[Talk-us] finding city boundary info?

[Mike Thompson]

On Sun, Nov 8, 2020 at 7:16 PM Ray Kiddy <ray at ganymede.org> wrote:

> It appears that you are telling me how to select the objects which are
> part of the relation.
>
Sorry about that, the last step should be:
In the "tags" dialog on the right of the JOSM screen it will list the way
as a member of the relation, right click the relation and from the
resulting menu, click "Select Relation"

> The east and north edge of the block shown below in red is not part of the
> relation, but should be.
>
In OSM the relation for Blythe only has one member that is a way.  The
other member is a node, which oddly, is some distance away.

> I know that that red block is object # 383948. But does this show me where
> it is in openstreetmap's data? I am not seeing any name associated with
> that object in the TIGEER data, nor am I seeing any tiger tags associated
> with any of the lines near that area in the openstreetmap data. So, how can
> I connect the two?
>
I presume that "object # 383948" is from the TIGER data? I don't think you
can count on any external unique identifiers being preserved in OSM.

> much thanx - ray
> On 11/8/20 4:07 PM, Mike Thompson wrote:
>
> JOSM
> <Download Button>
> "Areas around Places" Tab
> "Blythe, CA"
> Select "boundary"
> "Download"
> Select any part of the boundary on the map (in this case it is a relation
> with only one member)
> In the "tags" dialog on the right of the JOSM screen it will list the way
> as a member of the relation, click the relation and it will be selected.
>
>
>
> On Sun, Nov 8, 2020 at 4:47 PM Ray Kiddy <ray at ganymede.org> wrote:
>
>> Hello -
>>
>> Can anyone explain the best way for me to do something here? I am trying
>> to identify the city boundaries of a city in California. Right now, there
>> is a relation for the city of Blythe which covers a very small area to the
>> west of the city. And then there is a node in the center of the city. I how
>> (mostly) how to use both JOSM (not as an expert) and iD. But there is
>> obviously something here that I do not understand.
>>
>> Blythe is on the border of California and Arizona on the interstate
>> between LA and Phoenix.
>>
>> I have downloaded the 2019 TIGER data for California (
>> https://www2.census.gov/geo/tiger/TGRGDB19/tlgdb_2019_a_06_ca.gdb.zip).
>>
>> I can load the data in QGIS, select "Incorporated Places" and I see this:
>>
>> If not in email, see:
>> https://opencalaccess.org/misc/Screen%20Shot%202020-11-08%20at%203.26.32%20PM.png
>>
>> There it is. Blythe, CA.
>>
>> Then I can zoom in and see a little bit of the edge on the southern city
>> of the city.
>>
>>
>> If not in email, see:
>> https://opencalaccess.org/misc/Screen%20Shot%202020-11-08%20at%203.30.13%20PM.png
>>
>> So, we are looking at object # 383948. The north and east edges of this
>> block makes up part of the city boundary.
>>
>> Now, how do I find out what the features on the north and east side of
>> the block are called? How do I find this in the map using either JOSM or
>> iD? I was hoping that I could search for the tiger object with this id but
>> I cannot seem to. Is there are way to find it that I do not see?
>>
>> When the TIGER data was in the form of text files (about 10 years ago), a
>> line in the TIGER data set would show its name. But it does not contain
>> this information in the GDB files? Is there somewhere else one can get this?
>>
>> What am I missing here?
>>
>> If I can find the feature in JOSM, then I can add it to the relation.
>> Shouldn't TIGER lines be somewhere in the map here, findable in JOSM? How
>> can I search for them?
>>
>> Any suggestions would be appreciated.
>>
>> thanx - ray
>>
>>
>> _______________________________________________
>> Talk-us mailing list
>> Talk-us at openstreetmap.org
>> https://lists.openstreetmap.org/listinfo/talk-us
>>
>
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