Manifold Community Site: Can't create anchor points correctly

RE: Can't create anchor points correctly

wvayens — Sat, 29 Nov 2025 17:21:05 GMT

I'm stumped trying to create callouts can't seem to create an anchor point.

I've attached a test file I've been working with, which are precincts in my area. I have a Point that's the center of my shape, which I created long ago and is plotting correctly.

However, if I try and create an anchor point, either by duplicating that GeomPoint or creating a separate point (GeomAnchor2) using the function GeomMakePoint, they don't end up in the correct location.

I'm using EPSG:2237 (most government files around here use this) and every field and drawing uses this.

Can any point point me in the direction of what I'm doing wrong here?

Thanks,

Attachments:
PrecinctTest.map

RE: Can't create anchor points correctly

wvayens — Sat, 29 Nov 2025 20:25:59 GMT

Ok, I've made some progress by using the transform/center function to create my center points and anchor points.

However, when creating the callout line, it's still not appearing where it should be.

I've attached my updated map file.

Attachments:
PrecinctTest.map

RE: Can't create anchor points correctly

yves61 — Mon, 01 Dec 2025 07:29:30 GMT

You have the same projection in both drawings, fine.

BUT check >>> the drawings use different Local scale X and Y .

Precincts Drawing has Local scale X and Y = 1

Precincts Callout Drawing has Local scale X and Y = 3.280833333333333

RE: Can't create anchor points correctly

yves61 — Mon, 01 Dec 2025 07:53:33 GMT

So something went "wrong" converting US FEET to meters (or vice versa)

1 / US Feet (0,304800609601219...) = 3.280833333333333

RE: Can't create anchor points correctly

yves61 — Mon, 01 Dec 2025 08:54:28 GMT

If you set Precincts Callout Drawing Local scale X and Y = 1 , all GeomCallout appear in the right position.

RE: Can't create anchor points correctly

wvayens — Mon, 01 Dec 2025 20:49:33 GMT

Thanks for taking the time to spot the problem.

I barely understand projections, never ran into local scale before.

Have no idea how the local scales ended up different on this particular drawing, given they were based upon the same original geometry.

But now I know what I'm looking for when I run into this the next time (not the first time I've had this problem!)

Thanks again.