[FWTools] As uninformed as they get
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
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
Planar_Coordinate_Encoding_Method: coordinate pair
Ellipsoid_Name: Clarke 1866
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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