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  • 1.  opening a Gro Tiff layer

    Posted 06-18-2025 04:01

    I have downloaded data relating to Quebec Wildfire Hazards, but it appears that registration fails as all the data points are in a straight line.  I opened the file successfully on Geo Tiff viewer and in the downloaded set there is a TFW file which I think contains registration info.  I believe you may have seen this before but can't find the solution in the library. Thanks.



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    Roy Marshall
    Director
    CAT Risk Insights
    Chelmsford
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  • 2.  RE: opening a Gro Tiff layer

    Posted 06-20-2025 09:07

    I can add an update, I tried the posted solutions with the same result that MIP will not load it because 'the image control points cannot be in a straight line'.  So on rereading the source info I see that the projection is Lambert Conformal Conic NAD 1983.  So I can actually now load the file with this projection.  However it is now located many miles to the west of WSG 84 Bing Map and even if I modify the registration, it no longer contains the data I need to crate a Wildfire Hazard score for some 2,500 rail post points over the 250 miles of rail track from Sept Isle to Labrador City.  Not given up yet.



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    Roy Marshall
    Director
    CAT Risk Insights
    Chelmsford
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  • 3.  RE: opening a Gro Tiff layer

    Employee
    Posted 06-25-2025 02:08

    Hey Roy

    I had a quick look at the data.

    I tried adding this projection string to my MapInfow.prj file:

    "NAD 1983 Quebec Lambert\p32198", 3, 74, 7, -68.5, 44.0, 46.0, 60.0, 0.0, 0.0

    I now open the GeoTiff file, and selected the new projection.

    I got it placed here:

    It does seem to align nicely with borders in the aerial map.



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    Peter Horsbøll Møller
    Principal Presales Consultant | Distinguished Engineer
    Precisely | Trust in Data
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