Importing data in Oasis Montaj
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Transcript of Importing data in Oasis Montaj
Session Two
Working with data
In this Session
• Opening new or existing Project
• Importing data into Oasis Montaj
• Basic operations on database channels
• Gridding of simple data.
• Basic operations on grids.
Opening new or existing Project
Def.Project file include links to all databases, grids and maps. Oasis Montaj adopt this kind files so that all previous analysis are recorded for further analysis or interpretation. Remember, at the end of session you need to make sure that you saved all your work to the project file opened.
We have two options under project menu item, New and Open. If you are starting from scratch you choose “New” otherwise, choose “open”. Clicking any of the two will result in opening a file manager window (next slide).
File manager window to create or open project
Demonstrating this step on real OM session
It is recommended to open new directory of your new project. Transfer your data files to that directory save your work (e.g. database, grids, maps …etc.) their. It is also recommended to make backup for that directory each time you carry out analysis and modeling within your project to avoid loss of your work.
Importing Data
Your data Import
OM database
Q. What does “database” mean?
a usually large collection of data organized especially for rapid search and retrieval (as by a computer)
Q. What are the kinds of data I can import into Oasis Montaj?
Any data that can be tabulated in the form of columns can be imported to OM. The file format can be ascii, Spreadsheet (excel), databases …etc. In addition some industry standard formats like AMIRA and SEGY can also be imported.
Import data from this menu item
Data formats that can be imported
ASCII
EXCEL SPREADSHEET
We will concentrate on
Importing ASCII files
ASCII files is a plain text file that can be generated, edited using any text editor such as notepad.
Data should be tabulated into columns with separation like space, tab or comma.
Importing ASCII file
Browse for the ASCII file you want to import.
Wizard optionThis option defines how the data in the ascii files are arranged. For example, the headers, the text separation and the data type (e.g. numbers, date …etc)
After defining the data in the file you may save this definitions into template files, if you have other files with similar formats. For subsequent file readings you use the template option instead of wizard.
Put database name here.
Database window
Demonstrating this step on real OM session
Operations in databasewindow
Two typesof operations Channel def. and
view options
Operations on the data
Inside the channel
Operations on the data
statistics
Show profile
Shoesymbols
Gridding
Coord. definition
Choose channel data and gridding scheme
Demonstrating this step on real OM session
Working with Array channels
Array channel are usually used when importing Resistivity, Seismic, GPR …etc.
X and Y here represent the location of observationOr modeling points at the earth’s surface. The Z channel
Cannot be a single value. That’s why we adopt array channelsIn place of ordinary single values ones.
Sample database with array channel
Array channel
How to import array channel using ASCII import option?
Well, this can be done in the definition of data format using the wizard as in the following example.
Original Data
x yResistivity
Starting from this column
choose
Then enter the number of columns of your array channel here
Demonstrating this step on real OM session
Importing data from xls files
Choose whether your dataAre represented in
Single or multi-sheets
Create new database
Browse for xls file to import
Choose this then press OK
Demonstrating this step on real OM session
End of data Import Session