to use microstation v8 GCS Then save as V7 and the ref mount in the same location.
    Thanks.
    Rajab Makhlouf
    GIS Analyst
  • Unknown said:
    Why when we use FME with V7 seed file we have no problem regarding refs

    It's possible with a set of MicroStation V7 DGN files to create a local coordinate system and move the DGN global origin so that a small number of maps are located correctly.  That won't work with a large number of maps that span a substantial area of the world's surface because of the limited coordinate span of the integer coordinate system used by V7 DGN files.

    Unknown said:
    I'm asking if there is any way to use MicroStation v8 GCS Then save as V7 and the ref mount in the same location

    The MicroStation V8 DGN format was introduced in 2001: see the History of MicroStation.  It removes many of the limitations of V7 DGN files.  The V8 DGN fomat adds new capabilities.  In particular, its floating-point coordinate system means that V8 DGN model coordinates have a far greater cartographical span than the integer coordinate system used in V7 DGN files.  In addition, Bentley Systems introduced geographical positioning so that a V8 DGN can have global coordinates and can therefore be positioned accurately anywhere on the world's surface.

    You can't retrofit MicroStation V8 DGN capabilities into a V7 DGN file format.  You can't ask MicroStation V7 to perform tasks that it was not designed to fulfill.

    MicroStation V7 was obsolete fifteen years ago.  Why do you want or need to use that old file format?  Why not simply move to MicroStation CONNECT and take immediate benefit from a more flexible file format and a more capable application?

     
    Regards, Jon Summers
    LA Solutions

Reply
  • Unknown said:
    Why when we use FME with V7 seed file we have no problem regarding refs

    It's possible with a set of MicroStation V7 DGN files to create a local coordinate system and move the DGN global origin so that a small number of maps are located correctly.  That won't work with a large number of maps that span a substantial area of the world's surface because of the limited coordinate span of the integer coordinate system used by V7 DGN files.

    Unknown said:
    I'm asking if there is any way to use MicroStation v8 GCS Then save as V7 and the ref mount in the same location

    The MicroStation V8 DGN format was introduced in 2001: see the History of MicroStation.  It removes many of the limitations of V7 DGN files.  The V8 DGN fomat adds new capabilities.  In particular, its floating-point coordinate system means that V8 DGN model coordinates have a far greater cartographical span than the integer coordinate system used in V7 DGN files.  In addition, Bentley Systems introduced geographical positioning so that a V8 DGN can have global coordinates and can therefore be positioned accurately anywhere on the world's surface.

    You can't retrofit MicroStation V8 DGN capabilities into a V7 DGN file format.  You can't ask MicroStation V7 to perform tasks that it was not designed to fulfill.

    MicroStation V7 was obsolete fifteen years ago.  Why do you want or need to use that old file format?  Why not simply move to MicroStation CONNECT and take immediate benefit from a more flexible file format and a more capable application?

     
    Regards, Jon Summers
    LA Solutions

Children
  • Thank you for your prompt response and for all the information regarding our questions. Actualy we have no possibility to migrate to the new version of Mst v8 as our Mst V7 is related with a Mge and Informix database and all our data was in V7. I'm asking if we can use Mst V8 with old MGE? since I can't actualy migrate our Mge system.
    Best Regards
  • MGE

    Unknown said:
    I can't actualy migrate our MGE system

    The Modular GIS Environment (MGE) is ancient.  Developed by Intergraph (now Hexagon GeoSpatial), it dates back to the days of steam-powered computers.  It used the progenitor of MicroStation, the Interactive Graphics Design System (IGDS), which is essentially the DGN V7 file format.

    Intergraph declared MGE obsolete twenty-five years ago; it was superseded by a complete new technology, Intergraph GeoMedia, which does not use the DGN file format.

    Bentley Systems developed MicroStation GeoGraphics, which was backwards compatible with MGE but was itself superseded in about 2005 by Bentley Map.

    MGE is not a Bentley Systems product.  In fact, it predates the existence of Bentley Systems.  Have you contacted Hexagon about your problems?

    Migration Paths from MGE

    Unknown said:
    I'm asking if we can use MicroStation V8 with old MGE?

    MGE is a GIS.  MicroStation is not a GIS.  No, you can't simply substitute MicroStation for MGE.

    Unknown said:
    Our Mst V7 is related with a MGE and Informix database and all our data was in V7

    Informix is now owned by IBM and is at version 12.  You probably need to consider bringing your database up to date.

    MicroStation V8 can read/write/edit V7 DGN files.   However, the current GIS product is Bentley Map, which uses MicroStation as its graphics engine.  Bentley Map, therefore, can read your V7 DGN files and use them with its GIS database.  Bentley Map can work with a database, but you would be better advised to post to the Geospatial Desktop Forum if you want details of that product concerning Informix.

     
    Regards, Jon Summers
    LA Solutions