Vector Contour Lines
Posted 23 February 2008 - 02:51 PM
Posted 24 February 2008 - 01:44 AM
Hello all and thanks for having this forum. I was hoping that some may have an idea of where to buy vector Contour lines 100m elevation for a select area in BC, Canada. The only place so far is the Canadian Government and they want my first born.
Can you indicate which area you're looking for? It's pretty easy to generate contour lines from SRTM using Global Mapper. The results would probabely be a bit less than topographically created contour lines, but it may work just fine for what you're trying to do (and it won't cost you nearly as much).
Feel free to contact me privately if you're interested.
Email: firstname.lastname@example.org / Twitter: @redgeographics
Posted 26 February 2008 - 03:17 PM
Hope this helps.
Posted 26 February 2008 - 05:29 PM
There is a setback with the elevation data, the lowest elevation data is exactly 20m, & the coastline is stored as a polygon in shp format. You can only obtain shp files, Geogratis does not have e00 format where you can extract the coastline as line data. When creating DEMS with the elevation data in Manifold I often find bleeds of the 20m data showing up where it should be reading 0m.
Canada has relesased all its 1:50000 basemap data on the Geogratis web site. You just need to obtain a user name and password and you can down load the data in shape file format by Topo map index (50k and 250k). Also, you can download the 20 m elevation data from the Geobase web site as well as other datasets and satellite imagery.
Hope this helps.
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