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 "description": "<DIV STYLE=\"text-align:Left;\"><P STYLE=\"font-size:16ptmargin:0 0 0 0;\"><SPAN><SPAN>A 200\u202fm grid dataset of the BigT, representing the difference in total magnetic intensity across New Brunswick.<\/SPAN><\/SPAN><\/P><DIV><P><SPAN STYLE=\"font-size:16pt\"><SPAN>This dataset shows the BigT, or the total magnetic intensity difference, for the province of New Brunswick at 200\u202fm resolution. It was derived from NRCan airborne magnetic surveys originally flown at 800\u20131000\u202fm line spacing. The BigT_TMI_diff values are calculated by converting the total magnetic intensity (TMI) into magnetic field components (X, Y, Z) and computing the vector magnitude difference between TMI and BigT. The dataset is provided in NB Stereographic double (NAD83) for consistent province-wide coverage. <\/SPAN><\/SPAN><\/P><P STYLE=\"font-size:16ptmargin:0 0 0 0;\"><SPAN><SPAN>The dataset was created from existing NRCan TMI survey grids, converted to ER Mapper format, reprojected to NB Stereographic double, and processed to calculate the BigT_TMI difference from the TMI using magnetic field components.<\/SPAN><\/SPAN><\/P><P><SPAN STYLE=\"font-size:16pt\">Data created Sept 2025.<\/SPAN><\/P><\/DIV><\/DIV>",
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