Visualizing Oracle Spatial data in ArcGIS and QGIS

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For both ArcGIS and QGIS, installing the Oracle client is essential for establishing a reliable connection.
Oracle Client Installation

  1. Download: Visit the Oracle Technology Network to download the Oracle Client

              https://www.oracle.com/database/technologies/instant-client/downloads.html

  1. Extract and Install: Unzip the package and run the setup.exe installer.

follow based on below images.






  1. Network Configuration: Use the Oracle Net Configuration Assistant to set up the connection details in tnsnames.ora.


2. Connecting ArcGIS to Oracle

ArcGIS seamlessly integrates with Oracle databases to manage geodatabases and perform spatial analyses.

Steps to Connect:

  1. Open ArcGIS: Launch the application and navigate to the Catalog pane.
  2. Create a Database Connection:
    • Right-click Databases and select New Database Connection.
    • Set Database Platform to "Oracle."
    • Enter the instance name (TNS entry) and authentication credentials (username and password).
  3. Test and Save: Validate the connection and save it. The database will appear under Databases in the Catalog pane.

Using the Connection:

  • Browse and add Oracle tables or feature classes to your ArcGIS project.
  • If working with ArcGIS Enterprise, publish feature services directly from the Oracle database.

Troubleshooting Tips:

  • Verify tnsnames.ora for correct entries.
  • Check environment variables such as ORACLE_HOME and PATH.


3. Connecting QGIS to Oracle

QGIS provides robust tools for connecting and visualizing Oracle Spatial data.

Steps to Connect:

  1. Install the Oracle Instant Client:
    • Download and extract the Instant Client from Oracle's website.
    • Add its directory to your system's PATH.
    • Ensure the tnsnames.ora file is configured with the correct service details.
  2. Enable Oracle Provider in QGIS:
    • Go to Plugins > Manage and Install Plugins and activate the "Oracle Provider."
    • Verify that GDAL/OGR includes Oracle drivers (check under Help > About > Providers).
  3. Add Oracle Layers:
    • Open Data Source Manager by pressing Ctrl+Shift+O.
    • Select Oracle Spatial Layer, then configure:
      • Service: Name from tnsnames.ora.
      • Credentials: Enter username and password.
Test and load layers into your QGIS project.

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