Changeset: 141390169
Gaujas tecējuma trajektorijas korekcija
Closed by Treisijs
Tags
changesets_count | 893 |
---|---|
created_by | iD 2.27.1 |
host | https://www.openstreetmap.org/edit |
imagery_used | Orthophoto (2016–2018), 1:5000, Latvia;Cadastral map, Latvia |
locale | lv |
Discussion
-
Comment from Pikse
Why country border was separated from Gauja centerline here and in related changesets?
Country border no longer accurately follows the border provided on Estonian Land Board (Maa-amet) maps. In OSM editors you can check this using e.g. Maa-amet Basic Map, or the following custom imagery: http://tiles.maaamet.ee/tm/tms/1.0.0/kaart@GMC/{z}/{x}/{-y}.png
I didn't find the official border description at the moment but presumably the border is supposed to follow river centerline, and Maa-amet maps are correct. Last time that I check this in OSM, a year ago or so, river centerline along the border was also mapped fairly accurately.
I don't quite get what exactly was supposed to be improved here, and what sources did you use. In changeset tags above you refer to external map layers that don't even include the country border. It looks as if you used some outdated map for country border, which is especially evident around river meanders like the one in this location:
https://www.openstreetmap.org/#map=18/57.60102/26.27293 -
Comment from Pikse
I now see you made the country border follow LGIA data, as shown e.g. here:
https://vietvardi.lgia.gov.lv/vv/mv_lgiamap5n?p_x=635898&p_y=386533&p_id=95586Though, I would still consider it unlikely that the actual border is described as a set of coordinates that follow all these old river bends (their former shape) rather than it being described simply to follow the river centerline. Unless you have the exact border description in hand that suggests otherwise, I would consider the LGIA data outdated or less accurate, and I would restore the country border as provided on Maa-amet maps.
Also, as long as the border exactly follows the river centerline, I believe it is reasonable to keep this data conflated in OSM.
-
Comment from Pikse
As there has been no response I went forward and restored country border along river centerline.
-
Comment from Treisijs
Main stream of river changes over time. That means - river main flow is not same as border.
-
Comment from Treisijs
There are cadastral map in Latvia, where can see actualy border line between countries. I create border from there.
-
Comment from Pikse
If border is defined to follow the river, which is likely the case, then as river changes the border changes, too. This is reflected on maps by Maa-amet, also e.g. here: https://xgis.maaamet.ee/xgis2/page/link/xCT0U7DM
I see that LGIA distributes somewhat conflicting data but this data is likely oudated, as argued above. To be entirely sure we should check from official border description. Do you happen do know where to find it?
Ways (9)
- Stepupe (125212275), v6
- 130430209, v7
- 132368727, v5
- Gauja (444261913), v11
- Gauja (444449831), v25
- 909563701, v2
- 955859380, v2
- 1092161524, v2
- 1092675086, v2
Relations (1)
- 11198025729, v1
- 11198025730, v1
- 11198025731, v1
- 11198025732, v1
- 11198025733, v1
- 11198025734, v1
- 11198025735, v1
- 11198025736, v1
- 11198026537, v1
- 11198026538, v1
- 11198026539, v1
- 11198026540, v1
- 11198026541, v1
- 11198026542, v1
- 11198026543, v1
- 11198026544, v1
- 11198026545, v1
- 11198026546, v1
- 11198026547, v1
- 11198026548, v1
Welcome to OpenStreetMap!
OpenStreetMap is a map of the world, created by people like you and free to use under an open license.
Hosting is supported by Fastly, OSMF corporate members, and other partners.
https://openstreetmap.org/copyright | https://openstreetmap.org |
Copyright OpenStreetMap and contributors, under an open license |