[FWTools] As uninformed as they get

Greg Nuspel Greg.Nuspel at telus.net
Fri Dec 29 13:59:01 EST 2006

I am having difficulties combining vector information from different
sources. I think the main issue is projection, but I could be so wrong that
you'll all be laughing.

The first file is a road file and the only info I can find that I think is
related to  projection is:

Spatial Reference Information: 
Horizontal Coordinate System Definition: 
Latitude Resolution: 0.0000001 
Longitude Resolution: 0.0000001 
Geographic Coordinate Units: Decimal degrees 
Geodetic Model: 
Horizontal Datum Name: NAD83CSRS (North American Datum 1983 in Canadian
Spatial Reference System) 
Ellipsoid Name: GRS80 (Global Reference System 1980) 
Semi-major Axis: 6378137 
Denominator of Flattening Ratio: 298.257222101

The second file has this info:
Map_Projection_Name: Lambert Conformal Conic 
Standard_Parallel: 49.000000 
Standard_Parallel: 77.000000 
Longitude_of_Central_Meridian: -105.000000 
Latitude_of_Projection_Origin: 49.000000 
False_Easting: 0.000000 
False_Northing: 0.000000 
Planar_Coordinate_Encoding_Method: coordinate pair 
Abscissa_Resolution: 0.016384 
Ordinate_Resolution: 0.016384 
Planar_Distance_Units: meters 
Horizontal_Datum_Name: D_Clarke_1866 
Ellipsoid_Name: Clarke 1866 
Semi-major_Axis: 6378206.400000 
Denominator_of_Flattening_Ratio: 294.978698

I am sure you have a method of changing the projection of one to match the
other, after that I do know how to extract the area I want using OGR2OGR.
Failing that I am looking for a source of data for the Invermere Valley of
British Columbia. I am trying to build up scenery for a soaring flight
simulator (Condor) and I want to avoid using photographic overlays to create
the roads, railways, rivers and lakes on a landscape rendered in Terragen.
So any directions or suggested tutorials would be appreciated.



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