AnsweredAssumed Answered

What is the standart for BAG creation?

Question asked by anzhi_yelimbaeva on May 20, 2016
Latest reply on May 26, 2016 by Dan_Patterson

Like • Show 0 Likes0
Comment • 11

Hello Dear GIS users.

Could you please advise with question regarding BAG file?

We are starting work with BAG format. We have Fledermaus and ArcGIS. Input data is x, y, z gridded file (0.5x0.5 meters). We calculate uncertainty using special order, after that export to BAG. When we compare in ArcGIS GeoTIFF from Fledermaus and BAG from Fledermaus we can see shift between them about 60-65 cm (See attached file).
What is the standart for BAG creation? I checked Fledermaus and CARIS software. And I have 2 different BAG files. Support team from QPS and CARIS tell me that is different method of grid creation. I can't understand why we have this difference and shifts, as I understand BAG file is format to exhange data between software.

Look forward

regards,

Anzhelika

Attachments

from_ArcGIS.png9.1 KB

No one else has this question

Outcomes

Dan_Patterson

May 20, 2016 5:28 AM

either your extents are different or they use a different method of referencing the grid. esri uses the center of the cell to denote position when creating rasters, other software may use a different location. In any event, they seem to be shifted by 1/2 cell size in the x and maybe 1 in the y direction. You will need to confirm the extents and cell sizes. Also, in arcmap, it is wise to use a snap raster to ensure that cell edges etc align properly

Actions

anzhi_yelimbaeva @ Dan_Patterson on May 24, 2016 2:35 AM

Hello Dan,

I don't understand how to confirm extend in ArcGIS& Is it special tool for do this?

regards,

Anzhelika

Actions

Dan_Patterson

@ anzhi_yelimbaeva on May 24, 2016 2:45 AM

right-click on a layer, select properties to bring up the layer properties and all the information is there ... check the Source tab.

Repeat for all layers since ArcMap does projection on the fly to make things 'look' aligned when they may in fact be in different coordinate systems.

Actions

anzhi_yelimbaeva @ Dan_Patterson on May 24, 2016 3:40 AM

I test tthat you recomended. It is take extent and data from source that I show in Source tab.

Is it possible to change extent using another raster?

Actions

Dan_Patterson

@ anzhi_yelimbaeva on May 24, 2016 3:47 AM

if they are in the same coordinate system, otherwise you are talking about a projection

Actions

anzhi_yelimbaeva @ Dan_Patterson on May 24, 2016 3:54 AM

2 rasters in the same projection.

Actions

Dan_Patterson

@ anzhi_yelimbaeva on May 24, 2016 4:02 AM

not sure why you want to use a different extent, but I think you are wanting to Shift—Help | ArcGIS for Desktop the raster

Actions

anzhi_yelimbaeva @ Dan_Patterson on May 25, 2016 3:50 AM

Thank you very much.

Actions

Dan_Patterson

@ anzhi_yelimbaeva on May 25, 2016 6:06 AM

Anzhelika, please close this thread if it was answered so others know a solution was arrived at.

Actions

anzhi_yelimbaeva @ Dan_Patterson on May 25, 2016 8:07 PM

Hello Dan,

I am still don't have answer for main question "What is the standart for BAG format". How we can use it as exchange file if different software create different output file.

Actions

Dan_Patterson

@ anzhi_yelimbaeva on May 26, 2016 6:09 AM

The BAG format is within the bathymetry data description. A good starting point would be the help files beginning at Essential bathymetric vocabulary—Help | ArcGIS for Desktop

within the various links the ISO standard is given amongst other things.

Actions

11 Replies

Dan_Patterson May 20, 2016 5:28 AM
Mark Correct
Correct Answer
either your extents are different or they use a different method of referencing the grid. esri uses the center of the cell to denote position when creating rasters, other software may use a different location. In any event, they seem to be shifted by 1/2 cell size in the x and maybe 1 in the y direction. You will need to confirm the extents and cell sizes. Also, in arcmap, it is wise to use a snap raster to ensure that cell edges etc align properly
Like • Show 1 Like1
Actions
- anzhi_yelimbaeva @ Dan_Patterson on May 24, 2016 2:35 AM
  Mark Correct
  Correct Answer
  Hello Dan,
  I don't understand how to confirm extend in ArcGIS& Is it special tool for do this?
  
  regards,
  Anzhelika
  Like • Show 0 Likes0
  Actions
  - Dan_Patterson @ anzhi_yelimbaeva on May 24, 2016 2:45 AM
    Mark Correct
    Correct Answer
    right-click on a layer, select properties to bring up the layer properties and all the information is there ... check the Source tab.
    Repeat for all layers since ArcMap does projection on the fly to make things 'look' aligned when they may in fact be in different coordinate systems.
    Like • Show 0 Likes0
    Actions
    - anzhi_yelimbaeva @ Dan_Patterson on May 24, 2016 3:40 AM
      Mark Correct
      Correct Answer
      I test tthat you recomended. It is take extent and data from source that I show in Source tab.
      Is it possible to change extent using another raster?
      Like • Show 0 Likes0
      Actions
      - Dan_Patterson @ anzhi_yelimbaeva on May 24, 2016 3:47 AM
        Mark Correct
        Correct Answer
        if they are in the same coordinate system, otherwise you are talking about a projection
        Like • Show 0 Likes0
        Actions
        anzhi_yelimbaeva @ Dan_Patterson on May 24, 2016 3:54 AM
        Mark Correct
        Correct Answer
        2 rasters in the same projection.
        Like • Show 0 Likes0
        Actions
        Dan_Patterson @ anzhi_yelimbaeva on May 24, 2016 4:02 AM
        Mark Correct
        Correct Answer
        not sure why you want to use a different extent, but I think you are wanting to Shift—Help | ArcGIS for Desktop the raster
        Like • Show 1 Like1
        Actions
        anzhi_yelimbaeva @ Dan_Patterson on May 25, 2016 3:50 AM
        Mark Correct
        Correct Answer
        Thank you very much.
        Like • Show 0 Likes0
        Actions
        Dan_Patterson @ anzhi_yelimbaeva on May 25, 2016 6:06 AM
        Mark Correct
        Correct Answer
        Anzhelika, please close this thread if it was answered so others know a solution was arrived at.
        Like • Show 0 Likes0
        Actions
        anzhi_yelimbaeva @ Dan_Patterson on May 25, 2016 8:07 PM
        Mark Correct
        Correct Answer
        Hello Dan,
        I am still don't have answer for main question "What is the standart for BAG format". How we can use it as exchange file if different software create different output file.
        Like • Show 0 Likes0
        Actions
        Dan_Patterson @ anzhi_yelimbaeva on May 26, 2016 6:09 AM
        Mark Correct
        Correct Answer
        The BAG format is within the bathymetry data description. A good starting point would be the help files beginning at Essential bathymetric vocabulary—Help | ArcGIS for Desktop
        within the various links the ISO standard is given amongst other things.
        Like • Show 0 Likes0
        Actions

GeoNet

The Esri Community

What is the standart for BAG creation?

Attachments

Outcomes

Related Content

Recommended Content