We often classify tries like this (5 degrees of
success):
In the files section: BP.Classes.txt
--- "Dave Patton [DCP]" <
dpatton@...>
wrote:
> The short version of this email:
>
----------------------------------------------------------
> - has anyone visited BCIDWA or BCIDMT, and if so,
> is the visit info online?
> - if there have been no visits, is there info online
> that documents the locations of these tripoints?
> - for the Degree Confluence Project we have rules
> about
> what constitutes a successful visit to a
> confluence,
> and that is all outlined on our website - is
> there
> somewhere that I can refer to online for this
> group's
> 'rules' for a successful tripoint visit &
> documentation?
>
----------------------------------------------------------
> The long version is listed below :-)
>
>
> Two years ago, I asked in this group for any
> information
> about the British Columbia/Idaho/Washington(BCIDWA)
> and
> British Columbia/Idaho/Montana(BCIDMT) tri-points:
>
http://groups.yahoo.com/group/BoundaryPoint/message/6843
>
> I never did make it to either point - my trip was
> cut short:
>
http://www.confluence.org/confluence.php?lat=49&lon=-117&visit=2
>
> I may be going to the area of these tripoints again
> fairly soon.
> Brian Butler indicated in 2002 that he was going to
> try visiting
> these tripoints in 2003:
>
http://groups.yahoo.com/group/BoundaryPoint/message/6846
> but his website doesn't have any info about them:
> http://www.bjbsoftware.com/corners/us_canada.html
> and he hasn't replied to a recent email(June 30th)
> from me.
>
> Does anyone have any additional information?
>
> Here's what I have so far. I'm using OziExplorer as
> my mapping program. Unless otherwise indicated, all
> coordinates listed below are using NAD27 CONUS.
>
> BCIDWA
>
======================================================================
> A) Data sources
> From the University of Washington Geospatial Data
> Archive website:
> http://wagda.lib.washington.edu/data/drgs.html
> the Salmo Mountain 1:24,000 DRG(with full map
> collar):
>
http://duff.geology.washington.edu/data/raster/drg/sandpoint/o48117h1.zip
>
> From the Idaho Panhandle National Forests GIS
> webpage:
>
http://www.fs.fed.us/ipnf/eco/yourforest/gis/index.html
> the IPNF National Forest Boundary in Arc/Info export
> format(e00):
>
http://www.fs.fed.us/ipnf/eco/yourforest/gis/lands/forestbdry.zip
> NOTE: the e00 file was imported into OziExplorer as
> a track,
> assuming NAD27 CONUS, and UTM Zone 11.
>
> International Boundary Commission's NAD27 Boundary
> Segments webpage:
>
http://www.internationalboundarycommission.org/ibccoordnad27.htm
> the data for section M. 49th Parallel:
>
http://www.internationalboundarycommission.org/coordinates/M49thp.txt
> NOTE: the NAD27 IBC data was converted to a format
> that could be
> imported into OziExplorer as a waypoint for each
> boundary monument.
> NAD27 was assumed to mean NAD27 CONUS.
>
> B) Data validation
> DRG map image is calibrated correctly, as UTM and
> lat/lon
> grid lines superimposed by Ozi match up with the
> map's tick
> marks. Map image calibration done automatically by
> OziExplorer.
>
> The locations of the Canada/USA Border Monuments 194
> and 195
> are shown on the DRG, and the waypoints from the IBC
> data are
> shown on the map as matching the center of the map
> symbol.
>
> The track showing the IPNF Boundary matches closely
> with the
> Canada/USA and Washington/Idaho borders.
>
> C) BCIDWA Tripoint Coordinates
> Based on setting a waypoint in OziExplorer, centered
> on the
> junction of the Canada/USA border with the
> Washington/Idaho
> border, as shown on the DRG:
> N 48� 59' 57.3628" W 117� 01' 52.7731"
> From a June 2002 email from Brian Butler:
> N 48� 59' 57" W 117� 01' 53"
> From the "corner" trackpoint of the IPNF Boundary
> data:
> N 48� 59' 57.4096" W 117� 01' 53.1115"
>
> If there is a monument at the Cananda/USA border,
> then it
> of course would be definitive as to the tripoint
> location.
> The DRG to the south of Salmo Mountain, Helmer
> Mountain:
>
http://duff.geology.washington.edu/data/raster/drg/sandpoint/o48117g1.zip
> shows Washington/Idaho Border monuments 165 and 166,
> with 166
> being to the north of 165. The Salmo Mountain DRG
> shows monument
> 177, which is 949 meters due south of the border.
>
> If there is no Washington/Idaho border monument at
> the Canada/USA
> border, I'm inclined to consider the first
> coordinate shown above
> to be the best one at this point, because:
> - Brian's coordinates are only to the nearest
> second, and don't
> place the waypoint exactly on the border
> intersection
> - the IPNF boundary data matches the middle of the
> Cananda/USA
> border line shown on the DRG, and also matches
> the middle of the
> Washington/Idaho border line shown on the DRG
> south of border
> monument 177. However, there is a data point at
> monument 177,
> but north of that, the next two data points(one
> of which is the
> "corner" point)line up with the west edge of the
> Washington/Idaho
> border line, not the center.
>
======================================================================
>
>
> BCIDMT
>
======================================================================
> A) Data sources
> From the Idaho Department of Lands Geographic
> Information Systems
>
http://gis.idl.state.id.us/GIShtm/static/GisProgram.htm
> via the Dynamic Data Server, the Canuck Peak
> 1:24,000 DRG
> (with full map collar):
>
http://gis.idl.state.id.us/webGIS/drgzip/h1rc4816.zip
>
> International Boundary Commission's NAD27 Boundary
> Segments webpage:
>
http://www.internationalboundarycommission.org/ibccoordnad27.htm
> the data for section M. 49th Parallel:
>
http://www.internationalboundarycommission.org/coordinates/M49thp.txt
> NOTE: the NAD27 IBC data was converted to a format
> that could be
> imported into OziExplorer as a waypoint for each
> boundary monument.
> NAD27 was assumed to mean NAD27 CONUS.
>
> From the Idaho Panhandle National Forests GIS
> webpage:
>
http://www.fs.fed.us/ipnf/eco/yourforest/gis/index.html
> the IPNF National Forest Boundary in Arc/Info export
> format(e00):
>
http://www.fs.fed.us/ipnf/eco/yourforest/gis/lands/forestbdry.zip
> NOTE: the e00 file was imported into OziExplorer as
> a track,
> assuming NAD27 CONUS, and UTM Zone 11.
>
> B) Data validation
> The Canuck Peak(h1rc4816) DRG map image, when
> automatically
> imported into OziExplorer doesn't appear to be
> calibrated
> correctly. UTM and lat/lon grid lines superimposed
> by Ozi
> match up with the map's tick marks for Longitude,
> but are
> "not quite right" for Latitude. Also, the IBC border
> monument
> waypoints show up slightly north of the symbols on
> the map,
> and the IPNF boundary tracklog shows up as slightly
> north
> of where it should be(e.g. in the vicinity of Canuck
> Peak).
>
> I used OziExplorer's 'Move Map Calibration' tool to
> adjust
> the map calibration by 6 pixels, and then all the
> grid lines
> matched the map ticks.
>
> The locations of the Canada/USA Border Monuments
> 220, 221,
> and 222 are shown on the DRG, and the waypoints from
> the
> IBC data are shown on the map as matching the center
> of the
> map symbol.
>
> The track showing the IPNF Boundary matches the
> NAD27 49th
> parallel, and also the boundary line drawn on the
> DRG in
> the lower part of the quadrangle, near Canuck Peak.
>
> C) BCIDMT Tripoint Coordinates
> Based on setting a waypoint in OziExplorer, centered
> on the
> junction of the Canada/USA border with the
> Idaho/Montana
> border, as shown on the DRG:
> N 49� 00' 03.2520" W 116� 02' 53.6531"
> From a June 2002 email from Brian Butler:
> N 49� 00' 03" W 116� 02' 53"
>
> If there is a monument at the Cananda/USA border,
> then it
> of course would be definitive as to the tripoint
> location.
> The Canuck Mountain DRG shows Idaho/Montana Border
> monuments
> 2 through 12, with 2 being 1.8956 meters due south
> of the border.
>
> If there is no Idaho/Montana border monument at the
> Canada/USA
> border, I'm inclined to consider the first
> coordinate shown above
> to be the best one at this point, because:
> - Brian's coordinates are only to the nearest
> second, and don't
> place the waypoint exactly on the border
> intersection
>
======================================================================
>
> --
> Dave Patton
> Canadian Coordinator, Degree Confluence Project
> http://www.confluence.org/
> My website: http://members.shaw.ca/davepatton/
>
>
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