Frankly Alexander I'm not sure that I need to place the model on a map at all… I expect that placing a pin on a map that links to the model will be adequate. I was just thinking out loud I guess.

imagine that we make models of architectural art objects and that we want to add annotations that are directed at a specific facet of the object… the annotations may take the form of images or dialogue and to following a link to that content would allow for a dynamic response. Its easy to see why we want to place the objects on a map as each project may include several independent objects.

The objects that I want to add to the scene would be translucent if possible and will look like a wire frame (imagine a rectangle drawn in the XY with a dot drawn at an offset along the Z axis, like a stylized arrow head), I would prefer that each of these objects can be highlighted if activated (clicked) but only one of these objects can be highlighted at any one time. I would also hope that each of these objects can be modified slightly when clicked to indicate that they have been used (ticked) (following the hyperlinks presents me with an opportunity to update the status of the source data so that it can be persisted)
These objects will move relative to the 3D model also in the scene, The scene will not be animated at all and so every element of the scene will have a static position relative to all the other elements which will never change.
Right now I believe that I need scripts to create a new project and then import the foreign 3d model (ie an .obj or .3ds file) then carry out any real world location & orientation if possible, then proceed to generate the geometric objects to a scene by prescribing location and attitude data for each object. I'm not sure where this project sits best in the Blender ecosystem.

If its possible to build an entity that includes the imported foreign 3D model and all the geometric objects in advance and then populate its status data at runtime via the web-server then I suspect that doing so would be the perfect solution.

Thanks for that, I was looking at those examples yesterday. I'll have a closer look today.

Is it possible to use a real world coordinates system such as WGS84 so that the resultant model can be shown with its proper orientation in the correct location against a background map?

Thanks for your reply,
I would want to end up with a fully automated process, this part is just one of the stages (well… maybe two or three!).
The process starts with a user uploading material for processing within another toolset which results in the generation of a 3D model, that model will then need to be imported and then a large number of small objects/icons/geometric shapes will need to be added (with hyperlinks) relative to the original subject matter .. each hyperlink provide access to instance specific functionality on the same website.

I will need to learn how to import the 3D model and then how to generate the geometric shapes with hyperlinks, I expect the results will need to be packaged up in some way so that it can be saved at rest for rendering on demand as and when the web-server is asked.

Is there a library of scripts that can be used as a starting point for such a development task?

I want to end up in a position to programmatically add a 3D model to a scene and then dynamically add a number of objects to that scene, each of which can behave like a hyperlink and then I want that scene to be presented as a part of a web-page or web-application.
I would prefer that the outputs of this process do not require an special 'services' to be running in support of the web-pages that use them. In short I would prefer that this content just sits on the filesystem until called upon and that a typical web-server is all that is needed to serve this content.
I retired 5 years ago; I have 18 years programming experience but none of that is with Python, most of my experience is with object oriented languages such as VB, C# etc.