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seeking a good example that shows the correct method for mapping counties and townships

3

Most of the counties in Ohio are missing the townships. I'd like to begin by adding the townships that exist in my county, and I've been reading everything I can find about relations, boundaries, etc. (I'm a newbie).

It would be really helpful to have a good example where this is done correctly so that I can examine how the shared boundaries are tagged...and any other info that would help would be greatly appreciated!

asked 20 Nov '14, 14:07

unigami's gravatar image

unigami
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3 Answers:

1

According to https://wiki.openstreetmap.org/wiki/Admin_level#10_admin_level_values_for_specific_countries, townships should be admin_level=7 in most of the US.

I would highly recommend using type=boundary, boundary=administrative relations for these. Then those boundary ways can be reused for multiple townships/cities/counties/etc. Here's an example of a township done with relation: https://www.openstreetmap.org/relation/2342528

answered 20 Nov '14, 16:19

neuhausr's gravatar image

neuhausr
7.5k870121
accept rate: 21%

1

Thank you!

(20 Nov '14, 18:14) unigami

1

Have a look at Ireland. In Ireland, we're adding admin_level=10's (which we call townlands). The ways that make them up are shared with the higher level admin boundaries (like admin_level=9/6/etc.)

e.g. https://www.openstreetmap.org/relation/4118986

answered 25 Nov '14, 13:15

rorym's gravatar image

rorym
5.4k1449100
accept rate: 11%

1

I've been doing the same in Pennsylvania and have Clarion, Butler, Armstrong, and Greene Counties completed. You can take a look at some of my more recent edits to see how I've done these township relationships. The only difference you would have is admin_level... PA has incorporated townships, so their level is 8, while OH would use level 7.

answered 26 Nov '14, 05:55

vinlendingur's gravatar image

vinlendingur
412
accept rate: 0%

Source code available on GitHub .