OpenStreetMap
Someone expects Canadians to sail their boats into the rocks.
It appears that the Alaska / BC border has been modified. In this area, the US side of the border takes up the whole channel. I think the border may be inaccurate between US and Canada.
Screenshot of the border area. http://www.use.com/6915458a0a159c770df4
토론
2012년 11월 22일 23:58에 z-dude님의 의견
The official coordianates are listed at http://internationalboundarycommission.org/products.html#coordinates
How do we convert Nad27 or nad 83 into a format that osm can import as a gps track?
2012년 11월 23일 01:58에 DENelson83님의 의견
The official coordinates would need to be integrated into all of the relations that follow that boundary, such as the boroughs of Alaska and the Regional Districts of BC.
2012년 11월 23일 02:40에 z-dude님의 의견
Ok. well, here’s the Nad83 coordinates in decimal format Degree + minute/60 + second/3600
1 54.6622202778 N -132.6841925 E ; 2 54.7074736111 N -130.6156275 E ; 3 54.7247319444 N -130.62864 E ; 4 54.7380730556 N -130.6257208333 E ; 5 54.7630575 N -130.6590380556 E ; 6 54.7827197222 N -130.6288736111 E ; 7 54.7921533333 N -130.5682030556 E ; 8 54.836665 N -130.4802538889 E ; 9 54.8512925 N -130.4543875 E ; 10 54.8733730556 N -130.4227158333 E ; 11 54.9177283333 N -130.3459375 E ; 12 54.9739641667 N -130.2733277778 E ; 13 55.0628413889 N -130.1875622222 E ; 14 55.0912511111 N -130.1808855556 E ; 15 55.1246161111 N -130.1524297222 E ; 16 55.1428422222 N -130.1461247222 E ; 17 55.1926022222 N -130.1028416667 E ; 18 55.2819186111 N -129.9741669444 E ; 19 55.3003713889 N -129.9766486111 E ; 20 55.3379161111 N -130.0211072222 E ; 21 55.4517252778 N -130.0412161111 E ; 22 55.4979780556 N -130.0898527778 E ; 23 55.5810344444 N -130.1279044444 E ; 24 55.6829013889 N -130.1116569444 E ; 25 55.7149033333 N -130.1477586111 E ; 26 55.7662872222 N -130.1524055556 E ; 27 55.8056416667 N -130.1247644444 E ; 28 55.8217075 N -130.0834930556 E ; 29 55.9074416667 N -130.0037847222 E ; 30 55.9119305556 N -130.003785 E ;
I used gpsbabel to create a gpx file but OSM didn’t like the format. I tried to upload a gpx, and got to a point where I could edit with the waypoints on the screen. I’ll leave the data here for now. It’s clear the portland canal should only have 28 markers in it.
2012년 11월 23일 04:32에 z-dude님의 의견
Could someone double check this before we fix the boundary? osm.org/browse/way/192178744
2012년 11월 23일 08:06에 pnorman님의 의견
I did some work with the BC/Washington State border some time ago using the IBC data
The IBC data is legally okay to use, so there’s no worries there.
By far the biggest task on the border is de-duplicating the various ways. Simply put, the border is a mess. The position is relatively easy to fix once the duplicate ways are fixed and all the boundary relations are okay.
I’ve prepared .osm files for the SE Alaska and Portland parts of the border at http://took.paulnorman.ca/ibc/
The best workflow I’ve found is to first clean up the border, making all of the boundary relations topologically consistent and then merge through point by point the turning points and monuments, merging existing nodes to them.
I’m currently working on SEAlaska.osm
I did not convert from NAD83 to WGS84 but this is in practice a non-issue as the differences are minimal.
2012년 11월 23일 08:51에 z-dude님의 의견
if it helps, I double checked the Georgia straight, and those navigation points appeared ok.