This post explains how to connect to an Oracle database using the OLE DB connector and a tnsnames.ora file.

• Download the latest version of the Oracle Database Client for Windows (x64). You can use this link or Google it.
• Unzip the file and double-click on setup.exe.
• Select custom installation and follow the installation instructions.

• Choose an intallation folder (E.g., C:\oracle).

• Select components Oracle Net, Oracle ODBC Driver and OLE DB.

• Click on Next and finish the installation.
• Type environment variables in Windows' search bar and open the app. Then, click on Environment variables.

• Create a user variable named TNS_ADMIN and set its value to the path of the folder where your tnsnames.ora file is located.

• Open Qlik Sense and create a new OLE DB connection. In the Data Source textbox, type the name of the connection as it is in the tnsnames.ora file.

This guide describes how to convert an arbitrary image to a clickable map. I use it for drawings and sketches, for floor plans I often use another approach, see this article. 

Here's the high level workflow, using Qlik Sense, Qlik GeoAnalytics and open source tools:

1. Find a suitable image, the hardest part by far.
2. Bucket fill areas, I prefer Inkscape.
3. Vectorize and Simplify, QGIS is useful.
4. Load into Sense.
5. Done!

See below attachments for a step by step guide and some example files. The final result can be used in the native Sense map chart as well as in the map of Qlik GeoAnalytics for Sense and QlikView.