Thanks Grant

Here are Fran's reading from GCEBE:

1. Germany-Czech R-Poland N50 52.236 E14 49.399
2. Austria-Czeck R-Slovakia Not obtained
3. Austria-Hungary-Slovakia N48 00.401 E17 09.646
4. Austria-Hungary-Slovenia N46 52.147 E16 06.832
5. Austria-Italy-Slovenia N46 31.380 E13 42.846
6. Austria-Switzerland-Liechtenstein N47 16.245 E9 31.854
7. Germany-Switzerland-France N47 35.318 E7 35.387
8. Germany-Luxembourg-France N49 28.172 E6 22.001
9. Belgium-Luxembourg-France N49 32.781 E5 49.115
10. Belgium-Luxembourg-Germany N50 07.812 E6 08.255
11. Belgium-Netherlands-Germany N50 45.254 E6 01.258

I will try the readings for GEEBE.

Jesper

----- Original Message -----

From: Grant Hutchison

To: Boundary Point

Sent: Sunday, May 26, 2002 12:19 AM

Subject: [BoundaryPoint] European tripoint lat & long list

I've recently been downloading data from http://rimmer.ngdc.noaa.gov/coast/getcoast.html and extracting and collating international boundary data. This is tricky, since the boundary data are stored (at least in the downloaded text files) as numerous short segments, up to sixty per border segement. Not all are orientated in the same sense, so it takes a bit of effort to pick out all the data for a particular boundary and to collate it into a single sequence of longitude and latitude coordinates. I've also trimmed out multiple duplicated datapoints. I've used the World Vector Shoreline (WVS) data for longstanding borders, and have assembled borders in the former Yugoslavia and USSR from 1970s internal boundary data in the World Data Bank II (WDB). There are bound to be discrepancies between the real world and these old data, but I've uploaded a collated file for European borders (Europe.txt) to the files area - the more data the better, in my opinion, provided we are aware of the limitations, and this sort of information doesn't seem to be readily available from any other source. The file consists of a sequence of headers identifying each border segement (assembled from ISO digraphs in the usual way), each followed by a long list of longitudes and latitudes. When border segments come in two parts separated by another land boundary, they are differentiated by "n" and "s" or "w" and "e" suffixes in the header. When the land portions of a single boundary are interrupted by an arm of the sea (denl, depl, bahr) border segments are suffixed "1" & "2". Although the lats and longs are provided to a spurious six decimal places (10cm!), I think they're probably only accurate to a kilometre or so - this estimate is based on the fact that the line of international borders in WVS and in WDB often differ to this extent or more. This causes mismatches in tripoints that are defined by a mixture of WDB and WVS data. I've left this unresolved, simply breaking the WVS border at the closest point to the termination of a WDB border. For instance, I've broken the old Czechoslovakian/Austrian border (derived from WVS) into atcz and atsk segments - the position of the break was determined by the southern termination of czsk (derived from WDB). Tripoint data are easily derivable. Below, I give what I think is a complete list of 44 European tripoints, together with their longitude and latitude from WVS/WDB. I make no defence of their accuracy - I just report what the database says, and hope it may be of use or interest. Grant ================================= Tripoint Longitude Latitude adesfre 1.734605 42.502944 adesfrw 1.443304 42.600338 algrmk 20.991854 40.858106 almkyu 20.585558 41.879713 atchde 9.559833 47.539252 atchit 10.482139 46.859257 atchlin 9.541352 47.264673 atchlis 9.620557 47.058738 atczde 13.843980 48.776035 atczsk 16.947743 48.621657 athusi 16.116010 46.872458 athusk 17.161232 48.008913 atitsi 13.719305 46.519846 bahryun 19.039727 44.861367 bahryus 18.455585 42.565795 bedelu 6.133160 50.128398 bedenl 6.024326 50.752950 befrlu 5.834232 49.540516 bggrmk 22.944127 41.335687 bggrtr 26.362292 41.706194 bgmkyu 22.363579 42.320038 bgroyu 22.672481 44.212027 byltlv 26.613330 55.674703 byltpl 23.504141 53.946919 bylvru 28.168035 56.150304 byplua 23.604688 51.527772 byruua 31.783922 52.108027 chdefr 7.590838 47.582669 chfrit 7.046372 45.929910 czdepl 14.831118 50.834502 czplsk 18.851393 49.517488 defrlu 6.368137 49.461310 eelvru 27.371945 57.335523 finoru 28.912129 69.054744 finose 20.562383 69.063544 hrhusi 16.607745 46.476136 hrhuyu 18.904710 45.937244 huroua 22.894550 47.951122 huroyu 20.271082 46.125871 huskua 22.159404 48.398488 ltplru 22.770241 54.383870 mdrouan 26.635625 48.266918 mdrouas 28.217759 45.468317 plskua 22.570100 49.087870
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