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I work for a construction company and I want to create a topography/ground level for a site that is not flat. I have imported an image as plane with an over-layed a pdf screenshot of the site with the survey levels included.

I want to be able to place a vertex on each of these points to allow me then to adjust the height for each point. This is rhw image I'm working with.enter image description hereSubdivision only seems to let me place more vertices on regular points. Any help would be much appreciated.

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    $\begingroup$ Why don't you convert the PDF to SVG (if it contains vector data) and import the SVG into Blender? $\endgroup$
    – quellenform
    Commented May 6, 2022 at 13:05
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    $\begingroup$ Also do you have access to the actual topographical data from this site? Blender has several addons that can import topological data in several forms and convert it to a mesh. $\endgroup$
    – Jakemoyo
    Commented May 6, 2022 at 14:49

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You can do it. Just enable add-on Add mesh: Extra objects: enter image description here

For now, you'll see a single vert option in add menu: So, if you want to place vertex in specific position - just use shift + right mouse button hotkey to place your cursor in desired place and add the vertex.

enter image description here

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